Ana María Hernández Moreno asked 3 years ago
Good morning.
I have a question.
I followed the step by step of the book and managed to successfully create the proposed application in ESP32 with firebase. My question is how do I replace the PWM LEDs to be controlled by a servo motor, I don’t have much experience with ESP and I still can’t identify where in the code I should make the change and add the servo.write() function. If you have an example with a servomotor that I can observe and that is not connected through a webserver but through firebase with the sliders of the application.
Thank you very much.
Sara Santos Staff answered 3 years ago
Hi.
We don’t have any examples for Firebase and servo motors.
First, remove all sections that refer to the PWM LEDs.
Then, include the servo library and create a servo object on your desired pin as shown in the first example in this tutorial: https://randomnerdtutorials.com/esp32-servo-motor-web-server-arduino-ide/
Then, instead of having something as shown below for LEDs:
int pwmValue = result.to<int>();
ledcWrite(slider1Channel, map(pwmValue, 0, 100, 0, 255));
You’ll add the corresponding command to control a servo.
int post = result.to<int>();
myservo.write(pos); // tell servo to go to position in variable 'pos'
Try it out, and then tell me if you need further help.
Regards,
Sara
Ana María Hernández Moreno answered 3 years ago
Good afternoon.
I tell you, when I put to work independently the servomotor works well, but when I activate the lines of the ledcSetup library the servomotor stops responding, if I decomment those lines the servo works fine. Since I need that the slider two works with a led and the slider 1 is the one that is going to work with the servomotor.
Sara Santos Staff answered 2 years ago
Hi.
What channel are you using for the LED PWM?
The servo motor will use channel 0 by default. Try to use channel 3 for PWM LED.
Let me know if that solves the issue.
Regards,
Sara