ESP8266 Community Forum

Hi,
i was just playing a little bit around with the deep sleep function and now my module is sleeping very deep and I can't flash it anymore. I think its normal that I can't flash it while it is sleeping, but how do I get it in a mode again to flash it? My test application is not running long enough to flash it.

Any ideas?

Thanks

remove the direkt link between rst and gpio16.
If you use a resistor, replace it with a higher one (2k2) or even better, a small signal schottky diode (cathode to gpio16).

schufti wrote:remove the direkt link between rst and gpio16.
If you use a resistor, replace it with a higher one (2k2) or even better, a small signal schottky diode (cathode to gpio16).

Hi schufti, thanks for the fast reply. Unfortunately I dont have an direct link between RST and GPIO16, neither do I use a resistor (afaik). I am using the ESP8266 NodeMCU board with Arduino. Actually I have an RST and Flash button, but it didnt get them to work.

Thanks.

If you don't have any resistor or diode, the deepSleep wakeup will not work.
You should use RES + GPIO0 to enter in upload mode.
If this doesn't work, you must have a wiring problem.
Do you have GPIO2/GPIO0 pulled-up while GPIO15 pulled-down ?
Do you have CG_PD pulled-up ?