ESP32 Forum

Hello,
I am trying to get Bluetooth working and not getting very far. The example code all of the net is the same. When my devices reboot every time connect is called.


Have any of you seen this behavior. Bluetooth is kind of what led me to the ESP32 in the first place, it would be a bummer to not be able to use it.

If you are using this library, then better is to open issue on github.
https://github.com/nkolban/esp32-snippets

I got these reboot with 2 differents esp32 dev board using either Arduino or ESP32 IDF script.

If your ESP32 device work fine without BT you might have a power problem.
BT required more current.. then voltage get down below a threshold that trigger a software protection that trigger a reboot.
I received a msg 'Brownout detector was triggered' at each reboot.

I solved the problem by adding an electrolytic capacitor of 1000 micro Farads (16v) between Vin pin (5v input) and Gnd.
I also add an electrolytic capacitor of 47 micro Farads (16v) between 3v3 pin and Gnd, you can use a 100 microFarads also.
Put the capacitor respecting polarities.
????
When I used only WiFi, it runs OK but when I used BT only I got Brownout.
It is paradoxal that BT use more current then WiFi ??