costaud wrote:I think you can connect a oscilloscope to check the voltage of the 5V pin.
When RF circuit is working, it might take more current.

I checked in my multimeter and in all cables it hovers between 4.6V and 4.7V

The fact that you have brownouts indicates that you have a power supply setup that has voltage sag when some current is drawn, possibly because of thin USB cables. This may also affect the output of your dust sensor. Can you try to see if supplying external voltage to the board, e.g. by using a lab...

I tried without wifi and BLE on but the same issue. Brownout issue is another issue I am facing but not that frequent but when that happens device goes to a reboot loop.

Hello, I have a dust sensor from Honeywell [https://sensing.honeywell.com/honeywell-sensing-hpm-series-particle-sensors-datasheet-32322550-e-en.pdf][ and which is connected to Vin(5v) of esp32 dev board. The problem I am facing is sensor throwing different values when I change USB cable which I use ...