Modbus — Configuration
Configuration Parameters
In addition to the GW4 configuration parameters the add-on has the following specific parameters:
Modbus Reading
| Key | Type | Default | Description |
|---|---|---|---|
modbusInternalAddress | Number | 250 | Modbus address for internal gateway sensors |
addonAccumulate | Number | 1 | Readouts to accumulate before upload (1–60) |
modbusCmdConf | String | — | Modbus interface parameters and list of commands |
loraFormat | Number | 5 | LoRaWAN payload format |
PowerOnDelay | Number | 1000 | Wait time in ms before executing commands (0–60000) |
PwrAfterBrownoutDur | Number | 0 | Seconds to power Modbus after first power-on (0–3600) |
modbusCmdConf
Specifies the interface parameters and list of Modbus requests, separated by :. Interface parameters are A (ASCII) or R (RTU), baudrate, and serial settings, separated by ,. See Modbus Config Generator for details.
Set to empty to disable Modbus functionality.
Example — RTU, 9600 baud, 8N1, two requests to device address 1, one to internal address 250:
R,9600,8N1:010300020002,010300060002,FA0400050001
loraFormat
Specifies the LoRaWAN payload format for Modbus uplinks. Introduced with firmware v1.6.0.
| Value | Format |
|---|---|
1 | Verbose |
4 | Compact with timestamp |
5 | Compact without timestamp (default) |