ESP8266 Community Forum

- Tue Apr 21, 2015 2:15 pm #15226 I have exactly the same problem with ESP-01. Created a PCB with proper grounding (top layer is mostly ground). As soon as I connect a load to the relay, it randomly resets. I'm almost sure it's external interference either on the RST pin and/or VCC. After removing the RST pin from the header and soldering a 1K resistor (VCC - RST) and a 100nF capacitor (RST - GND) it got a little better but occasionally still have resets. I have spent already a lot of time on this and still have no clue what is going on here.

- Wed Apr 22, 2015 9:57 am #15287 Another to consider is the control pin (gpio), try to isolate it from the relay by using optoisolator.
I also face this reset issue and now I'm considering using a solid state relay (zero crossing).

- Wed Apr 22, 2015 2:09 pm #15309 I noticed that the wire on the ESP-01 that connects the RST pin to the ESP chip runs at the side of the board. As removing the header pin already gave me better results, I'm going to try to solder a 100nf capacitor as close to the chip as possible and cut the wire to the header. Hope this will help

- Wed Apr 22, 2015 4:19 pm #15317 I've officially given up. Having got the scope out i could not find any foul play anywhere.

I've switched all my relays to Sold State ones, and that is what i'll do for future projects.

There are some 8A sold state relays by sharp, ill either have to build my own module board or hopefully they can be made into one, compete with transistor, and snubber!

I suspect as people move from getting code right, into building things that this problem is going to get bigger and bigger.