NodeMCU MQTT Relay keep swith ON When restart

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@marcx.han

I need help with sample MQTT sketch code for 4ch relay because my codes keep turning relay ON when device restart or reboot so i have manualy switch off from app side.

Hi @marcx.han

Which board are you using?
I found a workaround to this: Storing the last value to EEPROM, so when the device restarts, it reads the previously stored value. The last replies of this post might help (that’s how I did it with a NodeMCU Esp8266 )

ESP8266 : using syncAll() function

Hey! I’ve been tinkering with storing the actuator state to the ESP’s EEPROM, so in case the power goes out, the ESP restarts etc, we can load the value from there, and send this values through MQTT to Cayenne. I must admit at first I was a bit scared and intimidated, but it’s actually fairly easy and quite straight forward (at least something simple as storing a state [0 or 1]) I’ve followed an amazing and in-depth tutorial Tech Note 015 How to Use ESP8266 EEPROM [Tech Note 015 - Ho…

Cheers!
Marc