i2c potential hang issue

[RfidResearchGroup]

From: iceman1001/proxmark3#247
Sometime it is useful to be able to unhang the i2c. Normally would be unplug pm3 but that is a too blunt method to use.

Link to suggested code that deals with a hung i2c.
https://github.com/merlokk/SmartHome/blob/master/ESP8266CO2PM25/ESP8266CO2PM25.ino#L75

@cjbrigato any takers on this?

[TomHarkness]

Friend of mine is looking in to it right now. @SydneyMakers

[RfidResearchGroup]

Great!

[cjbrigato]

See attached issue, will also make my way through this one this weekend

[iceman1001]

@merlokk Its better you answer in this thread than over at the iceman fork repo where I posted.

[merlokk]

yes)
hi) it may be problem... in some rare cases but....
ill fix it in near future after end fido part.

[merlokk]

close? e4cb74f

[RfidResearchGroup]

well, that PR is my test.. I am not sure it works.

[merlokk]

by code it should work.
if you have proxmark wo i2c module...
it needs a resistor to ground on any i2c pin to check if it works