Hello mates
I`m trying to build quadcopter wireless remote control using the funduino joystick
The quadcopter:
4 Motors 1000kv
4 esc 30a
1 multiwii v2.1 pro flight controller
As an TX
funduino joystick shield
aurdino uno
nrf24
As RX i used
aurduino uno
nrf24
I got a code problem as i still don`t know how to receive it on the other side of the rx, and how the multiwii will understand the signal from the uno
can anyone help me with it ?
Thanks
Mena
Joystick_Shield.ino (1.48 KB)
I got a code problem as i still don`t know how to receive it on the other side of the rx
How to receive what?
Serial.print("UP = "),Serial.print(digitalRead(up_button)),Serial.print("\t");
Serial.print("DOWN = "),Serial.print(digitalRead(down_button)),Serial.print("\t");
Serial.print("LEFT = "),Serial.print(digitalRead(left_button)),Serial.print("\t");
Serial.print("RIGHT = "),Serial.print(digitalRead(right_button)),Serial.print("\t");
Serial.print("START = "),Serial.print(digitalRead(start_button)),Serial.print("\t");
Serial.print("SELECT = "),Serial.print(digitalRead(select_button)),Serial.print("\t");
Serial.print("ANALOG = "),Serial.print(digitalRead(analog_button)),Serial.print("\t");
Serial.print("X = "),Serial.print(map(analogRead(x_axis), 0, 1000, -1, 1));Serial.print("\t");
Serial.print("Y = "),Serial.print(map(analogRead(y_axis), 0, 1000, -1, 1));Serial.print("\n");
Sending data that has changed makes sense. Sending all this every times does not.
The range of values that can be read from a joystick should be 0 to 1023. Your deadband is huge.
UP, DOWN, LEFT, RIGHT, START, and ANALOG can be abbreviated to one letter. SELECT can become PICK, and then abbreviated to one letter. Doing this makes parsing easier on the other end.
I got a code problem as i still don`t know how to receive it on the other side of the rx, and how the multiwii will understand the signal from the uno
The multiwii will never understand the code from the Arduino. It is an OUTPUT device. It is NOT an input device. Sending data TO the wii makes no sense. You get data FROM the wii.
I`m not following, can you explain what I should do PaulS ?
Many thanks mate
To talk to the MultiWii you treat it like any RC receiver treats anything: like a set of servos. Use the Servo library to set up four or more output pins to use for Throttle, Aileron, Rudder, and Elevator etc. In the Arduino use servo.write() or servo.writeMicroseconds() to send the values you receive from the radio to the MultiWii. The .write() uses values from 0 to 180 and .writeMicroseconds() uses values from 1000 to 2000.
Some servo tx/rx test code using pots for servo positioning.
tx code
//zoomkat multi pot/servo test 3-23-13
//includes dead band for testing and limit servo hunting
//view output using the serial monitor
#include <Servo.h>
Servo myservo1; //declare servos
Servo myservo2;
Servo myservo3;
Servo myservo4;
Servo myservo5;
int potpin1 = 0; //analog input pin A0
int potpin2 = 1;
int potpin3 = 2;
int potpin4 = 3;
int potpin5 = 4;
int newval1, oldval1; //pot input values
int newval2, oldval2;
int newval3, oldval3;
int newval4, oldval4;
int newval5, oldval5;
void setup()
{
Serial.begin(9600);
myservo1.attach(2);
myservo2.attach(3);
myservo3.attach(4);
myservo4.attach(5);
myservo5.attach(6);
Serial.println("testing multi pot servo");
}
void loop()
{
newval1 = analogRead(potpin1);
newval1 = map(newval1, 0, 1023, 0, 179);
if (newval1 < (oldval1-2) || newval1 > (oldval1+2)){ //dead band
myservo1.write(newval1); //position the servo
Serial.print(newval1); //print the new value for testing
Serial.print("a,");
oldval1=newval1; //set the current old value
}
newval2 = analogRead(potpin2);
newval2 = map(newval2, 0, 1023, 0, 179);
if (newval2 < (oldval2-2) || newval2 > (oldval2+2)){
myservo2.write(newval2);
Serial.print(newval2);
Serial.print("b,");
oldval2=newval2;
}
newval3 = analogRead(potpin3);
newval3 = map(newval3, 0, 1023, 0, 179);
if (newval1 < (oldval1-2) || newval3 > (oldval3+2)){
myservo1.write(newval3);
Serial.print(newval3);
Serial.print("c,");
oldval3=newval3;
}
newval4 = analogRead(potpin4);
newval4 = map(newval4, 0, 1023, 0, 179);
if (newval1 < (oldval1-2) || newval4 > (oldval4+2)){
myservo1.write(newval4);
Serial.print(newval4);
Serial.print("d,");
oldval4=newval4;
}
newval5 = analogRead(potpin5);
newval5 = map(newval5, 0, 1023, 0, 179);
if (newval1 < (oldval5-2) || newval5 > (oldval5+2)){
myservo1.write(newval5);
Serial.print(newval5);
Serial.print("e,");
oldval5=newval5;
}
delay(50); //to slow loop for testing, adjust as needed
}
rx code
//zoomkat 11-22-12 simple delimited ',' string parse
//from serial port input (via serial monitor)
//and print result out serial port
//multi servos added
String readString;
#include <Servo.h>
Servo myservoa, myservob, myservoc, myservod, myservoe; // create servo object to control a servo
void setup() {
Serial.begin(9600);
//myservoa.writeMicroseconds(1500); //set initial servo position if desired
myservoa.attach(6); //the pin for the servoa control
myservob.attach(7); //the pin for the servob control
myservoc.attach(8); //the pin for the servoc control
myservod.attach(9); //the pin for the servod control
myservod.attach(10); //the pin for the servoe control
Serial.println("multi-servo-delimit-test-dual-input-11-22-12"); // so I can keep track of what is loaded
}
void loop() {
//expect single strings like 700a, or 1500c, or 2000d,
//or like 30c, or 90a, or 180d,
//or combined like 30c,180b,70a,120d,
if (Serial.available()) {
char c = Serial.read(); //gets one byte from serial buffer
if (c == ',') {
if (readString.length() >1) {
Serial.println(readString); //prints string to serial port out
int n = readString.toInt(); //convert readString into a number
// auto select appropriate value, copied from someone elses code.
if(n >= 500)
{
Serial.print("writing Microseconds: ");
Serial.println(n);
if(readString.indexOf('a') >0) myservoa.writeMicroseconds(n);
if(readString.indexOf('b') >0) myservob.writeMicroseconds(n);
if(readString.indexOf('c') >0) myservoc.writeMicroseconds(n);
if(readString.indexOf('d') >0) myservod.writeMicroseconds(n);
if(readString.indexOf('e') >0) myservoe.writeMicroseconds(n);
}
else
{
Serial.print("writing Angle: ");
Serial.println(n);
if(readString.indexOf('a') >0) myservoa.write(n);
if(readString.indexOf('b') >0) myservob.write(n);
if(readString.indexOf('c') >0) myservoc.write(n);
if(readString.indexOf('d') >0) myservod.write(n);
if(readString.indexOf('e') >0) myservoe.write(n);
}
readString=""; //clears variable for new input
}
}
else {
readString += c; //makes the string readString
}
}
}