53
MessengerBLE
User Guide
9.8
Serial Port Configuration – Type 6
The Messenger has 6 serial ports (1-6).
Port 1 is dedicated to the on-board cellular modem.
CAUTION
Do not modify the parameters of Port 1.
Port 2 is dedicated to the debug function. It is only available via an internal
connection and requires a TTL->RS232 converter.
Port 3 is dedicated to communications with the internal Bluetooth processor.
Port 4 is dedicated to communications with the internal GPS module.
Port 5 is user port 1, available as RS485 only.
Port 6 is user port 2, available as RS485 only.
CAUTION
Not all parameters shown below apply to every port.
Parameters for Serial Port Configuration
Parameter
Code
Reference
Description
Default
1
Enable
Use to enable/disable the port
Port
Specific
0 = disables
1 = enables
1
Mode
Defines the port function
Port
Specific
Range 0 – 2
0 = none
1 = MODBUS RTU Master
2 = MODBUS RTU Slave
3
Modbus
Slave ID
This sets the Slave ID of the unit when
port mode is set to MODBUS RTU Slave.
126
Range 1 - 247
4
Baud
Defines the port baud rate.
57600
Valid baud rates:
1200
2400
4800
9600
19200