Modbus TCP

The Gateway communicates via MQTT and publishes and listens to a number of topics.

However, in firmware 3.7.0 Modbus TCP has been added. Modbus should preferably be used on Gateways that have PSRAM like the E32 V2 and the S3/S3-LR.

See The EMS-ESP Wiki [1] for all the details on the protocol implementation.

[1]

https://emsesp.org/Modbus/