Hi,
I am trying to use esp32 board with Arduino IOT Cloud.
What I observed is if I connect the esp32 board with laptop using usb cable , it works properly and I can control GPIO pins successfully (I am using relays at output).
However if I disconnect esp32 board from laptop, and provide power externally , it does not work . Even if change the switch status from dashboard, esp32 does not change the pins status.
Could you please help ?
Which ESP32 model are you using and what are the connections with the external power and relays?
Is the ESP32 device actually correctly powering up and connecting to the cloud? I know some issues I've had were related to the power supplied to the unit, too much mA, etc.
It worked !!
Thanks guys for taking a look into this issue .
Eventually the issue was with power provided to esp32.
Somehow the breadboard was faulty and causing voltage drop. I was supplying 5 V power through vin pin of esp32 (38 pins module) connected on breadboard. when I measured the voltage across vin and gnd it was below 4.5 volts and that was causing issue .
I changed the breadboard and voltage was near 5 V and all worked!!!
I always check power supplied to the devices but this time never thought a breadboard also can cause serious issues.
learning from this issue "Always always pay attention towards power supplied to the devices no matter what" 
This topic was automatically closed 120 days after the last reply. New replies are no longer allowed.