ESP8266 Community Forum

- Sun Apr 10, 2016 7:48 am #45221

It is no problem, if the Reset pin is HIGH all the time?

No problem, as long as it is not left floating.

I see in the datasheet, that GPIO0 is a I²C pin (i don't understand why they make a pin which is used to determine the boot variant a important bus pin).

Espressif never mentioned that GPIO0 is an I2C pin, it is only mentioned that GPIO2/GPIO14 can be use for software driven I2C bus, but in fact any GPIOs can do that, since it is software driven. (But personally, I choose GPIO2/GPIO0, because it is a perfect fit with the pullups requirement)

- Tue Apr 12, 2016 1:16 pm #45375 Okay, thanks for your answer. I made another change to my schematic because i got the information that this will also function properly like that?

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- Sun Apr 17, 2016 1:29 pm #45646 I made another update. Can someone confirm if this will work?

https://www.docdroid.net/C4tbSoI/schema ... 6.pdf.html

- Sun Apr 17, 2016 4:55 pm #45656 Hi, a quick glance all looks good. If you ever want to use deep sleep you will need a 1k between CH_PD & GPIO 16, that will be fine with all the other valuse you have on the board as is. Try and get a good sized pad on the tab of the AS1117 - both sides with some through holes if you can. Off hand they are good up to 125 deg C but you realy don't want anything hot on your board, so the bigger the pad the better the heat dissipation.
I messed up on that, the AS1117 was ok but it killed the caps next to it. Sorry if the comments seem to go on for ever.