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PaulStoffregen / CapacitiveSensor

Detect touch or proximity by capacitve sensing
http://www.pjrc.com/teensy/td_libs_CapacitiveSensor.html
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Error -2 when using the ESP8266 #18

Open digitalLumberjack opened 7 years ago

digitalLumberjack commented 7 years ago

Hi, I just received a NodeMcu ESP8266-12 and I discovered your lib, thank you for the good work.

There are something that bother me though:

I tested with 3 different power supply, but that changed nothing.

The solution is to put a 300kohm resistor. It works really well, return 0 to 2 when nothing happen, to 5000/6000 when someone is touching the foil.

Maybe the documentation can be updated with those values.

Have fun and thanks for the lib :)

Bimblis commented 7 years ago

Is it there anyway of making it work from a distance, instead of just "by touch", using the ESP8266/NodeMCU?

Using different resistors, but all still seem to work just "by touch".

jtroberts1 commented 7 years ago

@digitalLumberjack would you mind posting your code. I can get this to work on an Arduino uno but not on my Wemos D1 mini. Any help is appreciated. Thanks

digitalLumberjack commented 7 years ago

https://gitlab.com/iot4i/firmware/blob/master/src/main.cpp only work "by touch"

javiercuellar73 commented 6 years ago

Same issue here. Would be nice to make it as sentitive as when used with UNO. I think it has something to do because internal pull-up/down resistors that comes with ESP8266.

Hi, I just received a NodeMcu ESP8266-12 and I discovered your lib, thank you for the good work.

There are something that bother me though:

  • when I run the example code, with a simple 1Mohm resistor, when nobody touches the foil, the lib returns -2 when calling .capacitiveSensor(30);
  • I touch the foil, the sensor behave normally and return So i tried with 3Mohm to see if it changes anything, but still the same.

I tested with 3 different power supply, but that changed nothing.

The solution is to put a 300kohm resistor. It works really well, return 0 to 2 when nothing happen, to 5000/6000 when someone is touching the foil.

Maybe the documentation can be updated with those values.

Have fun and thanks for the lib :)