Esp 32s servo not working correctly

Hardware
1

Hi im trying to use the servo with my esp32s but it does not work and the error code im getting is the following:

In file included from C:\Users\hacke\AppData\Local\Temp\.arduinoIDE-unsaved2023824-24352-n4hf7f.uateh\01-SimpleServo\01-SimpleServo.ino:1:
c:\Users\hacke\Documents\Arduino\libraries\ServoESP32\src/Servo.h:68:81: error: call to non-'constexpr' function 'const _Tp& std::min(const _Tp&, const _Tp&) [with _Tp = int]'
     static const int TIMER_RESOLUTION = std::min(16, SOC_LEDC_TIMER_BIT_WIDE_NUM);
                                                                                 ^
c:\Users\hacke\Documents\Arduino\libraries\ServoESP32\src/Servo.h: In member function 'T ServoTemplate<T>::mapTemplate(T, T, T, T, T) const':
c:\Users\hacke\Documents\Arduino\libraries\ServoESP32\src/Servo.h:256:28: error: 'is_floating_point_v' is not a member of 'std'
         if constexpr (std::is_floating_point_v<T>) {
                            ^~~~~~~~~~~~~~~~~~~
c:\Users\hacke\Documents\Arduino\libraries\ServoESP32\src/Servo.h:256:28: note: suggested alternative: 'is_floating_point'
         if constexpr (std::is_floating_point_v<T>) {
                            ^~~~~~~~~~~~~~~~~~~
                            is_floating_point
c:\Users\hacke\Documents\Arduino\libraries\ServoESP32\src/Servo.h:256:49: error: expected primary-expression before '>' token
         if constexpr (std::is_floating_point_v<T>) {
                                                 ^
c:\Users\hacke\Documents\Arduino\libraries\ServoESP32\src/Servo.h:256:50: error: expected primary-expression before ')' token
         if constexpr (std::is_floating_point_v<T>) {
                                                  ^

exit status 1

Compilation error: exit status 1

I do not know the reason for this and any help or suggestion would be major. Thank you and hope you guys are having a good day.

2

Of course not as You have not gotten the code downloaded.

You need to use a correct syntax. More....

Please read and use this topic: How to get the best out of this forum - Using Arduino / IDE 1.x - Arduino Forum

3

i do have the library downloaded and the code i used was part as the example.

#include <Servo.h>

static const int servoPin = 13;

Servo servo1;

void setup() {
    Serial.begin(115200);
    servo1.attach(servoPin);
}

void loop() {
    for(int posDegrees = 0; posDegrees <= 180; posDegrees++) {
        servo1.write(posDegrees);
        Serial.println(posDegrees);
        delay(20);
    }

    for(int posDegrees = 180; posDegrees >= 0; posDegrees--) {
        servo1.write(posDegrees);
        Serial.println(posDegrees);
        delay(20);
    }
}
4

Why don't You follow and respond to the last line advice in reply #2?
You need to read the full reply, not only one line.

5

Servo.h Library is not supported by ESP32.

Include the attached Libray with the IDE and then upload the following example taken from IDE's Examples. Report the result. I attached a very old SG90 Servo, but it turns intermittently. Use seperate 5V power supply as the Servo takes about 100 - 250 mA during movement with load; whereas, ESP32's pin can supply max 40 mA (recommended use is 20 mA).

#include <ESP32Servo.h>

Servo myservo;  // create servo object to control a servo
int pos = 0;

int servoPin = 13;

void setup()
{
  // Allow allocation of all timers
  ESP32PWM::allocateTimer(0);
  ESP32PWM::allocateTimer(1);
  ESP32PWM::allocateTimer(2);
  ESP32PWM::allocateTimer(3);
  myservo.setPeriodHertz(50);    // standard 50 hz servo
  myservo.attach(servoPin, 1000, 2000); // attaches the servo on pin 18 to the servo object
}

void loop() 
{
  for (pos = 0; pos <= 180; pos += 1) { // goes from 0 degrees to 180 degrees
    // in steps of 1 degree
    myservo.write(pos);    // tell servo to go to position in variable 'pos'
    delay(15);             // waits 15ms for the servo to reach the position
  }
  for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees
    myservo.write(pos);    // tell servo to go to position in variable 'pos'
    delay(15);             // waits 15ms for the servo to reach the position
  }
}

ESP32Servo-0.13.0.zip (52.6 KB)

1 Like
6

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.