Hello,
I am looking to switch out one of my mechanical relays for an SSR to kill the power to the AC side of my LEDs power supply (esp has it’s own power). Can anyone tell me if the IO data out goes to the + or the - on the DC Input side of the SSR? Thanks.
This is the SSR: https://www.amazon.com/gp/product/B0BD55LGX7
You can wire it either way, WLED lets you config the polarity of the relay (labelled “Invert” on the config page).
The SSR requires - to GND and the + to 3-32V.
Easiest for the ESP32 is wire the GPIO to + and tie - to GND.
Depending on the SSR, you might end up needing a levelshifter of driving transistor.
It’s possible the ESP32 won’t bring the voltage up high enough and/or supply enough current for reliable operation.
You could certainly give it a try without.
Thanks. That was my plan, to hook the + to the GPIO pin. Just wanted to make sure. I already have a level shifter on board that I can tie into if needed. Had a few issues last winter when the mechanical relay would not work on real cold days. Granted it was in a box sitting on my dock with like 100% humidity lol.
Oh c’mon, just fill the box with silicon grease and you’ll be fine. 
