Everyone, we have finally completed the Bing feeder using RS485 bus communication. Currently it performs well, is no longer restricted by cables, has become more convenient, and can freely modify the address and the number of steps to advance.
Please download the V485 documentation at this link.
Open-source documentation(Please do not manufacture them for sale).
If you are upgrading from V3, you need to take the following steps.
1. Reprint some 3D-printed parts.
2. Replace the feeder PCBA. The new PCBA uses SH1.0 connectors. Therefore, you also need to replace the original MX1.25 cables.
3. Replace with a new ESP32-C3 feeder controller.
4. If you like, you can use a pair of ESP32-C3 modules as the transmitter and receiver. This way, you can control all the feeders within 10 meters.