Please bear with me since am a noob in electronics. I made a relay module based on internet DIY [tutorials](https://images.app.goo.gl/WEwRyWRU68xg8TjK6).[![DIY Tutorial](https://i.stack.imgur.com/JG5ai.png)](https://i.stack.imgur.com/JG5ai.png) It turns on when I provide 5V from adapter to both +5V and signal but when I supply high of NodeMCU to signal pin it doesn't work. Any suggestions what is wrong with module I created?

Also want to check if this sketch is using optocoupler correctly. I have no clue :(

Relay used <https://sharvielectronics.com/product/spdt-5v-30a-relay-pcb-mount/>