- Thu Jul 16, 2015 11:52 am
#23438
Actually, when the button is pressed it boots up. When GPIO2 is between + and -. If you cannot boot with the pin connected to ground - you need to connect it to the power source, but then it will always stay HIGH whether you press the button or not. And if you connect it to a place on breadboard where it won't be pulled to - or +, but high when the button is pressed - it will also stay high when the button is not pressed. So how do I set it up to boot and function correctly?
- Thu Jul 16, 2015 12:18 pm
#23440
I'm not understanding exactly what you wish to do ...
The GPIO2 needs to be HIGH at Reset/PowerUp for normal boot.
If you wish that your software do something different when button is pressed, don't press button at power up but simply after, for example, during the first 5 seconds following the normal boot.
EDIT : I've look back to your wiring diagram, I see that the button is at VCC and there is a PullDown to GND. It should be reversed instead : PullUp to VCC and button to GND.
The GPIO2 needs to be HIGH at Reset/PowerUp for normal boot.
If you wish that your software do something different when button is pressed, don't press button at power up but simply after, for example, during the first 5 seconds following the normal boot.
EDIT : I've look back to your wiring diagram, I see that the button is at VCC and there is a PullDown to GND. It should be reversed instead : PullUp to VCC and button to GND.
- Fri Jul 17, 2015 11:13 am
#23509
Nope ! In your latest drawing you are actually shorting the GPIO to VCC.
Simply switch resistor and button on your original diagram, making the button connected to GND and the resistor to VCC, acting as a PullUp.
Simply switch resistor and button on your original diagram, making the button connected to GND and the resistor to VCC, acting as a PullUp.
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