Pyserial and Arduino

Projects Programming
1

I have designed some code that should turn an led on and off when "high" or "low" are typed into the python interface. As I am using pyserial I make it write a character across serial that should then turn the led on and off. For some reason unknown to me it isn't though. Here is the code for the arduino side:

int led = 13;

void setup() {
  Serial.begin(9600); // set the baud rate
  Serial.println("Ready"); // print "Ready" once
  pinMode(led, OUTPUT);
}
void loop() {
  char inByte = ' ';
  if (Serial.available()) { // only send data back if data has been sent
    char inByte = Serial.read(); // read the incoming data
    Serial.println(inByte); // send the data back in a new line so that it is not all one long line
  }
  delay(100); // delay for 1/10 of a second
  if (inByte == '1');
  {
    digitalWrite(led, HIGH);
    delay(1000);
  }

  if (inByte == '0')
  {
    digitalWrite(led, LOW);
    delay(1000);
  }
}

and here is the code for the python side

import serial
tries = 0

Arduino = serial.Serial(port="COM5", baudrate="9600")


while tries < 100:
    ans = raw_input("High or Low??")

    if ans == "low":
        Arduino.write('1')

    if ans == "high":
        Arduino.write('0')

I know that you could do this just with the arduino language before anyone makes a comment about that because I wanted to test how well that they interface together.

P.S:
When I run the program the LED is constantly on and the TX pin is flashing but the RX pin isn't doing anything...

2

tries is never increased ?

char inByte = Serial.read();

should be

inByte = Serial.read();

you declared a new variable with a smaller scope

3

You don't specify the following serial parameters when you open the port in python:

parity, stopbits, bytesize, rtscts, dsrdtr, xonxoff, timeout

Perhaps you should check they are correct?

4

That worked! thank you very much!

my excuse is it was a beginners mistake...