I want to connect a sensor to this lora board (RoLa Lora Radio Node containing Atmega328P as microcontroller) through MAX485 to transfer a RS485 data from a soil sensor. The sensor seems remains unconnected if i use pins D5-D8 or D3-D4. The D2 pin already used by the Lora 1278. When I use an Esp32 or Arduino Nano the sensor and MAX485 works
Please contact your RS485 sensor vendor to get support on it, but did you checked that you are using the correct RS485 address and RS485 protocol (ASCII vs RTU) ?
why are you directing me? if you dont have an answer then mind your business please.