ESP8266 Community Forum

- Mon Jul 16, 2018 5:07 am #77077 Hi,
i have a D1 Wemos mini 12E and have a few set up around the house including my bedroom to read temperature. The problem is that the blue onboard TX Led flashes upon transmit, which is really annoying in the bedroom when your trying to sleep.

Can anyone help out as to how to turn off the Blue TX onboard LED?

thanks for your help!

- Sat Mar 02, 2019 3:30 am #80880 Hi... did you manage to do this?

- Mon Mar 04, 2019 4:36 am #80903 The only solution is to not use GPIO1 in your sketch.

The TX LED is hardwired to the TX-port (= GPIO1), so you either have to not use that GPIO or remove the LED from the board with a soldering iron.

If you're not using GPIO1 in your design, you must have enabled serial (for debugging?): stop writing stuff to the serial port.

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

- Mon Mar 04, 2019 9:53 am #80907

Can anyone help out as to how to turn off the Blue TX onboard LED?

Cover it with black tape or black paint.