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GPIO pins HIGH on startup

PostPosted: Sun Jun 14, 2015 6:24 am
by ion.dulgheru
On both ESP-02 and ESP-07, which use NodeMCU, GPIO pins are set to HIGH at startup, and I have problems using it with a relay, for a remote switch.
Any solution for this? I have problems with the power grid in that area, and every time the power is back on, a signal is sent to the relay by the ESP module.

Re: GPIO pins HIGH on startup

PostPosted: Thu Jun 18, 2015 4:23 am
by tytower
Why? Pin high to relay -relay to high - No current
Pin low sinks current up to 40 mA I think . Would that work?
Otherwise maybe an inverter on pin so that out is low when pin high etc