ESP8266 Community Forum

- Mon Apr 12, 2021 6:40 am #91085 My first post here. Started with an Arduino Uno, next the Atmega and recently 2 pcs ESP8266 NodeMCU's.
Both ESP's are sending data to TingSpeak using WiFi. I'm programming the ESP's with the Arduino desktop version for Windows 10

When testing the program (connected to PC) everthing works fine. But, when using the ESP stand alone powered by an USB -adapter it takes usually 5 to 10 retries to get the program running.

What do I need to do to get the program running at power up stand-alone -using an usb-power supply?
specific GPIO high/low? coding?

- Wed Apr 14, 2021 3:13 am #91098 Uhm no, a normal 5V USB wall adapter should work, provided it can deliver enough power (>= 500mA, but preferably 1A to be certain).

Try to see if it will work with a 5V power bank, maybe your adapter is too noisy?

Assumption is the mother of all f*ckups. At least: that's what I'm assuming.