Using 360° servo with M5Stack Servo-module

[steveinaustria]

How do I set the speed and direction of a 360° servo with M5Stack Servo-module? The Servo script shows how to set the angle of a normal (180°) servo, but using this script a 360° servo just spins in a clockwise direction at a constant speed whatever the settings are.

[missdrew]

over 90 degrees for one direction, less for the other, difference from 90 digrees is the speed.

[steveinaustria]

Thanks! I have written a function,

Servo_write_360()

which I can call with say 100 or 80

void Servo_write_360(uint8_t angle) {
    Wire.beginTransmission(SERVO_ADDR);
    Wire.write(angle);
    Wire.endTransmission();
}

However, whatever value I call the function with, the servo keeps going in the same direction at the same speed.

[missdrew]

Does the servo have a forward and reverse mode?

Post a link to both the controller & servo you have.

[steveinaustria]

As reported in the OP the controller is a M5Stack Servo-module https://eckstein-shop.de/M5Stack-SERVO-Module-Board-12-Channels?curr=EUR&gclid=CjwKCAiAuoqABhAsEiwAdSkVVCPisR_XiwHrekfAD84nS_EM4sdlf0wlzLdUq0TCkMR-ZeWw0fJK8BoCm1wQAvD_BwE

The servo is an "ezrobot 360" from an ezrobot kit. It must have forward and reverse modes because both are utilised when using the ezrobot controller.

[steveinaustria]

For completemess, here is the example sketch that works with the M5Stack Servo-module and a 180° servo:

/*
    Description: Use SERVO Module to control the rotation of 12-channel servo.
*/
#include <Arduino.h>
#include <M5Stack.h>
#include <Wire.h>


#define SERVO_ADDR 0x53
void setup() {
    M5.begin(true, false, true);
    M5.Power.begin();
    M5.Lcd.setTextFont(4);
    M5.Lcd.setCursor(70, 100);
    M5.Lcd.print("Servo Example");


    Wire.begin(21, 22, 100000);
    //Servo_write_360(92);
    // put your setup code here, to run once:
}


// addr 0x01 mean control the number 1 servo by us
void Servo_write_us(uint8_t number, uint16_t us) {
    Wire.beginTransmission(SERVO_ADDR);
    Wire.write(0x00 | number);
    Wire.write(us & 0x00ff);
    Wire.write(us >> 8 & 0x00ff);
    Wire.endTransmission();
}


// addr 0x11 mean control the number 1 servo by angle
void Servo_write_angle(uint8_t number, uint8_t angle) {
    Wire.beginTransmission(SERVO_ADDR);
    Wire.write(0x10 | number);
    Wire.write(angle);
    Wire.endTransmission();
}


void loop() {
    
    for(uint8_t i = 0; i < 12; i++){
        //Servo_write_us(i, 700);
        Servo_write_angle(i, 0);
    }
    delay(1000);
    for(uint8_t i = 0; i < 12; i++){
        //Servo_write_us(i, 2300);
        Servo_write_angle(i, 90);
    }
         delay(1000);
}