ESP8266 Community Forum

Hey guys,

I hope i'm in the right section of the forum. I've been googling for days and haven't found an answer to help me use this board I bought.

I've been playing around with arduinos for a few months now, and even connected them to internet using the esp8266-01 following some tutorials without a problem. So I wanted to control a relay and radio transmitter with this NodeMCU board I bought a few days ago to avoid using the arduino plus the esp8266 01 and just one board to do the job. I found some tutorials on how to program codes to the board using the Arduino IDE, but I haven't been able to communicate with the board. All I get is a blue led constantly on, nothing changes no matter what I do, I tried powering with the usb micro cable, direct 5v input to the Vin pin and regulated 3.3v to the respective pins and all I get every time is that one blue LED constantly on.

I use mac and also tried flashing a new firmware using pyserial and esptool but no luck there either.

I've downloaded the recommended driver and boards to use with the arduino ide, but nothing.

Any suggestions before I give up and try buying another one?

This is the board I have:


This is it with the blue LED on. No other LED flashes or anything, never.


Thanks for your time!

Did you install the drivers for the board?

If yes, then drop to terminal and type "ls /dev/cu*", if you dont see it there as a usb-serial device, you've probably got the wrong driver.

scrumfled wrote:Did you install the drivers for the board?

If yes, then drop to terminal and type "ls /dev/cu*", if you dont see it there as a usb-serial device, you've probably got the wrong driver.

Yes I did, and in fact I can see it properly when I plug it into the computer. But I'm still not able to do anything with it...

Thanks for your time!

Open up serial monitor, then disconnect/reconnect the board. do you see a burst of characters?

If yes, try setting the board to 76800.