ESP8266 Community Forum

I'm using SPI with a BME280 sensor on an ESP8266MOD. A sample ino works with an Arduino Uno and the BME, but when I move everything over to the ESP8266, the ino compiles but cannot be loaded. If I pull the power pin, the Arduino IDE can connect and load the program, but, alas, it doesn't work when the power pin is reconnected.

I'm puzzled because the ESP works fine with a TFT ST7735 with micro SD, which I would think would be a bigger power draw.

Any help is greatly appreciated! PS. I'm using the VIN pin on the ESP.

Turns out I needed to add a pull-down resister for the CS pin. When I did so, everything worked properly. This link also provided guidance:

https://randomnerdtutorials.com/esp8266 ... nce-gpios/