I uploaded the first sketch to arduino, the 4 relays should be turned on and off every second, but nothing happened. What did I miss?
niu.yixuan 2024-07-12 15:04:05 6 Views0 Replies I uploaded the first sketch to arduino, the 4 relays should be turned on and off every second, but nothing happened. What did I miss?
2024-07-12 15:04:05 It needs an external power supply to drive the xbee module and relays. Suggested: 7-12V. 
niu.yixuan
niu.yixuan 
