ESP8266 Community Forum

I've tried the SSR. And it works.. In fact, when i connect it normally when the esp is already started all works great.
i'm connected to the GPIO2.

Now, inverting the GND and GPIO2 pin (anode and catode) it doesn't work, either with the esp already powered or everything booting together.



I've done a kind of test using just a 3V battery and the SSR, nothing else. Connecting the + and - in the right way with the battery the relay turns ON. Inverting Anode and catode the relay doesn't turn on. Am i missing something?

You mentioned that you still connecting the SSR to GND, this is the mistake.
Look again at SINK connection, there is no GND in the picture.
The anode is at VCC and cathode to GPIO2.

Ahhh!

Thanks! now all seems to work great!

I'm grateful!

You're welcome !