5V Relay Not Responding To Wemos D1 R1 ESP8266

Projects Networking, Protocols, and Devices
1

Hello everyone
I'm having some trouble connecting my 5V Relay to the Wemos D1 board.
Basically I want to make the relay to switch on and off a lamp, but the problem is that it doesn't respond to the code I written. HERE IS MY CODE.
Also I don't know if I'm using the right pin and the correct pin reference in the code, and when I connect the signal wire(the green one) to the D10 pin, the green light on relay turns on so the relay must be functional.
In the attachments there is a picture of the kit when it's up and running and programmed using the code above.

By the way I am able to turn the built-in LED on and off using WiFi so the board seems to be fine.

Thanks for your help.

---UPDATE---
I tried a much simpler way, I connected a kit of 6 LEDs (3V) and this time I used the D8 pin to turn on and off the LEDs.
I tested two scenarios, at first I started the Wemos without any code or program just to see if the light turn on, and as expected they didn't.
Second time I used -pinMode(0, OUTPUT)- in setup method and ran the code, this time the lights turned on.
But in continue when I tried to turn off the LEDs by -digitalWrite(0, LOW)- command nothing happened.
Any suggestions?

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2

Instead of connecting the red relay board wire to 5v, try connecting it to VIN to see if that will work. The 5v pin probably cannot supply enough current to operate the relay.

3

No it didn't work
By the way the relay is a 5V one, shouldn't 5 volts be enough?

4

"By the way the relay is a 5V one, shouldn't 5 volts be enough?"

The pin has to supply sufficient "current" to operate the relay. You might do some basic trouble shooting with a multimeter to see if the pins are actually trying to supply current to the relay.

5

I tested it with the D10 pin and when I insert the signal wire, relay clicks and the lamp turns on and when I disconnect the wire it goes off. So the voltage is sufficient to operate the relay but when I try to digitalWrite the D10 pin to turn on and off it doesn't respond.