GPIO low
ojvillar opened this issue · comments
how to make nodemcu esp8266 GPIO LOW
Hey there ...
got the same problem ... i set the output D1 and D2 to low, but when i boot my NodeMCU
this GPIO Pins are high. I can reproduce that also with D3 and D4 ... when i edit the GPIOs in
my config file.
What can i do?
The readme file is really not describing it well, please fix.
Basically when the esp boots up i.e. power on or reset, then it reads the GPIO-00 pin. If the pin is LOW then the esp goes into listening mode awaiting a firmware update.
That all happens before any of your programs run. This can only be done with a wire connected to the GPIO-00 pin bridging it to Ground on boot or reset.
- Connect a wire bridging GPIO-00 to ground (on a wemos board this is pin D3)
- While the wire is connected power the esp on on or reset it, either way.
- Now click the Flash button in the nodemcu-flasher and watch the progress bar as your esp is getting its firmware updated.
Hope this helps.