Mail to Code

Send an Arduino project file to Rover R20 and see what happens.

Mail to Code with Rover R20

Abbildung 2:
Rover R20 has an Arduino MEGA microcontroller.

Pinout R20

Pin 22: LED
Pin 24: LED
Pin 26: LED
Pin 28: LED
Pin 30: LED
Pin 32: LED

Pin 34: Bumper front right
Pin 36: Bumper front left
Pin 38: Bumper rear right
Pin 40: Bumper rear left

Pin 44: Drive servo right
Pin 46: Drive servo left

Note!

To switch the right servo to drive forward, the rotation angle must be set to 60, and to 120 to drive backwards.
The values for the left servo must be swapped. A rotation angle of 120 degrees applies to forwards, a rotation angle of 60 applies to backwards.
Similarly, the rover will rotate to the left if both rotation angles are set to 60 degrees and the rover will rotate to the right if both servos are set to a rotation angle of 120.
It's best to turn on all LEDs, because it could be dark on my attic when you send your code!

Example code

Use the following example code as a basis for your experiments:

#include <Servo.h>

#define LED_1       22
#define LED_2       24
#define LED_3       26
#define LED_4       28
#define LED_5       30
#define LED_6       32

#define BUMPER_FR   34
#define BUMPER_FL   36
#define BUMPER_RL   38
#define BUMPER_RR   40

#define SERVO_R     44
#define SERVO_L     46

Servo servo_L;
Servo servo_R;

void drive_backward(){
    servo_L.attach(SERVO_L);
    servo_L.write(60);
    servo_R.attach(SERVO_R);
    servo_R.write(120);
}

void drive_forward(){
    servo_L.attach(SERVO_L);
    servo_L.write(120);
    servo_R.attach(SERVO_R);
    servo_R.write(60);
}

void turn_left(){
    servo_L.attach(SERVO_L);
    servo_L.write(60);
    servo_R.attach(SERVO_R);
    servo_R.write(60);
}

void turn_right(){
    servo_L.attach(SERVO_L);
    servo_L.write(120);
    servo_R.attach(SERVO_R);
    servo_R.write(120);
}

void drive_stop(){
    servo_L.detach();
    servo_R.detach();
}

void setup() {
    pinMode(BUMPER_RR, INPUT_PULLUP);
    pinMode(BUMPER_RL, INPUT_PULLUP);
    pinMode(BUMPER_FL, INPUT_PULLUP);
    pinMode(BUMPER_FR, INPUT_PULLUP);
    pinMode(LED_1, OUTPUT);
    pinMode(LED_2, OUTPUT);
    pinMode(LED_3, OUTPUT);
    pinMode(LED_4, OUTPUT);
    pinMode(LED_5, OUTPUT);
    pinMode(LED_6, OUTPUT);
    digitalWrite(LED_1, HIGH);
    digitalWrite(LED_2, HIGH);
    digitalWrite(LED_3, HIGH);
    digitalWrite(LED_4, HIGH);
    digitalWrite(LED_5, HIGH);
    digitalWrite(LED_6, HIGH);
}

void loop() {
    drive_backward();
    delay(2400);
    drive_stop();
    delay(2100);
    
    turn_left();
    delay(2400);
    drive_stop();
    delay(2100);
    
    drive_forward();
    delay(2400);
    drive_stop();
    delay(2100);
    
    turn_left();
    delay(2400);
    drive_stop();
    delay(2100);
}

With the code, the rover drives back, then turns left, moves forward, turns left, and so on in an endless loop. Modify the code and see how the rover moves with your code. The 6 LEDs are switched on in the setup routine so that you can see a little even in the dark.

You know what do do? let's move the robot!

Send an email to R20 by klicking on this link. (your mail program should open). Don't forget to attach your Arduino project file (*.ino) or copy the code into the email text!
Your email with the lines of code will be answered automatically and if your code compiled without errors, you will receive a video file showing what the rover recorded during its journey. Your code and this video file will also be published on this page so that others can learn from your ideas. The submitted code automatically becomes open source! So don't send anything that you want to keep secret.
Have patience! Processing the email and sending a reply takes a few minutes!

So don't send the same email multiple times just because you didn't receive the answer immediately or the result doesn't appear on this page! However, if nothing has happened after 15 minutes, send me a bug report that also includes your code.

You like the idea and want to spend me an Obol?

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Thank you!