Comments on: Android App – RGB LED with Arduino and Bluetooth

By: Sara Santos

Sara Santos — Sat, 05 Apr 2025 09:29:19 +0000

Hi.

How are you connecting that second LED to the board?
Regards,
Sara

By: Ignatius D. Fernandes

Ignatius D. Fernandes — Sat, 05 Apr 2025 05:01:09 +0000

Hi!
Thankyou very much for the RGB project it is working very fine, I have a problem in adding 1 more slider to control other colour led independently. Can you please let me know how to add? I have tried adding but the colour of RGB is getting disturbed resulting to colouring randomly. Kindly help me to resolve this.Thanking you

By: Mihajlo

Mihajlo — Thu, 27 Jun 2024 00:12:43 +0000

I did everything as shown and I connected everything and in the serial monitor it appears to change the color, but the rgb diode does not light up, can the diode work, I tested it

By: sebulox

sebulox — Mon, 06 Feb 2023 07:41:05 +0000

Thank you for this very useful tuto, I wonder, would it be possible to use similar sliders to control how long and how often the LED would turn on and off, like with the “blink” script?

… and then maybe do the same with a relay, with many possible applications (timer, etc.).

By: Sara Santos

Sara Santos — Mon, 01 Jun 2020 14:24:39 +0000

In reply to dusko.

Hi.
You are right.
Those variables aren’t being used, so you can delete them.
Thanks for noticing.
I’ll update the code.
Regards,
Sara

By: dusko

dusko — Mon, 01 Jun 2020 00:28:39 +0000

Thank you very much for a great program. With small changes I was I able to control 3 servos using my tablet.

A small thing: I do not understand the need for the following 3 lines:

int redValue = 255; // Red RGB pin -> D11
int greenValue = 255; // Green RGB pin -> D10
int blueValue = 255; // Blue RGB pin -> D9

Just out of curiosity I commented them out and the sketch still works.

Thanks.

By: Teddy Chen

Teddy Chen — Mon, 02 Mar 2020 06:18:12 +0000

In reply to Sara Santos. I tried in on the DOIT ESP32 Dev Kit V1 (36 Pins) and it works well. Now I have a Geekreit ESP32 Dev Kit V1 (30 pins) and the blue tooth is not there, I could not detect it on my phone. Any thought?

By: Sara Santos

Sara Santos — Thu, 22 Aug 2019 14:16:58 +0000

In reply to heru. Yes. I think it should work, but I haven't tested it.

By: heru

heru — Wed, 14 Aug 2019 07:37:20 +0000

can i use this code on esp32 for controlling rgb led?

By: Sara Santos

Sara Santos — Wed, 11 Oct 2017 10:00:05 +0000

In reply to philip.

Hi Philip.
You should invert the color logic.
Take a look at the code in this blog post were we have the option for RGB anode and cathode
https://randomnerdtutorials.com/electronics-basics-how-do-rgb-leds-work/
Hope this helps.
Regards
Sara