ESP8266 Community Forum

- Wed Sep 20, 2017 4:54 pm #70170 First time posting as part of this community, hopefully after getting some help from someone I will be able to help others in the future.

I am using the following ESP8266 module: https://www.amazon.com/gp/product/B01MT ... UTF8&psc=1

To program this module I am using: https://www.amazon.com/gp/product/B01J2 ... UTF8&psc=1

I have soldered a button connecting the GND and GPIO pins to put the module in programming mode. I plug the ESP8266 into the USB to Serial module. Then, I plug the USB module into my computer while holding the soldered on button for 2 seconds before releasing (putting the ESP8266 into programming mode). The red power LED is on and the whole device is recognized by my computer. When I upload a simple LED blinking sketch, a blue light on the ESP8266 blinks until the sketch is done being uploaded. However, after programming the LED that was programmed to blink does not blink. In Arduino the board selected is the SparkFun ESP8266 Thing.

If anyone can help, but needs more information please let me know.

- Thu Sep 21, 2017 1:19 pm #70199 Do you have PullUps resistors on GPIO2/GPIO0 to VCC ?
They are required ...

- Thu Sep 21, 2017 2:59 pm #70207 You didn't say what is powering the ESP so I will add, make sure you have a good 3.3V supply that is capable of 500mA peaks.

The other thing that could be a problem is that you have the wrong port number for the LED. What I would do is enable the serial port and have it do Serial.println("test"); in setup and loop. It may be working and you just can't see it.