KY-004 37-1 Key switch module
Hardware connection- Pin S Signal - PinIn = 2
- Pin middel VCC +3V3
- Pin - Ground
The ESP8266Basic program
' TestKY004' This TestPinIn.bas
' Program to test the value of PinIn and display it
PinIn = 2
timer 1000 , [NewVal]
wait
[NewVal]
cls
msg$ = "<head><meta http-equiv='refresh' content='1'></head><H1>TestPinInn</H1>" & time() & " Pin ( " & PinIn & " ) = " & io( pi , PinIn )
html htmlvar( msg$ )
returngui
wait
end
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEi400BzRf0YsVXo8NmIWNCxLx-fQ0-EkHpTpXE3jgVaCoioal58PgWgmE3VR-U0wd6iDdZAFBnRi23HC2ZeLlosaAdsQNTOf3ARhTnSWyZ9eTH9_9FO-PMKRlYtdN78eMqmTNxVn4UwY2yv/s200/2016_KY004_BACKe.jpg)
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhfqd-c92fSvTAiIpd_j80qNwhNLX_idR9Ol_6hYBOXo4N0z6gn82nQuQre4qIz5hT6CR_eFe6ytla360nldV44etgmHGzGAe3S5BU-ub1o-sOw6wB0W7vMlFfLgzLqKB6VtwQdkwH3l4_9/s200/2016_KY004_TOPe.jpg)
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