ModBus software works, MQTT bridge software added.

software/rs485_client_to_mqtt/README.md

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+# RS485 ModBus client to MQTT bridge
+
+Scans the configured ModBus for Mees Electronics sensors and publishes the sensor data to the configured MQTT broker.
+
+The Mees Electronics sensors are almost plug-and-play. You just have to set the sensor to a unique address and add this address to the config.yaml file. The description entry in the YAML file is only there for convenience.
+
+## Configuration
+
+Edit config.yaml.
+
+The file modbus_registers.yaml contains the Mees Electronics register definitions of the various sensors. The newest definition file can be downloaded from the git repository.
+
+## Requirements
+
+- Python3
+- minimalmodbus
+- json
+- time
+- sys
+- logging
+- os
+- pathlib
+- paho.mqtt.client
+- pyyaml
+
+## License
+
+Copyright (C) 2025  M.T. Konstapel (https://meezenest.nl/mees)
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.