TG-ETRX35X-PM-010-110 ETRX351 and ETRX357 Product Manual 1.20 ETRX35x ZIGBEE MODULES N ot R ec om m en de d fo r N ew D PRODUCT MANUAL es ig n Telegesis (c)2015 Silicon Labs ETRX35x Product Manual ETRX351 and ETRX357 Table of Contents 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 PRODUCT APPROVALS ................................................................................................... 6 es ig n 2 Hardware Description ....................................................................................................... 5 FCC Approvals ................................................................................................................. 6 FCC Labelling Requirements ........................................................................................... 7 IC (Industry Canada) Approvals ....................................................................................... 7 European Certification (ETSI)........................................................................................... 8 ICASA Approvals ............................................................................................................. 8 Australia and New Zealand (C-Tick) ................................................................................. 8 Brazil ................................................................................................................................ 9 Declarations of Conformity ............................................................................................... 9 IEEE 802.15.4 .................................................................................................................. 9 The ZigBee Protocol ...................................................................................................... 10 D 1.1 INTRODUCTION ................................................................................................................. 5 N ew 1 3 MODULE PINOUT ............................................................................................................ 11 4 HARDWARE DESCRIPTION ............................................................................................ 13 5.1 5.2 5.3 6 6.1 6.2 fo r 5 Hardware Interface......................................................................................................... 13 FIRMWARE DESCRIPTION ............................................................................................. 14 Token Settings ............................................................................................................... 15 Custom Firmware ........................................................................................................... 15 Software Interface .......................................................................................................... 16 m en de d 4.1 ABSOLUTE MAXIMUM RATINGS ................................................................................... 17 Environmental Characteristics ........................................................................................ 17 Recommended Operating Conditions............................................................................. 17 DC ELECTRICAL CHARACTERISTICS ........................................................................... 18 8 DIGITAL I/O SPECIFICATIONS ....................................................................................... 20 9 A/D CONVERTER CHARACTERISTICS .......................................................................... 21 10 AC ELECTRICAL CHARACTERISTICS ........................................................................... 21 11 PHYSICAL DIMENSIONS................................................................................................. 25 RECOMMENDED SOLDERING TEMPERATURE PROFILE ........................................... 27 ot R 12 TX Power Characteristics ............................................................................................... 23 ec 10.1 om 7 13 PRODUCT LABEL DRAWING ......................................................................................... 28 14 RECOMMENDED FOOTPRINT ........................................................................................ 29 N 14.1 14.2 14.3 Pad dimensions ............................................................................................................. 29 Recommended Placement ............................................................................................. 30 Example carrier board .................................................................................................... 32 15 RELIABILITY TESTS ........................................................................................................ 33 16 APPLICATION NOTES ..................................................................................................... 33 16.1 16.2 Safety Precautions ......................................................................................................... 33 Design Engineering Notes.............................................................................................. 33 (c)2015 Silicon Labs -2- ETRX35x Product Manual (Rev 1.20) ETRX351 and ETRX357 17 17.1 17.2 17.3 17.4 17.5 Storage Conditions......................................................................................................... 34 PACKAGING .................................................................................................................... 34 Embossed Tape ............................................................................................................. 34 Component Orientation .................................................................................................. 35 Reel Dimensions ............................................................................................................ 35 Packaging - bag ............................................................................................................. 37 Packaging - carton ........................................................................................................ 37 es ig n 16.3 ORDERING INFORMATION ............................................................................................. 38 19 ROHS DECLARATION ..................................................................................................... 39 20 DATA SHEET STATUS .................................................................................................... 39 21 RELATED DOCUMENTS ................................................................................................. 39 N ot R ec om m en de d fo r N ew D 18 (c)2015 Silicon Labs -3- ETRX35x Product Manual (Rev 1.20) ETRX351 and ETRX357 The Telegesis ETRX351 and ETRX357 modules are low power 2.4GHz ZigBee modules, based on the latest Ember EM351 and EM357 single chip ZigBeeTM solutions. es ig n These 3rd generation modules have been designed to be integrated into any device without the need for RF experience and expertise. Utilizing the EmberZNet ZigBee stack, the ETRX35x enables you to add powerful wireless networking capability to your products and quickly bring them to market. * * * * * * * * * D ot R * * * * * * * * * * * * m en de d * om * Suggested Applications Small form factor, SMT module 25mm x 19mm Side Castellations for easy soldering and optical inspection 2 antenna options: Integrated chip antenna or U.FL coaxial connector Industry's first ARM(R) Cortex-M3 based family of ZigBee modules Industry standard JTAG Programming and real time network level debugging via the Ember InSight Port 192kB (ETRX357) and 128kB (ETRX351) flash and 12kbytes of RAM Lowest Deep Sleep Current of sub 1A and multiple sleep modes Wide supply voltage range (2.1 to 3.6V) Optional 32.768kHz watch crystal can be added externally Module ships with standard Telegesis AT-style command interface based on the ZigBee PRO feature set Can act as an End Device, Router or Coordinator 24 general-purpose I/O lines including analogue inputs (all GPIOs of the EM35x are accessible) Firmware upgrades via serial port or over the air (password protected) Hardware supported encryption (AES-128) CE, FCC and IC compliance, FCC modular approval Operating temperature range: -40C to +85C Long range version with a link budget of up to 124dB available in the same form factor ec * * AMR - ZigBee Smart Energy applications Wireless Alarms and Security Home/Building Automation Wireless Sensor Networks M2M Industrial Controls Lighting and ventilation control Remote monitoring Environmental monitoring and control fo r Module Features N ew Image not shown actual size; enlarged to show detail. The module's unique AT-style command line interface allows designers to quickly integrate ZigBee technology without complex software engineering. For custom application development the ETRX35x series integrates with ease into Ember's InSight development environment. Radio Features Development Kit * New Development kit containing everything required to set up a mesh network quickly and evaluate range and performance of the ETRX35x and its long-range version. * AT-style software interface command dictionary can be modified for high volume customers. * Custom software development available upon request. Example AT-Style Commands AT+BCAST AT+UCAST:
AT+EN AT+JN Send a Broadcast Send a Unicast Establish PAN network Join PAN At power-up the last configuration is loaded from non-volatile S-Registers, which can eliminate the need for an additional host controller. N * Based on the Ember EM351 or EM357 single chip ZigBee solutions * 2.4GHz ISM Band * 250kbit/s over the air data rate * 16 channels (IEEE802.15.4 Channel 11 to 26) * +3dBm output power ( +8dBm in boost mode) * High sensitivity of -100dBm (-102dBm in boost mode) typically @ 1% packet error rate * RX Current: 26mA, TX Current: 31mA at 3dBm * Robust Wi-Fi and Bluetooth coexistence (c)2015 Silicon Labs -4- ETRX35x Product Manual (Rev 1.20) ETRX351 and ETRX357 1 Introduction es ig n This document describes the Telegesis ETRX351 and ETRX357 ZigBee modules which have been designed to be easily integrated into another device and to provide a fast, simple and low cost wireless mesh networking interface. D The Telegesis ETRX3 series modules are based on the Ember ZigBee platform consisting of the single chip EM351 or EM357 combined with the ZigBee PRO compliant EmberZNet meshing stack. Integration into a wide range of applications is made easy using a simple AT style command interface and advanced hardware design. N ew The configurable functionality of the Telegesis AT Commandset often allows the ETRX3 series ZigBee modules to be used without an additional host microcontroller saving even more integration time and costs. In addition to the Telegesis AT Commandset, the ETRX351 and ETRX357 modules can be used with custom-built firmware whilst representing an ideal platform for custom firmware development in conjunction with the Ember development kits. Hardware Description m en de d 1.1 fo r No RF experience or expertise is required to add this powerful wireless networking capability to your products. The ETRX351 and ETRX357 offer fast integration opportunities and the shortest possible time to market for your product. The main building blocks of the ETRX351 and ETRX357 are the single chip EM351 and EM357 SoCs from Ember, a 24MHz reference crystal and RF front-end circuitry optimized for best RF performance. The modules are available with on-board antenna or alternatively a U.FL coaxial connector for attaching external antennae. Modules with the U.FL connector are identified by the "HR" suffix. om The integrated antenna is an Antenova Rufa, and details of the radiation pattern etc are available from the Antenova website Fehler! Verweisquelle konnte nicht gefunden werden.. Chip EM351 EM351 EM357 EM357 ot R ec Module ETRX351 ETRX351HR ETRX357 ETRX357HR Flash 128kB 128kB 192kB 192kB RAM 12kB 12kB 12kB 12kB Table 1: Memories N The ETRX351 and ETRX357 are used for ZigBee (www.zigbee.org) applications. In case it is desired to develop custom firmware instead of using the pre-loaded AT-Command interface, the Ember InSight toolchain, consisting of InSight DesktopTM together with a comprehensive integrated development environment (IDE), is required. The Ember development environment is currently not suitable for developing an IEEE802.15.4-only application that does not use the ZigBee layer. (c)2015 Silicon Labs -5- ETRX35x Product Manual (Rev 1.20) ETRX351 and ETRX357 2 Product Approvals 2.1 es ig n The ETRX351 and ETRX357 as well as the ETRX351HR and ETRX357HR have been designed to meet all national regulations for world-wide use. In particular the following certifications have been obtained: FCC Approvals N ew D The Telegesis ETRX351 and ETRX357 with integrated Antenna as well as the ETRX351HR and the ETRX357HR including the antennas listed in Table 2 have been tested to comply with FCC CFR Part 15 (USA) The devices meet the requirements for modular transmitter approval as detailed in the FCC public notice DA00.1407.transmitter. FCC statement: This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. m en de d fo r FCC ID: S4GEM35XA Item Part No. 1 BT-Stubby (straight) BT-Stubby (right2 angle) 3 WH-2400-U2.5 Manufacturer EAD Ltd. [6] Type 1/4 Wave EAD Ltd. [6] 1/4 Wave Wellhope Wireless [7] 1/2 Wave 4 Antenova Chip om Rufa (on board) Impedance Gain 50 0dBi 50 0dBi 50 50 2.5dBi 2.1dBi (peak) Table 2: Approved Antennae ot R ec While the applicant for a device into which the ETRX351 (ETRX357) or ETRX351HR (ETRX357HR) with an antenna listed in Table 2 is installed is not required to obtain a new authorization for the module, this does not preclude the possibility that some other form of authorization or testing may be required for the end product. The FCC requires the user to be notified that any changes or modifications made to this device that are not expressly approved by Telegesis (UK) Ltd. may void the user's authority to operate the equipment. N When using the ETRX351HR and ETRX357HR with approved antennae, it is required to prevent end-users from replacing them with non-approved ones. The module and associated antenna must be installed to provide a separation distance of at least 20cm from all persons and must not transmit simultaneously with any other antenna or transmitter. (c)2015 Silicon Labs -6- ETRX35x Product Manual (Rev 1.20) ETRX351 and ETRX357 FCC Labelling Requirements 2.2 es ig n When integrating the ETRX351, ETRX357, ETRX351HR or ETRX357HR into a product it must be ensured that the FCC labelling requirements are met. This includes a clearly visible label on the outside of the finished product specifying the Telegesis FCC identifier (FCC ID: S4GEM35XA) as well as the FCC notice shown on the previous page. This exterior label can use wording such as "Contains Transmitter Module FCC ID: S4GEM35XA" or "Contains FCC ID:S4GEM35XA" although any similar wording that expresses the same meaning may be used. IC (Industry Canada) Approvals N ew D The Telegesis ETRX351 and ETRX357 with integrated Antenna as well as the ETRX351HR and the ETRX357HR modules have been approved by Industry Canada to operate with the antenna types listed in Table 2 with the maximum permissible gain and required antenna impedance for each antenna type indicated. Antenna types not included in this list, having a gain greater than the maximum gain indicated for that type, are strictly prohibited for use with this device. fo r IC-ID: 8735A-EM35XA This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. * Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser) gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that permitted for successful communication. ot R ec * This module complies with FCC and Industry Canada RF radiation exposure limits set forth for general population. To maintain compliance, this module must not be colocated or operating in conjunction with any other antenna or transmitter. This device has been designed to operate with the antennas listed in Table 2, and having a maximum gain of 2.5 dBi. Antennas not included in this list or having a gain greater than 2.5 dBi are strictly prohibited for use with this device. The required antenna impedance is 50 ohms. om * m en de d * N The labelling requirements for Industry Canada are similar to those of the FCC. Again a clearly visibly label must be placed on the outside of the finished product stating something like "Contains Transmitter Module, IC: 8735A-EM35XA", although any similar wording that expresses the same meaning may be used. The integrator is responsible for the final product to comply to IC ICES-003 and FCC Part 15, Sub. B - Unintentional Radiators. (c)2015 Silicon Labs -7- ETRX35x Product Manual (Rev 1.20) ETRX351 and ETRX357 2.3 European Certification (ETSI) The ETRX351, ETRX357, ETRX351HR and ETRX357HR have been certified to the following standards: Radio: EMC: Safety: EN 300 328:V1.8.1 EN 301 489-17:V2.2.1 EN 60950-1:2006 / A12:2011 es ig n * * * D For this purpose the ETRX351HR and ETRX357HR have been tested with the antennae listed in Table 2. fo r N ew If the ETRX351, ETRX357, ETRX351HR or ETRX357HR module is incorporated into an OEM product, the OEM product manufacturer must ensure compliance of the final product to the European Harmonised EMC, and low voltage/safety standards. A Declaration of Conformity must be issued for each of these standards and kept on file as described in Annex II of the R&TTE Directive. The final product must not exceed the specified power ratings, antenna specifications and installation requirements as specified in this user manual. If any of these specifications are exceeded in the final product then a submission must be made to a notified body for compliance testing to all of the required standards. ICASA Approvals om 2.4 m en de d The `CE' marking must be applied to a visible location on any OEM product. For more information please refer to http://ec.europa.eu/enterprise/faq/ce-mark.htm. Customers assume full responsibility for learning and meeting the required guidelines for each country in their distribution market. Australia and New Zealand (C-Tick) ot R 2.5 ec The ETRX351, ETRX357, ETRX351HR and ETRX357HR have been certified to be used in South Africa. The ETRX351, ETRX357, ETRX351HR and ETRX357HR have been certified to be used in Australia and New Zealand. N In order to have a C-Tick mark on an end product integrating an ETRX35x device, a company must comply with a or b below. a). have a company presence in Australia. b). have a company/distributor/agent in Australia that will sponsor the importing of the end product. (c)2015 Silicon Labs -8- ETRX35x Product Manual (Rev 1.20) ETRX351 and ETRX357 2.6 Brazil ot R ec om m en de d fo r N ew D es ig n The ETRX357 and ETRX357HR have been certified to be used in Brazil. 2.7 Declarations of Conformity N Telegesis (UK) Ltd has issued Declarations of Conformity for all ETRX3 series ZigBee RF Modules, which cover Radio Emissions, EMC and Safety. These documents are available from our website or on request. 2.8 IEEE 802.15.4 IEEE 802.15.4 is a standard for low data-rate, wireless networks (raw bit-rate within a radio packet of 250kbps @2.4GHz) which focuses on low cost, low duty cycle, long primary battery life applications as well as mains-powered applications. It is the basis for the open ZigBee Protocol. (c)2015 Silicon Labs -9- ETRX35x Product Manual (Rev 1.20) ETRX351 and ETRX357 2.9 The ZigBee Protocol es ig n The ZigBee Protocol is a set of standards for wireless connectivity for use between any devices over short to medium distances. The specification was originally ratified in December 2004, paving the way for companies to start making low-power networks a reality. D ZigBee uses the IEEE 802.15.4 radio specification running on the 2.4GHz band, plus three additional layers for networking, security and applications. What makes the specification unique is its use of a mesh network architecture which, in bucket chain style, passes data from one node to the next until it lands at its destination. The network is self-healing and adapts its routing as link quality changes or nodes move. Furthermore, nodes can be defined as End Devices which do not act as routers, but can therefore be put into a low-power sleep state. fo r Truly self healing mesh networking Messages can now travel up to 30 hops Source-Routing for improved point to multipoint message transmission Improved security including Trust-Centre link keys New message types and options m en de d * * * * * N ew The enhanced version of the ZigBee standard (or ZigBee 2006) was released in December 2006, adding new features and improvements to the only global wireless communication standard enabling the development of easily deployable low-cost, low-power, monitoring and control products for homes, commercial buildings and industrial plant monitoring. In 2007 the ZigBee Alliance introduced the PRO featureset which offers advantages over earlier versions, including N ot R ec om The Telegesis AT-Commandset, which by default ships on all ETRX3 series products is based on the ZigBee PRO featureset. For more information on the Telegesis AT-Commandset please refer to the separate documentation at www.telegesis.com. (c)2015 Silicon Labs - 10 - ETRX35x Product Manual (Rev 1.20) ETRX351 and ETRX357 fo r N ew D es ig n 3 Module Pinout m en de d Figure 1: ETRX3 series Module Pinout (top view) The table below gives details about the pin assignment for direct SMD soldering of the ETRX3 series modules to the application board. For more information on the alternate functions please refer to [2]. Also refer to the Telegesis AT Commandset documentation and the Telegesis development kit documentation to understand how the pre-programmed firmware makes use of the individual I/Os. All GND pads are connected within the module, but for best RF performance all of them should be grounded externally ideally to a ground plane. N ot R ec om "Important Note: If designers would like to keep open the option of using either standard or long range modules in the same product please note the following. The ETRX35x series and the ETRX35x-LRS series of modules are footprint compatible, but on the ETRX35x-LRS series pins PB0 and PC5 of the EM357 are used internally to control the front-end module and are not available to the user." (c)2015 Silicon Labs - 11 - ETRX35x Product Manual (Rev 1.20) ETRX351 and ETRX357 Name EM35x Pin Default use 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 GND PC5 {1} PC6 PC7 PA7 {5} PB3 {2,3} nReset {6} PB4 {2,3} PA0 PA1 PA2 PA3 GND PA4 PA5 {4} PA6 {5} PB1 {3} PB2 {3} GND GND JTCK PC2 PC3 PC4 PB0 PC1 PC0 {5} PB7 {5} PB6 {5} PB5 GND Vcc GND GND 11 13 14 18 19 12 20 21 22 24 25 GND 26 27 29 30 31 GND GND 32 33 34 35 36 38 40 41 42 43 GND Vcc GND GND TX_ACTIVE OSC32B, nTX_ACTIVE OSC32A, OSC32_EXT TIM1C4 SC1nCTS, SC1SCLK, TIM2C3 I/O I/O I/O I/O, CTS nReset I/O, RTS I/O I/O I/O I/O GND I/O I/O I/O TXD RXD GND GND D TIM2C4, SC1nRTS, SC1nSSEL TIM2C1, SC2MOSI TIM2C3, SC2SDA, SC2MISO TIM2C4, SC2SCL, SC2SCLK SC2nSSEL, TRACECLK, TIM2C2 N ew ADC4, PTI_EN, TRACEDATA ADC5, PTI_DATA, nBOOTMODE, TRACEDATA3 TIM1C3 SC1MISO, SC1MOSI, SC1SDA, SC1TXD, TIM2C1 SC1MISO, SC1MOSI, SC1SCL, SC1RXD, TIM2C2 fo r SWCLK JTDO, SWO JTDI JTMS, SWDIO VREF, IRQA, TRACECLK, TIM1CLK, TIM2MSK ADC3, SWO, TRACEDATA0 JRST, IRQD, TRACEDATA1 ADC2, IRQC, TIM1C2 ADC1, IRQB, TIM1C1 ADC0, TIM2CLK, TIM1MSK m en de d I/O I/O I/O I/O, IRQ I/O I/O I/O I/O I/O GND Vcc GND Alternate Functions es ig n ETRX35x Pad Table 3: Pin Information Notes: om {1} When the alternate function is selected, TX_ACTIVE becomes an output that indicates that the EM35x radio circuit is in transmit mode. PC5 is not usable on the long range version of the ETRX35x as this GPIO is used internally as TX_ACTIVE to control the external RF frontend. ec {2} The serial UART connections TXD, RXD, CTS and RTS are PB1, PB2, PB3 and PB4 respectively. The device sends its data on TXD and receives on RXD. ot R {3} When using the Telegesis AT Commandset, RTS/CTS handshaking is selectable in firmware. See the AT Command Manual. N {4} If PA5 is driven low at power-up or reset the module will boot up in the bootloader {5} PA6, PA7, PB6, PB7 and PC0 can drive high current (see section 8) {6} nRESET is level-sensitive, not edge-sensitive. The module is held in the reset state while nRESET is low See also the table "Module pads and functions" in the ETRX357 Development Kit Product Manual. Refer to Ember's EM357 manual for details of the alternate functions and pin names. (c)2015 Silicon Labs - 12 - ETRX35x Product Manual (Rev 1.20) ETRX351 and ETRX357 4 Hardware Description Vcc I/O LDO 1V8 1,8Vdc integrated antenna A/D UART LDO 1V25 EM35x RESET rf terminal selection, filtering and matching circuitry 24MHz JTAG programming fo r U.FL socket RESET N ew 5 I/O D BALUN es ig n Vreg m en de d Figure 2: Hardware Diagram The ETRX351, ETRX351HR, ETRX357 and ETRX357HR are based on the Ember EM351 and EM357 respectively. The EM351 and EM357 are fully integrated 2.4GHz ZigBee transceivers with a 32-bit ARM(R) Cortex M3TM microprocessor, flash and RAM memory, and peripherals. The industry standard serial wire and JTAG programming and debugging interfaces together with the standard ARM system debug components help to streamline any custom software development. om In addition to this a number of MAC functions are also implemented in hardware to help maintaining the strict timing requirements imposed by the ZigBee and IEEE802.15.4 standards. ec The new advanced power management features allow faster wakeup from sleep and new power down modes allowing this 3rd generation module to offer a longer battery life than any 2nd generation modules on the market. N ot R The EM35x has fully integrated voltage regulators for both required 1.8V and 1.25V supply voltages. The voltages are monitored (brown-out detection) and the built in power-on-reset circuit eliminates the need for any external monitoring circuitry. An optional 32.768 kHz watch crystal can be connected externally to pads 3 and 4 in case more accurate timing is required. To utilize the external watch crystal custom firmware is required. 4.1 Hardware Interface All GPIO pins of the EM351 or EM357 are accessible on the module's pads. Whether signals are used as general purpose I/Os, or assigned to a peripheral function like ADC is set by the firmware. When using the Telegesis AT Commandset please refer to the AT Commandset manual and the development kit manual for this information and when developing custom firmware please refer to the EM35x datasheet [2]. (c)2015 Silicon Labs - 13 - ETRX35x Product Manual (Rev 1.20) ETRX351 and ETRX357 5 Firmware Description The modules will be pre-loaded with a standalone bootloader which supports over-the-air bootloading as well as serial bootloading of new firmware. es ig n In order to enter the standalone bootloader using a hardware trigger pull PA5 to ground and powercycle or reset the module. To avoid entering the standalone bootloader unintentionally make sure not to pull this pin down during boot-up unless the resistance to ground is >10k. (A pull-up is not required). N ew D In addition to the standalone bootloader the modules also contain the current release of the Telegesis AT-style command interface as described in the Telegesis AT command dictionary and the Telegesis user guide. Check www.telegesis.com for updates. Each module comes with a unique 64-bit 802.15.4 identifier which is stored in non-volatile memory. The commands and responses pass through the serial port of the ETRX35x as ASCII text, so a simple terminal application will usually suffice. We provide Telegesis Terminal for interaction with the module but it is not an essential feature. m en de d fo r The pre-loaded AT-style command interface firmware is based on the latest EmberZNet meshing stack which implements routers/coordinators as well as (sleepy) end devices. [End devices have no routing responsibility and therefore are allowed to go to sleep, whilst still being able to send and receive messages via a parent router. In addition to classical sleepy and non-sleepy end devices the module firmware also supports mobile (sleepy) end devices capable of changing their parent quickly whenever they change their position within the network.] A router is typically a mains powered device whilst a sleepy end device (SED) can be battery powered. The module is also able to act as a coordinator and Trust Centre through external host control. The AT style command line supplies all the tools required to set up and manage a ZigBee network by allowing easy access to the low-level functionality of the stack. om The Telegesis firmware uses the meshing and self healing EmberZNet PRO stack to overcome many of the limitations of the tree network topology of the ZigBee 2006 stack by using the ZigBee PRO featureset. N ot R ec The Telegesis firmware allows low-level access to physical parameters such as channel and power level. Parameters that define the functionality of the ETRX35x module and also allow standalone functionality are saved in non-volatile memory organised in so-called S-Registers. The SPI and I2C buses are not supported by the current firmware release, but can be used with custom firmware. (c)2015 Silicon Labs - 14 - ETRX35x Product Manual (Rev 1.20) ETRX351 and ETRX357 5.1 Token Settings D TG Default