Using this M5Stack RS485T connector is easy. First, connect it to your RS485 devices following the point-to-point or one-point-to-multipoint connection method. You can identify if it's powered on by looking at the POWER LED. When connecting, make sure to match the 4-pin HT3.96 terminal connector correctly. As for maintenance, keep it in a dry and clean place. Avoid exposing it to extreme temperatures or moisture. If you notice any issues, check the connections first. It's compatible with many M5 products, so you can use it with confidence in your projects.