RN-41-SM / RN-42-SM
www.rovingnetworks.com
rn-41sm-ds 7/12/2010
809 University Avenue • Los Gatos, CA 95032 • Tel (408) 395-6539 • info@RovingNetworks.com
Class 1 / Class 2 Bluetooth®
Socket Module
Features
• Socket module with UART interface
• 3.3/5V logic CMOS I/O (RS-232 as well)
• Fully qualified Bluetooth 2.1/2.0/1.2/1.1 module
• Bluetooth v2.1+EDR support
• Low power (8-30mA connected, 2mA idle)
• UART supports baud rates from 1200 to 3Mbit
• Sustained SPP data rates - 240Kbps (slave),
300Kbps (master)
• HCI data rates - 1.5Mbps sustained, 3.0Mbps
burst in HCI mode
• HCI mode, or SPP/DUN software stacks
available.
• Embedded Bluetooth stack profiles included
(requires no host stack): GAP, SDP, RFCOMM
and L2CAP, with SPP, DUN and HID profiles.
• RS232 on board with power enable on IO pin.
• Bluetooth SIG Qualified, End Product Listing
• Class 1 high power amplifier (RN-41-SM only)
with on board ceramic RF chip antenna.
o Certifications: FCC, ICS, CE
o Environmentally friendly, RoHS compliant
Applications
• Cable replacement
• Barcode scanners
• Measurement and monitoring systems
• Industrial sensors and controls
• Medical devices
• Asset tacking
Description
The RN-41-SM / RN-42-SM is a though hole, low
power and highly flexible Bluetooth socket module .
This module supports SPP/DUN and HCI Bluetooth
interface protocols, is simple to design in and fully
certified. With its high performance on chip antenna
and support for Bluetooth® Enhanced Data Rate
(EDR), the RN-41 / RN-42 delivers up to 3 Mbps data
rate for distances to 100M / 20M. The RN-41/RN-42
socket module is the perfect method for adding
Bluetooth wireless capability to existing products
without redesign, saving you significant time and
money.
Block Diagram
CSR BlueCore-04
External
BALUN
PA
RF
Switch
Crystal
Flash
Memory
GND
VCC
USB
UART
PCM
PIO6
PIO5
PIO4
RN-41-SM/RN-42-SM Data Sheet
www.rovingnetworks.com
7/12/2010
809 University Avenue • Los Gatos, CA 95032 • Tel (408) 395-6539 • info@RovingNetworks.com
~ 2 ~
Overview
• Baud rate speeds: 1200bps up to 921Kbps, non-standard baud rates can be programmed.
• RN-41: Class 1 radio, 330’ (100m) distance, 12dBm output transmitter, -80dBm typical receive sensitivity
• RN-42: Class 2 radio, 60’ (20m) distance, 4dBm output transmitter, -80dBm typical receive sensitivity
• Frequency 2402 ~ 2480MHz,
• FHSS/GFSK modulation, 79 channels at 1MHz intervals
• Secure communications, 128 bit encryption
• Error correction for guaranteed packet delivery
• UART local and over-the-air RF configuration
• Auto-discovery/pairing requires no software configuration (instant cable replacement).
• Auto-connect master, IO pin (DTR) and character based trigger modes
Environmental Conditions
Parameter
Value
Temperature Range (Operating)
-40
o
C ~ 85
o
C
Temperature Range (Storage) -40
o
C ~ 85
o
C
Relative Humidity (Operating) ≤90%
Relative Humidity (Storage) ≤90%
Electrical Characteristics (RN-41-SM)
Parameter
Min
Typ.
Max.
Unit
Supply Voltage (DC) 3.0 3.3
3
.3V on
Header A,
16V on
Header B
V
RX Supply Current 35 60 mA
TX Supply Current 65 85 mA
Average power consumption
Standby/Idle (default settings) 25 mA
Connected (normal mode) 30 mA
Connected (low power Sniff) 8 mA
Standby/Idle (Deep sleep enabled) 250uA 2.5 mA
Electrical Characteristics (RN-42-SM)
Parameter
Min
Typ.
Max.
Unit
Supply Voltage (DC) 3.0 3.3
3
.3V on
Header A,
16V on
Header B
V
Average power consumption
Radio ON* (Discovery or Inquiry
window time)
40 mA
Connected Idle (No Sniff) 25 mA
Connected Idle (Sniff 100 milli secs)
12 mA
Connected with data transfer 40 45 50 mA
Deep Sleep Idle mode 26 uA
RN-41-SM/RN-42-SM Data Sheet
www.rovingnetworks.com
7/12/2010
809 University Avenue • Los Gatos, CA 95032 • Tel (408) 395-6539 • info@RovingNetworks.com
~ 3 ~
Radio Characteristics (RN-41)
Parameter
Freq.
(GHz) Min Typ Max
Bluetooth
Specification Units
Sensitivity @ 0.1%BER
2.402 - -80 -86
≤ -70
dBm
2.441 - -80 -86 dBm
2.480 - -80 -86 dBm
RF Transmit Power
2.402 15.0 16.0
≤ 15
dBm
2.441 15.0
16.0
dBm
2.480 15.0
16.0
dBm
Initial Carrier Frequency
Tolerance
2.402 - 5 75
75
kHz
2.441 - 5 75 kHz
2.480 - 5 75 kHz
20dB bandwidth for modulated
carrier - 900 1000 ≤ 1000 kHz
Drift (Five slots packet) - 15 - 40 kHz
Drift Rate - 13 - 20 kHz
∆f1
avg
Max Modulation
2.402 140 165 175
>140
kHz
2.441 140
165 175
kHz
2.480 140
165 175
kHz
∆f2
avg
Min Modulation
2.402 140
190 -
115
kHz
2.441 140
190 - kHz
2.480 140
190 - kHz
Radio Characteristics (RN-42)
Parameter
Freq.
(GHz) Min Typ Max
Bluetooth
Specification Units
Sensitivity @ 0.1%BER
2.402 - -80 -86
≤ -70
dBm
2.441 - -80 -86 dBm
2.480 - -80 -86 dBm
RF Transmit Power
2.402 0 2 4
≤ 4
dBm
2.441 0
2
4 dBm
2.480 0
2
4 dBm
Initial Carrier Frequency
Tolerance
2.402 - 5 75
75
kHz
2.441 - 5 75 kHz
2.480 - 5 75 kHz
20dB bandwidth for modulated
carrier - 900 1000 ≤ 1000 kHz
Drift (Five slots packet) - 15 - 40 kHz
Drift Rate - 13 - 20 kHz
∆f1
avg
Max Modulation
2.402 140 165 175
>140
kHz
2.441 140
165 175
kHz
2.480 140
165 175
kHz
∆f2
avg
Min Modulation
2.402 140
190 -
115
kHz
2.441 140
190 - kHz
2.480 140
190 - kHz
RN-41-SM/RN-42-SM Data Sheet
www.rovingnetworks.com
7/12/2010
809 University Avenue • Los Gatos, CA 95032 • Tel (408) 395-6539 • info@RovingNetworks.com
~ 4 ~
Pin Description
NOTE: The RN-41 and the RN-42 are pin and functionally compatible.
Signals on Header A except pins 4, 5, 6 and 7 have the following logic levels.
Input logic level LOW is from -0.4 v to 0.8 V, input high is from 2.1 to 3.4V.
Output logic level LOW max is 0.2 and output HIGH is minimum is 2.8.
All I/O’s except reset default to weak pull down.
Header A
Pin
Name
Description
Default State
1 PIO6 Set BT master (HIGH=auto-master mode) Input with weak pulldown
2 PIO7 Set Baud rate (HIGH = force 9600, LOW = 115K or firmware
setting)
Input with weak pulldown
3 RESET Active LOW reset Input to RN41 with 1K pullup
4 RX RS232 receive input (see note below)
5 TX RS232 transmit output (see note below)
6 RTS RS232 RTS (see note below)
7 CTS RS232 CTS (see note below)
8 VB2 Analog battery monitor signal (Not currently supported in
firmware)
No Connect
9 SHUT
DOWN
Shuts down power to the entire module. Active LOW
10 PRS RS232 power
Short to pin 11 VCC to enable RS232
11 VCC 3.3 3.3V regulated power input
12 GND Ground
Header A
1
2
3
4
5
6
7
8
9
10
11
12
Header A
24
23
22
21
20
19
18
17
16
15
14
13
1 2 3 4 5 6
Header B
3/5V TTL signaling
5-16 VDC power
RN-41-SM/
RN-42-SM
Top View
RN-41-SM/RN-42-SM Data Sheet
www.rovingnetworks.com
7/12/2010
809 University Avenue • Los Gatos, CA 95032 • Tel (408) 395-6539 • info@RovingNetworks.com
~ 5 ~
13 VB1 Analog battery monitor signal No Connect
14 PIO8 Status (RF data rx/tx) Output
15 PIO9 IO Input with weak pulldown
16 PIO10 IO (remote DTR signal) Input with weak pulldown
17 PIO11 IO (remote RTS signal ) Input with weak pulldown
18 RXDB UART receive Input
19 TXDB UART transmit Output
20 RTSB UART RTS, goes HIGH to disable host transmitter Output
21 CTSB UART CTS, if set HIGH, disables TX transmitter input
22 PIO2 Status, HIGH when connected, LOW otherwise Output from RN41
23 PIO3 Auto discovery = HIGH Input t with weak pulldown
24 PIO4 Set factory defaults Input with weak pulldown
Note: When connecting to the RS232 signals on header A: You must connect pin 10 (PRS) to pin 11
(VCC). This powers the RS232 chip. Also make sure that R6 and R8 are installed (default condition).
Header B
1 RX Receive UART Input to module
2 TX Transmit UART Output from module
3 RTS RTS UART, goes HIGH to disable host transmitter
4 CTS CTS UART, if set HIGH, disables transmitter Tie to RTS if NOT driven
5 VDD 5-16 VDC
6 GND Ground
Note: To use Header B you must remove resistors R6 and R8. Removing these resistors disconnects
the RX (header A pin 4) and CTS (header A pin 7) signals from the RS232 chip.
R6
R8
RN-41-SM/RN-42-SM Data Sheet
www.rovingnetworks.com
7/12/2010
809 University Avenue • Los Gatos, CA 95032 • Tel (408) 395-6539 • info@RovingNetworks.com
~ 6 ~
Jumper Settings
The bank of headers on the top of the module control PIO4,
PIO5, PIO6 and PIO7 and correspond directly to the external
switches on the Firefly Bluetooth serial adapter.
Default Baudrate OFF = 115K (can be overridden by software baud rate configuration command),
ON = 9600 (ignores software baudrate configuration)
Auto Discovery In slave mode, sets a special class of device that is used the master to auto connect. If
Switch 3 also ON, the device performs a search, stores, and connects to a remote slave
which has this switch 2 set.
Auto Master Device acts as Bluetooth master, auto-connects to a stored remote address. First set the
Bluetooth address of the slave device using the SR command or through instant cable
replacement settings.
Restore Factory Defaults Set this switch ON, power up unit, and toggle the switch from ON to OFF 3 times to
return the unit to factory settings.
Status LEDs
The Green LED indicates the status of the Bluetooth connection and when the device is in configuration mode.
MODE GREEN LED RED LED
Fast, 10 x per second In Configuration mode
2 times per second Boot up, Remote Configurable
1 time per second Discoverable/Idle Data over the UART
On Solid Connected
Default Baudrate
Auto Master
Auto Discovery
Factory Reset
RN-41-SM/RN-42-SM Data Sheet
www.rovingnetworks.com
7/12/2010
809 University Avenue • Los Gatos, CA 95032 • Tel (408) 395-6539 • info@RovingNetworks.com
~ 7 ~
Hardware Connections and Power
Placing 3.3Vdc into the PIO’s outputs will permanently damage the radio modules. The failure mode is short
across GND and VCC. Use a 10KΩ resistor in series or a 10KΩ pull up resistor for input and output PIO’s
respectively.
• Make sure to connect a common ground when using the external TX, RX inputs 0 – 3.3Vdc.
• For a 3 wire DB-9 interface (tx, rx, gnd only) connect/short CTS to RTS, Factory default is hardware flow
control enabled CTS and RTS connected.
• When using a 5.0Vdc Input, PIO’s require a voltage divider. A good choice is 10K ohm series with 20K to
Ground. PIO’s are 0-3.3Vdc not 5 volt tolerant.
Hardware Communications Connections for Modules
RN-41-SM / RN-42-SM TX
RX of the application Micro Controller Unit (MCU)
RN-41-SM / RN-42-SM RX
TX of the application Micro Controller Unit (MCU)
RN-41-SM / RN-42-SM RTS
CTS of the application Micro Controller Unit (MCU)
RN-41-SM / RN-42-SM CTS
RTS of the application Micro Controller Unit (MCU)
RN-41-SM/RN-42-SM Data Sheet
www.rovingnetworks.com
7/12/2010
809 University Avenue • Los Gatos, CA 95032 • Tel (408) 395-6539 • info@RovingNetworks.com
~ 8 ~
Mechanical Dimensions
0.850
0.080
RN-41-SM / RN-
Top View
Hole Dia.
0.035
Pad Dia.
0.060
0.050
0.050
0.200
0.080
0.100
0.
200
1.230
1.300
0.820
0.080
0.
900
Hole Dia.
0.032
Pad Dia.
0.050
Hole Dia.
0.100
RN-41-SM/RN-42-SM Data Sheet
www.rovingnetworks.com
7/12/2010
809 University Avenue • Los Gatos, CA 95032 • Tel (408) 395-6539 • info@RovingNetworks.com
~ 9 ~
Design Concerns
1. Reset circuit. RN-41-SM / RN-42-SM contains a 1k pullup to VCC, the polarity of reset on the RN-41 / RN-42 is
ACTIVE LOW. A power on reset circuit with delay is OPTIONAL on the reset pin of the module. It should only be
required if the input power supply has a very slow ramp, or tends to bounce or have instability on power up. Use
microcontroller GPIO to control reset once power is stable. Also can be driven from low cost power supervisor
chips available, such as MCP809, MCP102/121, and Torex XC61F.
2. Factory reset PIO4. Connect this pin to a switch, or jumper, or resistor for access. Can be used to reset the
module to FACTORY DEFAULTS and is often critical in situations where the module has been mis-configured. To
set Factory defaults: set pin HIGH, apply power, then toggle 4 times.
3. Connection status. PIO2 is an output which directly reflects the connection state, it goes HIGH when
connected, and LOW otherwise.
4. HCI mode. The RN41-SM module must be loaded with special firmware to run in HCI mode. When in HCI mode
the standard SPP/DUN applications are disabled.
5. Shutdown mode. Pin 9 Shutdown has a pullup to 3.3V. If you pull this pin LOW it shuts down the on board
regulator putting the module in micropower mode. Shutdown also turns off the power to the RS-232 chip so you
can hook the module to a battery and a remote microcontroller like a PIC you can go super low power, wake up
connect send data go to sleep.
6. Minimizing Radio interference The areas under the antenna should not have surface traces, GND planes, or
exposed vias,or metal enclosures for optimal radio performance the antenna
Compliance Information
Category Country Standard
Radio USA FCC CFR47 Part 15 C, para 15.247
FCC ID: T9J-R41-1
EUROPE EN 300 328-1
EN 300 328-2 2.4GHz
CANADA IC RSS-210 low power comm. device
IC Canada ID: 6514A-RN411
EMC USA FCC CFR47 Part 15 subclass B
EUROPE EN 55022 Class B radiated
EN61000-4-2 ESD immunity
EN61000-4-3 radiated field
EN61000-4-6 RF immunity
EN61000-4-8 power magnetic immunity
Bluetooth LISTED B013180
Environmental RoHS RoHS compliant
RN-41-SM/RN-42-SM Data Sheet
www.rovingnetworks.com
7/12/2010
809 University Avenue • Los Gatos, CA 95032 • Tel (408) 395-6539 • info@RovingNetworks.com
~ 10 ~
Ordering Information
Part Number Description
RN-41-SM Socket module with RN-41 (Class 1), No headers installed. Standard 3/5 V
UART and RS232 interface, firmware (SPP/DUN Master and Slave)
RN-42-SM Socket module with RN-42 (Class 2), No headers installed. Standard 3/5 V
UART and RS232 interface, firmware (SPP/DUN Master and Slave)
For other configurations, contact Roving Networks directly.
Visit http://www.rovingnetworks.com/buynow.php for current pricing and a list of distributors carrying our
products.
Copyright © 2009 Roving Networks. All rights reserved.
The Bluetooth trademark and logo are registered trademarks and are owned by the Bluetooth SIG, Inc. All other
trademarks are property of their respective owners.
Roving Networks reserves the right to make corrections, modifications, and other changes to its products,
documentation and services at any time. Customers should obtain the latest relevant information before placing
orders and should verify that such information is current and complete.
Roving Networks assumes no liability for applications assistance or customer product design. Customers are
responsible for their products and applications using Roving Networks components. To minimize the risks associated
with customer products and applications, customers should provide adequate design and operating safeguards.
Roving Networks products are not authorized for use in safety-critical applications (such as life support) where a
failure of the Roving Networks product would reasonably be expected to cause severe personal injury or death,
unless officers of the parties have executed an agreement specifically governing such use.
