STR-RSL10-MESH-KIT-GEVK - ON SEMICONDUCTOR

June, 2020 – Rev. 0.1

RSL10 Mesh Platform User Guide

STR-RSL10-MESH-KIT-GEVK

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Table of Contents

1 INTRODUCTION .................................................................................................................................................................... 4

1.1 FEATURES ........................................................................................................................................................................ 4

1.2 APPLICATIONS ................................................................................................................................................................... 4

1.3 MESH NODE BLOCK DIAGRAM .............................................................................................................................................. 4

1.4 INTENDED AUDIENCE .......................................................................................................................................................... 5

1.5 FURTHER READING ............................................................................................................................................................. 5

1.6 ACRONYMS AND ABBREVIATIONS ........................................................................................................................................... 5

2 RSL10 MESH PLATFORM SETUP ............................................................................................................................................ 5

2.1 RSL10 MESH PLATFORM CONTENTS ...................................................................................................................................... 5

2.2 POWER SELECTION ............................................................................................................................................................. 6

2.3 BATTERY .......................................................................................................................................................................... 6

2.3.1 Requirements ........................................................................................................................................................ 6

2.3.2 Recommended List................................................................................................................................................. 6

2.3.3 Charge Current Control .......................................................................................................................................... 7

2.3.4 NTC and General Precautions ................................................................................................................................. 7

2.4 STRATA AND HARDWARE SETUP ............................................................................................................................................ 7

3 FEATURES ............................................................................................................................................................................. 8

3.1 SENSORS AND INDICATORS ................................................................................................................................................... 8

3.1.1 Tactile Buzzer or Solid-State Relay Connection........................................................................................................ 8

3.2 SECURITY ......................................................................................................................................................................... 8

3.3 COLOR CONTROL ............................................................................................................................................................... 8

3.4 DIMMER .......................................................................................................................................................................... 9

3.4.1 Introduction........................................................................................................................................................... 9

3.4.2 Implementation ..................................................................................................................................................... 9

3.4.3 Dimming without an enclosure ............................................................................................................................ 11

3.5 ALARM.......................................................................................................................................................................... 11

4 BASIC OPERATION .............................................................................................................................................................. 12

4.1 BASIC TAB: VIRTUAL OFFICE ENVIRONMENT NODE LOCATIONS ................................................................................................... 13

4.1.1 Security Camera .................................................................................................................................................. 13

4.1.2 Doorbell .............................................................................................................................................................. 13

4.1.3 Door .................................................................................................................................................................... 13

4.1.4 Dimmer ............................................................................................................................................................... 13

4.1.5 Strata Hub (Provisioner/Gateway) ....................................................................................................................... 13

4.1.6 Robotic Arm......................................................................................................................................................... 13

4.1.7 Solar Panel / Relay ............................................................................................................................................... 13

4.1.8 HVAC ................................................................................................................................................................... 13

4.2 BASIC TAB: VIRTUAL SMART HOME ENVIRONMENT NODE LOCATIONS .......................................................................................... 14

4.2.1 Window ............................................................................................................................................................... 14

4.2.2 Strata Hub (Gateway) .......................................................................................................................................... 14

4.2.3 Door .................................................................................................................................................................... 14

4.2.4 Lights .................................................................................................................................................................. 14

4.3 BASIC TAB: SENSOR ICONS ................................................................................................................................................. 15

4.4 BASIC TAB: HELP AND NODE COMMUNICATIONS ..................................................................................................................... 15

4.5 BASIC TAB: SYNCHRONIZE .................................................................................................................................................. 15

5 ADVANCED OPERATION ..................................................................................................................................................... 15

5.1 ADVANCED TAB: ONE TO ONE ............................................................................................................................................ 16

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5.2 ADVANCED TAB: ONE TO MANY .......................................................................................................................................... 16

5.3 ADVANCED TAB: RELAY ..................................................................................................................................................... 17

5.4 ADVANCED TAB: SENSOR ................................................................................................................................................... 17

5.5 ADVANCED TAB: NODE COMMUNICATIONS ............................................................................................................................ 17

6 FIRMWARE ......................................................................................................................................................................... 18

6.1 SOURCE FILES ................................................................................................................................................................. 18

6.2 COMPILE EXAMPLE PROJECT ............................................................................................................................................... 18

6.3 TEST AND VERIFY EXAMPLE PROJECT WITH STRATA DEVELOPER STUDIO ........................................................................................ 18

6.4 NODE COMMUNICATIONS RAW JSON COMMANDS ................................................................................................................. 19

6.5 TEST AND VERIFY EXAMPLE PROJECT WITH RSL10 MESH APP AND STRATA DEVELOPER STUDIO ......................................................... 19

6.5.1 Configure Gateway Node in GATT Mode .............................................................................................................. 19

6.5.2 Configure a Node in GATT Mode .......................................................................................................................... 20

6.5.3 Control Nodes with Strata Developer Studio ......................................................................................................... 20

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1 Introduction

Bluetooth® Low Energy mesh networking can enable many Internet-of-Things (IoT) applications from Industry 4.0 to Home

Automation and Connected Lighting. The RSL10 Mesh Platform is a versatile and easily configurable development kit that

enables customers to develop mesh networking applications based on the industry’s lowest power Bluetooth 5 radio- the RSL10.

The platform includes two RSL10-based Mesh Nodes, with a variety of available smart sensors and indicators, and a Strata

Gateway Node, which enables connectivity to the Strata Developer Studio™ and allows nodes to be added into the network. Strata

enables users to experiment with basic demos as well as advanced use cases right out of the box. Additional customization is

possible with the RSL10 Semiconductor Software Development Kit (SDK) Mesh CMSIS pack and the source code provided with

this kit.

1.1 Features

 Best-in-class ultra-low-power consumption RSL10 SIP module maximizes battery life

 Ambient light sensor - LV0104CS

 Low-voltage temperature sensor - N34TS108

 Hall-effect switch for simple magnet detection

 Wheatstone bridge for angular magnetic field measurement amplified by NCS333 Chopper-stabilized Op-Amps

 Dual RGB LEDs with 5-bit current-controlled dimming through NCP5623B

 2.3 kHz tone indicator

 Optional tactile buzzer

1.2 Applications

 Industrial IoT

 Home Automation and Security

 Connected Lighting

 Smart Agriculture

 Remote Sensing

1.3 Mesh Node Block Diagram

Figure 1: Mesh Node Block Diagram

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1.4 Intended Audience

Users of the RSL10 Mesh Platform should be familiar with Bluetooth Low Energy and the Bluetooth mesh networking

specification, and have an understanding of how mesh networking is implemented in Bluetooth devices. Additionally, an

understanding of the ON Semiconductor RSL10 Bluetooth Radio System-on-Chip (SoC) and associated Software Development

Kit (SDK) and Integrated Development Environment (IDE) will be needed to customize the features and functionality of the mesh

network.

1.5 Further Reading

 RSL10 Documentation Pack

 RSL10 Mesh Package

 Bluetooth® Mesh Networking Specification

 RSL10SIP Datasheet

 FAN54120 Datasheet

1.6 Acronyms and Abbreviations

 (ADC) Analog-to-Digital Converter

 (AMR) Anisotropic-Magnetoresistive

 (IDE) Integrated Development Environment

 (IoT) Internet-of-Things

 (LED) Light-emitting Diode

 (NTC) Negative-Temperature Coefficient

 (SDK) Software Development Kit

 (SoC) System-On-Chip

2 RSL10 Mesh Platform Setup

2.1 RSL10 Mesh Platform Contents

 (2) RSL10 Mesh Nodes

 (1) Strata Gateway Node

 (3) USB cables

 (1) Rare earth ring magnet (for Alarm and Dimmer functions)

 Disclaimer

Figure 2: Mesh Platform Contents

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2.2 Power Selection

Each Mesh Node has a 4-pin header to select whether or not a battery is being used. The default selection is with a jumper placed

across the two middle pins, resulting in isolation of the battery rail and associated charging circuit and the node being powered

directly from the 5V rail, which is sourced from USB or the Strata Gateway.

If using a rechargeable battery, which fits the requirements in section 2.3.1 to power the node and allow the node’s USB port to

charge the battery, place two jumpers across each pair of end pins as shown in Figure 3.

Figure 3: Power Selection Jumper Positions

2.3 Battery

The Mesh Kit does not include batteries but if one is used it must fit the following requirements or be from the recommended list.

2.3.1 Requirements

The Mesh Node contains the ON Semiconductor FAN54120, a stand-alone Lithium-Poly/Lithium-Ion single-cell battery charger.

The float charge voltage is fixed such that using a battery with a different float voltage than the following specification requires

changing the battery charger IC to a different fixed voltage version and is only advised for advanced users with soldering

capabilities.

The primary battery connection is the JST-PH connector commonly found on Li-Poly batteries available on the market. Advanced

users can solder battery wires directly to the board using the provided test points, but caution must be used to identify the correct

polarity and ensure the battery fits the requirements.

Battery Type

Li-Poly/Li-Ion Single Cell

Battery Capacity

70 mAh – 1250 mAh

Float Charge Voltage

4.2V

Nominal Voltage

3.7V

Connector

JST-PH

Protection Circuit Module (PCM)

Required

2.3.2 Recommended List

Size [mAh]

Manufacturer

MPN

Suggested I_Fast [mA]

100

Adafruit

1570

150

Adafruit

1317

350

Adafruit

2570

100

400

Adafruit

3898

200

500

Adafruit

1578

250

1200

Adafruit

258

495

110

Sparkfun

PRT-13853

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400

Sparkfun

PRT-13851

200

850

Sparkfun

PRT-13854

400

1000

Sparkfun

PRT-13813

495

2.3.3 Charge Current Control

The FAN54120 sets the I_Fast charge current value via an external resistor, which is used to control the current during the

Constant Current (CC) phase of battery charging. The Mesh Node has a dial potentiometer circuit for the set resistor so that the

charge current can be adjusted across the full current range of the device, from 50 mA up to 495 mA.

The potentiometer default position sets the I_Fast current to 50 mA, which is the safest value to use with all of the recommended

batteries. Warning! Never set the charge current value too high for the battery being used as it can cause a fire or explosion.

Always exercise caution before adjusting the battery charge current. If a specific R_set value is desired, the potentiometer can

be removed and R13 replaced with the desired resistor. See the FAN54120 datasheet for more information.

2.3.4 NTC and General Precautions

Each Mesh Node contains a Negative-Temperature Coefficient (NTC) resistor, RT1, on the top of the board that can be used to

automatically reduce the battery charging current if the temperature gets past a certain threshold. Place the battery on top of the

board near the NTC resistor to get the most benefit from this feature. Further information can be found in the FAN54120

datasheet.

As with all lithium batteries, proper precautions must be followed when using them. Adhere to all warnings in the battery datasheet

and use common sense. Do not leave batteries charging unattended or near heat sources like soldering irons. Always know where

the nearest fire extinguisher is located and how to use one. ON Semiconductor is not responsible for any damages caused by

careless use of lithium batteries. For more information, see the disclaimer included with the evaluation kit.

2.4 Strata and Hardware Setup

Download Strata Developer Studio from www.onsemi.com/Strata

Connect the PC running Strata to the Gateway node using one of the included USB cables, attaching to the USB port on the

stacked daughter-board as depicted in Figure 4. If a battery is not being used with the nodes, connect them to any USB power

source using the provided cables.

Figure 4: Connect the Gateway node to Strata

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3 Features

3.1 Sensors and Indicators

The Mesh Node supports a variety of sensors and indicators that can be customized for many applications. All sensors and

indicators listed are included on each node, except the optional Tactile Buzzer which can be purchased from Adafruit.

Sensor

Manufacturer

MPN

Interface

Ambient Light

ON Semiconductor

LV0104CS

I2C

Temperature

ON Semiconductor

N34TS108

I2C

Hall Effect Magnet Detection

Melexis

MLX90248

Open Drain

Magnetic Field Direction

Honeywell

HMC1512

Analog

Indicator

Manufacturer

MPN

Interface

RGB LED Driver

ON Semiconductor

NCP5623B

I2C

Alarm Buzzer

PUI Audio

AI-1223-TWT-3V-2-R

GPIO

Tactile Buzzer (optional)

Adafruit

1201

GPIO

3.1.1 Tactile Buzzer or Solid-State Relay Connection

The tactile buzzer connection is shown below in Figure 5 and is reference designator J2. If the Adafruit tactile buzzer is purchased

separately it can be connected to this header with the red wire being soldered into the square pad. Additionally, the same header

can be used to connect a solid-state relay or low voltage signal relay. The resistor R7 should be updated to limit the current to no

more than 50 milliamps for any connected device.

Figure 5: Tactile Buzzer Header

3.2 Security

All traffic in a mesh network is encrypted. When each node is provisioned into the network, it receives a Network Key (NetKey)

and an Application Key (AppKey). The NetKey allows a node to decrypt the traffic passing through it and relay the information

without being able to actually decrypt the application level contents of the packets, which only the nodes with the appropriate

AppKey can do. This helps make the network resilient to certain types of attacks as well as guarantees that only the nodes that

need to know the contents of mesh traffic are able to access it.

3.3 Color Control

Each Mesh Node is assigned a color as it is provisioned into the network. All of the nodes colors can be changed to a specific

node’s color by clicking on that node within Strata when connected to a Gateway node, or an individual node’s color can be

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changed by right clicking that node and selecting a new color from the HSL slider. Due to the RGB LED Driver only supporting 5

bits of dimming, the selected color may not perfectly match the node.

3.4 Dimmer

3.4.1 Introduction

The ON Semiconductor Mesh Node contains a dual Wheatstone bridge with special resistors which exhibit a property known as

Anisotropic Magnetoresistance (AMR) that causes the resistor to change its impedance based on the angle of the applied magnetic

field which is saturating the material. This results in a change in current flow through the bridge elements which is proportional to

the direction of the applied magnetic field. The sensor utilized is the HMC1512 sensor from Honeywell Aerospace, and the

following figures are from the component datasheet and the Honeywell Application Note AN211, which describes various

applications of their AMR sensors.

Figure 6: Anisotropic Magnetoresistance concept and application in a Wheatstone bridge

The HMC1512 sensor contains two AMR Wheatstone bridges, one of which is rotated 45 degrees with respect to the other sensor,

and both of which are physically located at the exact center of the sensor package. This results in a sine and cosine output from the

bridges as a magnetic field is rotated near the sensor, such that the direction of the applied magnetic field angle θ (Theta) can be

calculated from the bridge output voltages.

Figure 7: Sensor package, bridge configuration, and output signals

ΔVa = (Bridge Supply Voltage) * (Material Constant) * Sin(2θ)

ΔVb = - (Bridge Supply Voltage) * (Material Constant) * Cos(2θ)

θ = ½ ArcTan(ΔVa/ΔVb)

3.4.2 Implementation

Output voltages from the Wheatstone bridge sensors are typically less than 100 millivolts peak-to-peak, so they must be amplified

with minimal offset voltage before being sampled by an Analog-to-Digital Converter (ADC) in a microcontroller. The Mesh Node

includes two ON Semiconductor NCS333 chopper-stabilized Op-Amps, one for each Wheatstone bridge, with zero-drift and low

10 microvolt offset, in a differential amplifier configuration with gain of approximately 13 V/V. Each bridge is powered with the

system voltage of 2.8V, so the signals are centered about 1.4V with a small offset due to manufacturing tolerances which must be

accounted for with a calibration procedure and removed before using the measured signals to calculate Theta.

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The NCS333 Op-Amps can be utilized in many other Wheatstone bridge sensing applications such as industrial and aerospace.

Figure 8: Simplified NCS333 Block Diagram

Figure 9: Mesh Node Amplification Circuit

The magnet used with the Mesh Node is a diametrically magnetized ring magnet, such that the magnetic field angle can easily be

measured by the AMR sensor when being rotated around the center of the ring. The dimmer functionality is only active when a

magnetic field is detected by the Hall-effect open-drain switch located just above the AMR sensor, and provides 150 degrees of

dimming with a 15 degree guard-band on each side. The field angle is mapped to a 5-bit current limit value which is consistent

with the range available in the NCP5623B LED drivers on each node, and then sent to all the nodes in the network to control their

brightness levels.

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Figure 10: Diametrically magnetized ring magnet

Figure 11: Mesh Node on dimmer pad showing range of operation

3.4.3 Dimming without an enclosure

A printable template is available for download in Strata for taping down the magnet and overlaying the evaluation board to use the

dimming feature without any printed plastic enclosures. A paperclip can be used to find the pole of the magnet to assist with

orientation on the template. Additionally, 3D printing files for the enclosures are also available for download in Strata.

3.5 Alarm

The alarm function in the mesh node is a simple hall-effect open-drain switch which is active when the node is placed on a

magnetic field and inactive if no magnet is detectable at all. This is similar to how most entry sensors in home security and

automation function and is meant to demonstrate that application within a mesh network.

When the alarm node is removed from its magnet, a broadcast notification is sent to all other nodes to indicate an alarm condition

and blink their lights red for approximately 15 seconds. Only after the node is placed back on its magnet, the alarm condition stop

and all nodes return to their assigned colors.

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The same printable template from Appendix A for the dimmer feature can be used to evaluate the alarm feature. Simply place the

magnet on the printed page in the ring and place the mesh node over the board outline to disarm the alarm. Similarly, remove the

mesh node from the board outline to trigger the alarm. 3D printing files for the enclosures are available for download in Strata.

This type of sensing isn’t only limited to doors and entry points, but can also be used with emergency equipment like AEDs and

fire extinguishers to immediately notify emergency service personnel and first responders of incidents even before they get called

in.

4 Basic Operation

The Basic UI can be switched between a virtual office and a smart home environment via drop-down menu. Mesh nodes are

located in the virtual environment and take a role based on their specific location when drag-and-dropped in the top bar. For

example, a mesh node in the office image location next to the fire extinguisher labelled ‘doorbell’ will enable the magnetic contact

and make a beep sound when the provided magnet is removed.

Figure 12: Basic Control View

When a mesh node is powered, it will provision and show up on one of the locations in the Node Bar above the image with its

color and mesh Unique Address (uAddr). Refer to Figure 12 above for the pink node with mesh uAddr 2. The Green Strata mesh

node is the mesh hub node (Provisioner/Gateway) that is always present which Strata uses to send messages into the BLE mesh

network. The Provisioner/Gateway node establishes the mesh network and it will always assign itself mesh uAddr 1.

All nodes present in the network can be moved to a different location in the virtual environment views by dragging and dropping

the node to any other open node location on the Node Bar, except the Gateway node at the Strata location (uAddr 1). The small

circle in the image will change to the color of the node and also show the corresponding uAddr. The node will have different

behavior and responses depending on its location.

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4.1 Basic Tab: Virtual Office Environment Node Locations

4.1.1 Security Camera

When the small circle located in the UI at security camera is clicked, all mesh nodes will change their color to the color of the

mesh node at this location. If there is no mesh node at the location all of the mesh node lights will be switched off.

4.1.2 Doorbell

When a node is dragged to doorbell location in the node bar, the mesh node will enable the magnetic contact to detect any magnet

underneath it. If there is no magnet present a beep will sound for 2 seconds. Both the connection and disconnection events are sent

from the mesh nodes to the Gateway and can be seen on the node communication window. When the small circle located in the UI

at fire extinguisher is clicked, the Gateway node will send message to the mesh node to beep the buzzer for 2 seconds simulating

magnet behavior.

4.1.3 Door

When a node is dragged to door location in the node bar, the mesh node will enable the magnetic contact to detect any magnet

underneath it. If there is no magnet present the light alarm will activate for about 10 seconds where all of the mesh nodes and the

virtual office will blink red. The red flashing will continue until the magnet is detected again or the node is moved to a different

location in the node bar. The alarm will stop after the timer expires and the conditions have changed as mentioned earlier. When

the small circle located in the UI at door is clicked, the Strata node will send message to the mesh node to simulate alarm behavior.

Door open condition can also be simulated by pressing DIO12 switch till 2 beeps occur. The alarm will stop once timer expires.

4.1.4 Dimmer

The mesh node will enable the magnetic contact to detect magnetic field angle. When moving a node to this location make sure it

is not making contact with the magnet. This assures magnet calibration for dimmer operation when node makes contact with

magnet after the node has been dragged to dimmer position in UI. After calibration the node can be rotated slowly over the magnet

and it will dim the lights on all mesh nodes. If the dimmer is moved too fast, more messages will be sent out in the network as the

dimmer position updates, which can jam the mesh network.

4.1.5 Strata Hub (Provisioner/Gateway)

The mesh node at this location cannot be moved. When the small circle in the UI is clicked, transmission RF power level of the

strata node is toggled: white light indicates lowered RF power and green light indicates nominal RF power. Lower RF power level

can be helpful in the Relay demonstration. See Relay below for more information.

4.1.6 Robotic Arm

When the small circle located at robotic arm in the UI is clicked, all mesh nodes will change their color to the color of the mesh

node at this location. If there is no mesh node at the location, all mesh nodes light will be switched off.

4.1.7 Solar Panel / Relay

When the small circle located at solar panel in the UI is clicked, it will toggle between: Relay On or Off, turning its LEDs white or

node color respectively. This is used in the Relay demonstration. With the Relay enabled, nodes normally outside the Gateway’s

range can communicate by relaying information through the Relay node.

4.1.8 HVAC

This mesh node can be physically located out of range of all other nodes except of the Solar Panel node. When enabling Relay on

the solar Panel node this node will respond to commands from the nodes that are out of range, but when relay is disabled it will

not. When left-clicking the small circle in the image all mesh nodes will change their color to the color of the mesh node at this

location. If there is no mesh node at the location, all mesh nodes light will be switched off.

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4.2 Basic Tab: Virtual Smart Home Environment Node Locations

Figure 13: Basic UI View

4.2.1 Window

The mesh node will enable the magnetic contact to detect any magnet underneath it. If no magnet is detected, the electronic

frosting on the glass window toggles off and reveals the city skyline outside. When placed on the magnet, the electronic frosting

on the glass will toggle on.

4.2.2 Strata Hub (Gateway)

The mesh node at this location cannot be moved. When the small circle located at Strata in the UI it will toggle between RF power

levels: white light indicates lowered RF power and green light indicates nominal RF power.

4.2.3 Door

The mesh node will enable the magnetic contact to detect any magnet underneath it. If no magnet is detected, the door opens.

When placed on the magnet, the door closes.

4.2.4 Lights

Clicking on this location in the virtual environment image will cycle the lights on all the nodes and in the virtual smart home

through several different colors.

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4.3 Basic Tab: Sensor Icons

At the bottom of virtual environment is a series of buttons.

Figure 14: Sensor Icons

These buttons will ping all available nodes sequentially and read back sensor data for the environmental readings of Signal

Strength, Ambient Light, Battery, Temperature, and the Node Map. When pressed, the button will go dark to indicate it is reading

the sensor data from the nodes. Sensor data will be populated under the respective node in the node bar.

4.4 Basic Tab: Help and Node Communications

At the top right corner of virtual environment there are 2 button icons.

Figure 15: Help and Communication Icons

The question mark button will open help document pane. The other icon will open node communication pane. Node

communications pane will show all the print messages between Gateway and the nodes.

4.5 Basic Tab: Synchronize

Synchronize button is located next to the Virtual Environment selection drop-down.

Figure 16: Synchronize Button

When this button is pressed all the nodes in the network will be assigned with the role based on their location in the UI. This

button is required to be used only the first time when the nodes are added to the network as they are unaware of their node

location. Switching between Office and Smart Home view or Basic and Advanced tab would do the same.

5 Advanced Operation

The advanced tab allows the user to demonstrate various aspects of communication between Gateway and Nodes. The lowest

available mesh address node will be used for these demonstrations.

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5.1 Advanced Tab: One to One

Address in node 2 (right) is configured to subscribe to GROUP_ID (0xC1E1). When switch on node 1 is toggled, the Gateway

sends message out to the GROUP_ID to toggle LEDs between white color and off. This will toggle lights of the nodes which are

subscribed to the GROUP_ID, in this case address in node 2. The message sent out can be observed in Node Communications

pane.

Figure 17: Advanced UI View – One to One

This feature can be tested by pressing DIO12 switch on the board till you hear 1 beep. It will send the same message as the switch

in the UI. Note: This will only work from node which is not subscribed to GROUP_ID.

5.2 Advanced Tab: One to Many

When the switch on node 1 (left) is toggled, the Gateway sends message out to BROADCAST_ID (0xFFFF) to toggle LEDs

between white color and off. As the message is sent to BROADCAST_ID, all the nodes provisioned in the network (with same

appKey) will receive the message and toggle their lights. The message sent out can be observed in Node Communications pane.

Figure 18: Advanced UI View – One to Many

This feature can be tested by pressing DIO12 switch on the board quickly (no beep should be heard). It will send the same message

as the switch in the UI.

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5.3 Advanced Tab: Relay

Relay allows node 1 to communicate with node 3 through node 2 (when relay is enabled). If node 3 is placed out of range of node

1, node 2 can pass information bi-directionally to node 3. If relay switch is off, node 3 and node 1 will not communicate with node

3 out of range. Relay switch enables/disables relay feature for the address in node 2. The messages sent out can be observed in

Node Communications pane. To test relay feature easily in a small room, you can reduce transmission power of Gateway node, so

that the remote node won’t receive messages sent out by Gateway at a shorter distance. To reduce transmission power of Gateway

node, click on the small circle in the UI on basic view.

Figure 19: Advanced UI View – Relay

5.4 Advanced Tab: Sensor

When the switch on node 1 is toggled, Gateway sends out message asking for temperature sensor data from node 2. Node 2 will

respond back to node 1 with the sensor data. The message sent out can be observed in Node Communications pane.

Figure 20: Advanced UI View – Sensor

5.5 Advanced Tab: Node Communications

All the node communication exchange is printed on this pane. This pane can be accessed from Basic Tab of the UI as well. You

can send raw JSON commands to the platform via line edit box on the left corner of the UI. Refer firmware section for the

commands.

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6 Firmware

6.1 Source Files

Brief description of all the important source files included in the strata_ble_mesh_node example project.

File Name

Description

include/app_mesh.h

Select between mesh application gateway or server.

app.c

Main application file. It has logic for all the peripherals.

code/app_init.c

Application initialization such as GPIOs, SPI, I2C, etc.

code/app_process.c

Application task handler and supporting process. ISR and peripheral

callback functions.

code/dimmer_operation.c

Dimmer application api calls.

ethermind/mesh/export/sample/appl_strata_gateway.c

ADV/GATT bearer standalone provisioner application.

ethermind/mesh/export/sample/appl_strata_server.c

ADV/GATT bearer server sample application.

ethermind/mesh/export/strata/.

Generic application model client and server libraries for on-off,

sensor, battery, light HSL.

6.2 Compile Example Project

1. Download and install “RSL10” and “RSL10Mesh” CMSIS packs, if already not installed.

2. Download “StrataRSL10Mesh” CMSIS pack from onsemi website.

3. Import the CMSIS pack in IDE from pack manager.

4. Copy “strata_ble_mesh_node” project from examples tab for RSL10.

5. Setting up the example project is similar to “ble_mesh” example project.

6. Open app_mesh.h and define MESH_APP. Use MESH_APP_SA_ADV_STRATA_GATEWAY for compiling source

code for Gateway/Provisioner. Use MESH_APP_SA_ADV_STRATA_SERVER for compiling source code for a node.

7. Compile and flash the project using “Run” launch mode and Jlink.

8. Hex file for Strata-Linked board which communicated with Strata Developer Studio is provided in the pack as well as

content download in Strata Developer Studio.

9. Refer section 6.6 to compile and verify the project without using Strata Developer Studio.

10. Serial communication with Strata Developer Studio is done through strata-linked board. This is an adaptor board mounted

on Gateway node. Source hex file for this particular board is available in Strata Developer Studio collateral download as

well as on ONSemi public website.

6.3 Test and Verify Example Project with Strata Developer Studio

1. Open Strata Developer Studio and log in.

2. Connect USB cable to strata linked board on Gateway.

3. Strata Developer Studio will detect the board and open control view for mesh platform.

4. Once Gateway is initialized, LEDs on Gateway node will turn green.

5. Power on Strata server node and wait till it is provisioned. You can see the communication between gateway and server

node in node communications pane.

6. Once the node is provisioned, node LEDs will change the color to pink (uAddr 2) from blue.

7. Wait till the LEDs on the recently provisioned node dim down. This is required to finish application key bindings to the

models of the node. If this is interrupted, models will not work correctly.

8. Once the node is correctly provisioned, power up another node if wanted.

9. Once mesh network is established, navigate through UI to test various features.

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6.4 Node Communications Raw JSON Commands

JSON formatting is important while sending a command using “Node Communications” pane. Use a JSON validator before

sending the command. Copy paste the command hit enter.

1. {"cmd":"light_hsl_set","payload":{"uaddr":2,"h":60,"s":100,"l":50}}

This command will set HSL value to node address 0x0002. “h” represents hue which varies between 0 to 359. “s”

represents saturation which varies between 0 to 100. “l” represents lightness which varies between 0 to 100. You can

broadcast the HSL message using “uaddr” value of 65535 (0xFFFF).

2. {"cmd":"sensor_get","payload":{"uaddr":3,"sensor_type":"temperature"}}

Read sensor data from a particular node provisioned in the network which can be selected by changing the uaddr.

“uaddr” is unique addressed assigned to the node by Gateway at the time of provisioning. Various sensor_types can be

read by changing the string to any one of the following: ambient_light, rssi (signal strength), battery, temperature.

3. {"cmd":"sensors_get_all","payload":{"sensor_type":"temperature"}}

Read sensor data from all the nodes provisioned in the network. Various sensor_types can be read by changing the string

to any one of the following: ambient_light, rssi (signal strength), battery, temperature.

4. {"cmd":"set_groupid","payload":{"uaddr":2,"group_id":49633,"model":"light_hsl_server","subscribe":true}}

This command would subscribe a model to a particular group id. For example in the above command, Light HSL Server

model of node with address 0x0002 is subscribed to group id 0xC1E1. If light HSL message is sent to 0xC1E1 group id,

Node address 2 will change its color. To de-subscribe from a group id, change “subscribe” value to false. Following

server models are supported sensor_server, battery_server, onoff_server.

5. {"cmd":"set_node_mode","payload":{"uaddr":2,"mode":"dimmer","enable":true]}}

This command will enable various modes from Strata UI such as dimmer, door, etc. for node address 0x0002. To disable

the mode value of “enable” will be false. This command uses sensor setup server to send message.

6. {"cmd":"bind_appkey_model","payload":{"uaddr":2,"model":"light_hsl_server"}}

This command would bind application key to light HSL Server model of node with address 0x0002. Following server

models are supported light_hsl_setup_server, sensor_server, sensor_setup_server, battery_server, onoff_server,

config_server.

7. {"cmd":"get_network_map","payload":{"format":1}}

This command will show the network map. It will return with available node addresses, all the bound models for the

particular nodes. If “ready” is 1, it implies the node is provisioned in the network.

6.5 Test and Verify Example Project with RSL10 Mesh App and Strata Developer Studio

1. Download “RSL10 Mesh” mobile app from Google Play.

2. Open Strata Developer Studio and log in.

3. Power up strata linked board on Gateway via USB cable.

6.5.1 Configure Gateway Node in GATT Mode

1. By default all the nodes and Gateway node power up in ADV mode.

2. To switch it to GATT mode, reset strata link CPU twice and hold the reset button.

3. Now press and hold DIO12 button (action button) on mesh board.

4. Release reset button but hold the DIO12 button for couple of seconds.

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Figure 21: Annotated Node Board

5. LEDs on the Gateway node will stay BLUE until the node is provisioned with mobile app.

6. Meanwhile, Strata Developer Studio will detect the board and open control view for mesh platform. You can observe

Node Communications on it.

7. Open the RSL10 Mesh mobile app and select “Add new device”.

8. Select ON-SEMI-GATEWAY once detected in the scan.

9. Select “Identify” and then followed by “Provision”.

10. You will see the “Provisioning log”.

11. Once provisioning is complete, LEDs will go GREEN.

12. Select “CONFIGURE NOW”.

13. Select “Add App Key” followed by “Select AppKey” from the list.

14. Open list of models under “Element Details” from the drop-down.

15. Select a model from the list for example “Light HSL Client”. Now bind App key the model by selecting “+” sign.

16. Follow the step 12 for all the models in the list.

17. Select “Add Feature” and enable “Proxy”. This step only needs to be done for Gateway node.

18. Now go back to “My Network” => “Devices”, you should see ON-SEMI-GATEWAY under configured nodes.

19. Select vertical 3 dots menu located next to the ON-SEMI-GATEWAY label.

20. Select “Mesh Control”, this will open controls for the model. Currently only Light HSL Server model is supported.

21. Changing the sliders for Hue, Saturation and Lightness will reflect the color on the LEDs.

6.5.2 Configure a Node in GATT Mode

1. Follow same steps as Gateway Node to switch to GATT mode.

2. In RSL10 Mesh mobile app, select blue colored “+” sign to add new device.

3. Select ON-SEMI-SERV-NODE once detected in the scan.

4. Follow same steps as Gateway node except step 17.

5. Once the node is provisioned, the LEDs will change color.

6.5.3 Reset Network in GATT Mode

Go back to “My Network” => select “Settings” in top right corner => select “RESET PROVISIONER”. This will clear

all the nodes in network shown in the app. You can now start over with a new network.

6.5.4 Control Nodes with Strata Developer Studio

1. In Strata Developer Studio => Basic Tab => Signal Strength, click on RSSI/Signal Strength button on the bottom of the

UI.

2. This will detect all the nodes available in the network which were set up over mobile app earlier.

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6.6 Test and Verify Example Project without Strata Developer Studio

1. Remove strata-linked board from Gateway node board.

2. Recompile the example project with following changes:

a. Open "EM_platform.h" from strata_ble_mesh_node project ethermind/platforms/rsl10/EM_platform.h

b. Define RSL10_DBG variable to be DBG_UART instead of DBG_SPI.

c. This will enable UART on GPIO 6 and 7 as RX and TX respectively.

3. Compile and flash the project onto the board.

4. Use any USB to TTL UART RS232 Serial Port Converter available in the market and attach RX, TX, GND pins on the

strata header J4 pins 11, 13, 2 respectively.

5. Open a serial terminal program such as PuTTY, TeraTerm, CoolTerm,etc. at 115200 baud rate and you can see all the

communication on the terminal.

NOTE: You will not be able to send JSON commands over this interface as they are decoded in the strata-linked firmware.

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