TUTORIAL: How to Setup & Code A Relay - Arduino, ESP32 & ESP8266 (Part 2) Quick + Simple!

I wonder, can we use Vin pin of NodeMCU when powering it through USB?

Just a note. A new camera isn’t really the solution for audio :) a separate audio recorder like an H6 or even an H1 for that matter. Then just drop in the good audio when you edit.

hi thank you so much but I have a problem, i did everything correctly however my relay isn't clicking
what do you think is the problem

Thank You very much😄

When I add a DC device to the relay output, there is no problem. But when I add an AC device to the relay output, random texts appear on the serial port after the second command. It's as if the AC device is sending something wrong to the ESP32 and disrupting its operation. How can I fix it, any idea?

Can we use ep32 cam board for this method? Please let me know

Superb

Nice video. Very helpful.

What transistor did you use with emitter collect base ? Thanks Art , I enjoy all your videos.

did you have any an example project by using ESP8266 and RFID ?

Super project 👍