Write to register from MQTT topic

[pki791]

Hi. The readme states Allows to read and write to MODBUS registers from MQTT side with custom data conversion.

Please provide a config example how to properly allow a write from MQTT topic to modbus register. Thx

[BlackZork]

See unit tests for commands.

[xspander]

Is it possible to write multiple registers? 0x10 command

[BlackZork]

Read & write to multiple registers is not implemented yet.

[BlackZork]

Read implmented in 5de54c8.

A summary of changes:

• new way to define register lists: as register_number + count. This declaration issues single read call to modbus slave. Old way causes multiple read calls to slave.
• fixed register adressing in config file, now uses human readable format (1 is register 0x0)
• you can declare poll groups in modbus section, i.e. to pull many registers at once regardless how mqtt topics are declared.

Details in README.md, I added some unit tests for new scenarios.

[BlackZork]

Is it possible to write multiple registers? 0x10 command

@xspander Implemented in https://github.com/BlackZork/mqmgateway/commit/e13c1cf2c492a01fe1f9e84857f6a8ef3bfbd1bc. You can now specify "count" in command section.

Gateway accepts json list by default, or you can write converter that will create list of registers from published mqtt value.