Mod to make this work for ESP32s (solved)

[jackthese]

No description provided.

[jackthese]

I did get this working for ESP32s by using the Arduino IDE Library Manager to install the unique ESP32 servo library (ESP32Servo), and then modifying line 16 of ESC.h to point to that instead of Servo.h, fyi. Here's the modified Knob Example:

/*
ESC_Knob
Controlling an R/C ESC (Electronic Speed Controller) speed using a potentiometer (variable resistor)
This is using a modified version of the "Knob" example in the "Servo" library.

27 April 2017
by Eric Nantel

Servo & Knob links
http://www.arduino.cc/en/Tutorial/Knob
http://people.interaction-ivrea.it/m.rinott
*/

/* Note: the following code is a modification of the Knob Example that

• comes with the ESC library, so that it works with an ESP32 DevKit V1
• and my particular ESC (generic 30A) and brushless motor (generic 2200KV)
  */

#include <ESP32Servo.h> // ESP32Servo library installed by Library Manager
#include "ESC.h" // RC_ESP library installed by Library Manager

#define ESC_PIN (33) // connected to ESC control wire
#define LED_BUILTIN (2) // not defaulted properly for ESP32s/you must define it
#define POT_PIN (34) // Analog pin used to connect the potentiometer center pin

// Note: the following speeds may need to be modified for your particular hardware.
#define MIN_SPEED 1040 // speed just slow enough to turn motor off
#define MAX_SPEED 1240 // speed where my motor drew 3.6 amps at 12v.

ESC myESC (ESC_PIN, 1000, 2000, 500); // ESC_Name (PIN, Minimum Value, Maximum Value, Arm Value)

long int val; // variable to read the value from the analog pin

void setup() {
Serial.begin(9600);
delay(1000);
pinMode(POT_PIN, INPUT);
pinMode(ESC_PIN, OUTPUT);
pinMode(LED_BUILTIN, OUTPUT);
digitalWrite(LED_BUILTIN, HIGH); // set led to on to indicate arming
myESC.arm(); // Send the Arm command to ESC
delay(5000); // Wait a while
digitalWrite(LED_BUILTIN, LOW); // led off to indicate arming completed

// the following loop turns on the motor slowly, so get ready
for (int i=0; i<350; i++){ // run speed from 840 to 1190
myESC.speed(MIN_SPEED-200+i); // motor starts up about half way through loop
delay(10);
}
} // speed will now jump to pot setting

void loop() {
val = analogRead(POT_PIN); // read the pot (value between 0 and 4095 for ESP32 12 bit A to D)
Serial.println(val);
val = map(val, 0, 4095, MIN_SPEED, MAX_SPEED); // scale pot reading to valid speed range
myESC.speed(val); // sets the ESC speed
delay(10); // Wait for a while
}

[chipko]

Thank you! I've been occasionally looking at doing this and you have now helped me achieve such a thing! The possibilities now are immense! :D