Running ESP8266 without Arduino IDE connection (USB)
Posted: Thu Apr 16, 2020 9:26 am
Hi, I'm a very new ESP8266 NodeMcu user. I already made some small projects (measuring solar cell output voltage and BMP280 sensor with MQTT link to RaspberryPi). So far so good, as long as I upload my code via USB and the Arduino IDE. I thought that when disconnecting the USB and hook up an external power supply (3.3V) it would work on its own...but nothing happens (and even already blew up one module ). I read a lot about boot modes and pulling up/down some GPIO pins but no luck this far. Some say to pull GPIOO (D3) up to 3.3V...but this pin is currently used for SPI connection towards the BMP280 sensor.
Any suggestions? Thanks in advance.
Any suggestions? Thanks in advance.