My project requires the TMP 117 temperature sensor, RV-8803 RTC, 2 single channel Qwiic relays, and a 20x4 Qwiic LCD. MY project works great until I connect the relays (1 or both). I’m using Qwiic cables to daisy chain. My code either fails to upload or uploads and hangs up when it gets to the code to control the relays. Simple code, nothing crazy. I cut the tracing for the pullup resistors on the relays. No difference. I’ve tried configuring the sensors in a different order in the daisy chain. Still the same. I’m using the Nano 33 for a IOT purpose using Wifi. The relays have addresses 18 and 19. The relays work fine with the example code by themselves. Should I connect an external 3.3 v supply to each relay? This one has me confused. Thanks.
Did you ever resolve this issue? I’m having some issues with Qwiic single relays as well.