Input pull-up GPIO18 & GPIO19 pins

Other Hardware 3rd Party Boards
1

Hi,

I am using USB CDC boot on ESP-C3-13 module and connecting to my notebook via USB interface. When I push boot button my notebook is able to see COM port and able to download program successfully into module. After I reset module USB connection drops normally, but Windows create a notification with an "USB Device Not Recognized" error. While figuring out the problem I found out that I set GPIO18 andGPIO19 pins to INPUT_PULLUP. After I remark those lines USB device is able to find by notebook.

pinMode(18, INPUT_PULLUP); 
pinMode(19, INPUT_PULLUP);

Is it not permitted to set GPIO18 and 19 to INPUT_PULLUP while using USB CDC scenario?

Thank you for your helps,
Orkun Gedik

2

Not permitted :slight_smile:

3

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.