How to have an Arduino wait until it receives data over serial?
- by SonicDH
So I've wired up a little robot with a sound shield and some sensors. I'm trying to write a sketch that will let check the sensors.
What I'd like for it to do is print out a little menu over serial, wait until the user sends a selection, jump to the function that matches their selection, then (once the function is done) jump back and print the menu again. Here's what I've written, but I'm not a that good of a coder, so it doesn't work. Where am I going wrong?
#include <Servo.h>
Servo steering;
Servo throttle;
int pos = 0;
int val = 0;
void setup(){
Serial.begin(9600);
throttle.write(90);
steering.write(90);
pinMode(A0, INPUT);
pinMode(7, INPUT);
char ch = 0;
}
void loop(){
Serial.println("Menu");
Serial.println("--------------------");
Serial.println("1. Motion Readout");
Serial.println("2. Distance Readout");
Serial.println("3. SD Directory Listing");
Serial.println("4. Sound Test");
Serial.println("5. Car Test");
Serial.println("--------------------");
Serial.println("Type the number and press enter");
while(char ch = 0){
ch = Serial.read();}
char ch;
switch(ch)
{
case '1':
motion();
}
ch = 0;
}
//menu over, lets get to work.
void motion(){
Serial.println("Haha, it works!");
}
I'm pretty sure a While loop is the right thing to do, but I'm probably implementing it wrong. Can anyone shed some light on this?
