ESP WEB SERVER – Control Multiple Outputs

Q&A Forum › Category: ESP8266 › ESP WEB SERVER – Control Multiple Outputs

Bob Dehn asked 4 weeks ago

When I built the Control multiple output project, I was able to get the project to work, however, my outputs on the webpage are opposite than the state of the GPIO state.
The website shows the output as off when the LEDs are lit. and when I set the switch to on the led goes off.
Advice on correcting this issue would be appreciated.

Thanks

9 Answers

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Sara Santos Staff answered 3 weeks ago

Hi.
Can you tell me the exact project that you are following and which GPIOs you are trying to control?
Regards,
Sara

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Bob Dehn answered 3 weeks ago

2.2 – Web Server – Control Multiple
Outputs (Toggle Switches)

Controlling 4 LEDs

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Sara Santos Staff answered 3 weeks ago

Does that happen with all GPIOs?

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Sara Santos Staff answered 3 weeks ago

I have just tested the code provided in the project folder and everything is working as expected.
What is the ESP8266 board that you are using?
Regards,
Sara

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Bob Dehn answered 3 weeks ago

Yes, all GPIO pins are affected. The image on page 226 of the book shows the problem. I have included the image here. All switches on the website show state of off when the LEDs are lit. and when the switches are changed the LEDs go off the switched state is ON/

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Bob Dehn answered 3 weeks ago

I am using NedeMCU esp8266. Images in the book also demonstrate the issue. The switches say “Off” but the LED is on. This seems backward.

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Sara Santos Staff answered 3 weeks ago

Hi.
I’m sorry but I don’t understand…
When the button is red, it means that the LED is on. If you click on the red button, it will change color to gray and send the command to turn off the LED.
Maybe the image is a bit confusing.
However, the example works fine for me. Watch the video:

https://bit.ly/3pnnO1U

Does your circuit works like this too?
Regards,
Sara

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Bob Dehn answered 3 weeks ago

Ok, I have watched the video. The operation of the circuit in the video is what I would expect the circuit to operate. My circuit does not operate in the same manner. the status of the switches are OFF and the LED’s are on. when the LED’s are opff the Switches are on. Your circuit is operating correctly. Mine is backwards.

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Sara Santos Staff answered 3 weeks ago

That’s really weird.
I guess it must be something related with your board.
To make it operate properly for you, you’ll have to switch the 1 with the 0 in the requests.
Regards,
Sara