Here is an example diagram with:

• Heltec Wi-Fi Kit 32
• Latvia Assembly
• DS18B20 temperature sensor
• ESP01
• TTL to RS485 converter
• Meter SDM220/230

It is very important to select for the assembly only the components necessary for the way of working that we want to implement.

It is not necessary to assemble all the components of the diagram, although it is possible to do the complete assembly if you want to try all the modes.