Arduino-Example

Arduino Version

This is an example sketch which uses an Arduino nano and can be adapted to an Arduino Uno. Once you get this working and want to have a go at doing more with the data, have a look at my setup for inspiration!

Please note that there is no MQTT-enabled Arduino version as these boards have no integrated way of communicating the data over the network like the RaspberryPi and ESP modules do.

Libraries

The libraries this project uses are:

• https://github.com/4-20ma/ModbusMaster
• https://github.com/bblanchon/ArduinoJson

Hardware

• 1 x Arduino Nano or Arduino Uno
• 1 x RS232 transceiver module. Ex: MAX3232 Module
• 1 x 6P6C Straight Cable (Double check wire colors against 6P6C-Connector.jpg)

Wiring

See the schematic or other photos in this directory for details.