Hello everyone. I purchased 2 esp32 Wifi Kit 32 from Amazon. First item work fine while second device with plastic support and 4 screw for fixing oled display have one problem that occurs when PIN 21 is OUTPUT and HIGHT because the display lowers the brightness . I suspect that the screw near PIN 21 (not present in the first hardware version) is the cause of the bug. Have any of you encountered the same bug?
WiFi Kit32 pin 21 problem
The GPIO21 pin is Vext, which affects the operation of peripheral devices.
Plz refer to:
https://docs.heltec.cn/#/en/user_manual/the_upgrade_of_wifi_lora_32_v2_compare_with_v1