ESP8266 Community Forum

- Wed Nov 25, 2015 11:04 am #34968 I think I can just do something like this then, for GPIO0 ?



The only thing is that it seems a bit strange because when I put the jumper in to pull GPIO0 to ground, it would still be technically connected to VCC also (through the 4k7 resistor). Do i need to add a second jumper so that I can connect GPIO0 the the pull up resistor when I'm in "run" mode, and then when I want to program the thing I would remove that jumper and move it to the GND jumper?

Thanks Martin!

- Wed Nov 25, 2015 11:13 am #34972 That is perfect ! (except that you changed by mistake the label at right of R4 from GPIO0 to VCCIN, like that you have 2 pullsup )
It is normal that the 4K7 is temporarely shorted to ground, it will draw a bit of current from VCC, but that is the role of a pullup.

- Wed Nov 25, 2015 11:17 am #34973

That is perfect ! (except that you changed by mistake the label at right of R4 from GPIO0 to VCCIN, like that you have 2 pullsup )
It is normal that the 4K7 is temporarely shorted to ground, it will draw a bit of current from VCC, but that is the role of a pullup.

Martin, sweeter words have never been spoken! Thank you!

Also, thanks for catching the name switch - I had sworn I had changed the name to VCCIN (for the connection I wanted), but it didn't seem to "stick" - turns out i must have changed the wrong wire!

Thank you again!

- Wed Nov 25, 2015 11:24 am #34974 Hi, just a quick check - what are you connecting the GPIOs to? This could affect things.