while (Serial.available()

[holt24]

Hi. I'm receiving serial data from an Arduino over USB the data comes at anytime, could be 30 minutes between messages. I have the following while loop that does the job but it prints an empty line ever loop.  On the Arduino I can do "while (Serial.available()" How could this be done in Python?

Thanks.

while 1:
        try:
            msg = ser.readline()
            msg=msg.decode('utf-8')
            print(msg)
            time.sleep(1)
        except ser.SerialTimeoutException:
            print("Data could not be read")
        time.sleep(1)

[DougArndt]

I'm doing something similar with a PicAXE over bluetooth, and found the ser.inWaiting() of use

while 1:
      while ser.inWaiting() > 20:

[holt24]

I'm doing something similar with a PicAXE over bluetooth, and found the ser.inWaiting() of use

while 1:
      while ser.inWaiting() > 20:

Hi thanks for that I did this.

while 1:
        try:
            msg = ser.readline()
            msg=msg.decode('utf-8')
            if len(msg) > 0:
                print(msg)

 
Now that only goes to print if msg is > than 0.
That stopped the code printing empty lines.
I will use your code next time.
holt24.