Device ID | JemRF Documentation

This page describes the Device ID and how to change it.

The Device ID is a two character unique identifier for each device. The ID is appended to each radio message so that the receiver of the message can determine which sensor sent the message. The Device ID is also used to address a device when sending a command. When a device receives a message (whether it arrives through the serial port or over the radio) the device compares the Device ID of the in-coming message to its own Device ID. If there is a match then the device will action the command.

Note: You can use numerics as well as alphabet characters 0-9, b-z, A-Z in the Device ID which gives a total possible 3,721 unique ID’s. If you need more ID’s then have a look at the PANID setting.

Message ID Default Settings

The standard Device ID of a IoT Gateway is 01 and the standard Device ID of sensors is a random number between 01 and 99.

How to change the Device ID

The Device ID can be changed using the CHDEVID command.

Command: CHDEVID[p1]
Response: CHDEVID[p1]

Where: p1 = The new two character ID

The below example changes the Device ID from 03 to 05:

python rf_config.py 03 CHDEVID05
SENT     : 03CHDEVID05
RECEIVED : 03CHDEVID05

Note: We suggest you use alphanumeric characters only. Although the devices will support ASCII codes 32-122, the supporting interface applications may not handle non-alphanumeric characters very well.