Radio Bridge RBM101i-319 User manual

Wireless Receiver
For 319MHz Sensors
RBM101i-319 User Guide
VERSION 0.1
APRIL 2017

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TABLE OF CONTENTS
1. RADIO BRIDGE RBM101I USER GUIDE ...................................................................................... 3
1.1. About this Guide ........................................................................................................................3
1.2. Revision History .........................................................................................................................3
1.3. Document Conventions ..............................................................................................................3
1.4. Part Numbers.............................................................................................................................4
2. TECHNICAL SPECIFICATIONS..................................................................................................... 4
2.1. General Specifications ................................................................................................................4
2.2. Power Requirements..................................................................................................................4
2.3. Pin Signals..................................................................................................................................5
3. SERIAL COMMANDS ................................................................................................................. 6
3.1. Commands to the Module ..........................................................................................................6
3.2. Messages from the Module ........................................................................................................6
3.2.1. “CMD”: Command Response .................................................................................................... 7
3.2.2. “ERR”: Error Message................................................................................................................ 7
3.2.3. “STA”: Status Message.............................................................................................................. 7
3.2.4. “SEN”: Sensor Message............................................................................................................. 8
3.3. AT Command Reference .............................................................................................................9
3.3.1. AT Commands ...........................................................................................................................9
3.3.1.1 AT –Attention.......................................................................................................................9
3.3.1.2 WR –Write Configuration.....................................................................................................9
3.3.1.3 RE –Restore Parameters.......................................................................................................9
3.3.1.4 FR –Factory Reset................................................................................................................. 9
3.3.1.5 DI –Device ID ......................................................................................................................10
3.3.1.6 Enter Bootloader.................................................................................................................10
3.3.1.7 BT –Bootloader Timeout ....................................................................................................10
3.3.1.8 VR –Firmware version ........................................................................................................10
3.3.1.9 HR –Hardware version .......................................................................................................10
3.3.1.10 DB –RSSI of last packet ..................................................................................................11
3.3.1.11 BR –Baud Rate ...............................................................................................................11
3.3.1.12 DF –Duplicate Filter .......................................................................................................12
4. MESSAGES.............................................................................................................................. 13
4.1. Sensor Event Messages.............................................................................................................13
4.2. Status Messages.......................................................................................................................14

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4.3. Error Messages.........................................................................................................................14
5. CONFIGURATION.................................................................................................................... 16
5.1. Bootloader...............................................................................................................................16
5.1.1. Using Terminal Emulators.......................................................................................................16
6. MECHANICAL DRAWINGS....................................................................................................... 18
7. TRADEMARKS AND COPYRIGHT.............................................................................................. 19
8. DISCLAIMERS, WARRANTY, AND CUSTOMER SUPPORT .......................................................... 19
8.1.1. Disclaimers ..............................................................................................................................19
8.1.2. Warranty .................................................................................................................................19
8.1.3. Customer Support...................................................................................................................19

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1. RADIO BRIDGE RBM101I USER GUIDE
1.1. About this Guide
The RBM101i BridgeBee™module described in this document is a 319MHz receiver for
wireless sensors and devices found in home security installations, home automation systems,
life safety products, and more. The RBM101i-319 compatibility list includes but is not limited
to 319MHz sensors from the following manufacturers:
- UTC® / Interlogix® / ITI®
- Qolsys
- Cinch Systems
This document provides guidelines for configuring and using the RBM101i module.
1.2. Revision History
Revision
Date
Description
1.0
June 2017
Initial release of the document
1.3. Document Conventions
Font / Icon
Meaning
Courier New
Command line input/output
Notes
Important information

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1.4. Part Numbers
Table 1 RBM101i-319 Part Numbers
Part Number
Description
RBM101i-319T
319MHz BridgeBee through hole
RBM101i-319S
319MHz BridgeBee surface mount
2. TECHNICAL SPECIFICATIONS
2.1. General Specifications
The following table provides the general specifications for the RBM101i.
Table 2 RBM101i General Specifications
Specification
Value
Operating Frequency
319.508MHz
Channels
1 (channel 0)
Form factor
Standard BridgeBee™
Operating temp
-40 to 85° C
Antenna options
SMA, U.FL, wire whip
2.2. Power Requirements
The following table provides the power requirements for the RBM101.
Table 3 Power Requirements
Specification
Value
Supply voltage
2.7-3.6V
Receive / idle current

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2.3. Pin Signals
The following table shows the pin assignments for the RBM101i.
Table 4 Pin Assignments
Pin
Name
Direction
Function
1
Vcc
-
Power supply
2
UART_TX
Out
UART data out
3
UART_RX
In
UART data in
4
N/C
-
Not connected
5
nReset
In
Device is reset when held low
6
N/C
-
Not connected
7
N/C
-
Not connected
8
N/C
-
Not connected
9
N/C
-
Not connected
10
GND
-
Ground
11
N/C
-
Not connected
12
N/C
-
Not connected
13
N/C
-
Not connected
14
N/C
-
Not connected
15
N/C
-
Not connected
16
N/C
-
Not connected
17
N/C
-
Not connected
18
N/C
-
Not connected
19
N/C
-
Not connected
20
N/C
-
Not connected

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3. SERIAL COMMANDS
The Radio Bridge modules utilize the UART serial port for communicating payload data between
modules and for configuration of the modules themselves.
The serial port runs with these default settings.
Table 5 Port Default Settings
Name
Default Setting
Baud Rate
9600
Stop Bits
1
Parity
None
The baud rate can be changed using the BD AT command as defined in the AT Commands section.
All values through the serial command interface are coded as ASCII characters. In other words,
the hex value 0x12 would be coded as the ASCII string “12” which allows for convenient control
through a terminal emulator. Host processors communicating to the module through a UART
must convert values to ASCII-coded values.
3.1. Commands to the Module
Every command to the module starts with the ASCII characters “AT” which stand for
“attention” as shown in the following command structure.
Table 6 Command Structure
“AT” Prefix
ASCII Command
Parameters (if necessary)
Carriage Return 0x0D
2 bytes
2 bytes
0-n bytes
1 byte
These “AT” commands are defined in AT Command Reference section.
3.2. Messages from the Module
The messages from the device do not have an “AT” prefix but have the following structure.
Table 7 Message Structure
Message Type
Space 0x20
Message
Carriage Return 0x0D
3 bytes
1 byte
2-n bytes
1 byte
The message types are one of the following ASCII-coded values:

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•“CMD”: Command Response
•“ERR”: Error Message
•“STA”: Status Message
•“SEN”: Sensor Payload
3.2.1. “CMD”: Command Response
Response from a previous AT command. For example, for AT commands that set valid
parameters the host would expect the response:
CMD OK
If the AT command is requesting the firmware version which happens to be v1.01 the
response would be:
CMD 0101
3.2.2. “ERR”: Error Message
This is an error message from the module that sends a 4-digit error code as ASCII coded hex
characters. For instance, error code 0x0000 would be represented by:
ERR 0000
See the Error Messages section for more detail.
3.2.3. “STA”: Status Message
This is general status message from the module that sends a 4-digit status code as ASCII coded
hex characters. For instance, status message 0x0000 would be represented by:
STA 0000
Note that status messages do not include errors. For errors see the message
type Error Message. See the Status Messages section for more detail.

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3.2.4. “SEN”: Sensor Message
The SEN message is sent whenever the module receives a sensor event. The payload of the
message is defined as follows.
Table 8 Message Payload
Sensor
ID
Space
0x20
Message
Count
Space
0x20
Low
Battery
Space
0x20
Device
Type
Space
0x20
Sensor
Status
Carriage
Return
0x0D
6 bytes
1 byte
1 bytes
1 byte
1 byte
1 byte
1 byte
1 byte
3 bytes
1 byte
Sensor ID: This is the unique 24-bit sensor ID that is usually printed on a sticker on the
enclosure of the sensor
Message Count: With every new sensor event, this field increments from 0 to 6 or 7 and then
rolls back to 0. This counter allows the user to determine if any sensor events were missed or
arrived out of order.
Low Battery: 1 if the battery is low, 0 normally
Device Type: This byte represents the sensor type and will define how to interpret the sensor
status bits
Sensor Status: These bits represent the sensor event as defined by the device type. See the
section on Sensor Event Messages for more detail.

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3.3. AT Command Reference
This section defines the serial AT commands that can be sent to the module.
3.3.1. AT Commands
All AT commands begin with an ASCII “AT”, followed by a two ASCII character command, and
followed by optional parameters depending on the command. The prefix “AT” can be used
standalone to determine if a device is available, out of reset, boot-loading complete and
responding. Upon sending “AT” with no additional command or payload, the device should
respond “CMD OK” if it is alive. This command may be used during a system boot-loading
process where a bootloader delay is used to determine if the device is ready.
3.3.1.1 AT –Attention
This is the basic standalone command to determine if a device is available, out of reset, boot-
loading complete and responding. Upon sending “AT” with no additional command or
payload, the device should respond “CMD OK” if it is alive. This command may be used during
a system boot-loading process where a bootloader delay is used to determine if the device is
ready.
3.3.1.2 WR –Write Configuration
Writes current configuration to non-volatile memory and loaded automatically after next
reset.
3.3.1.3 RE –Restore Parameters
Restore parameters to factory reset defaults. However, the default values are not written to
flash.
3.3.1.4 FR –Factory Reset
Factory reset the device. Resets all parameters and clears non-volatile memory and writes the
defaults to flash.