arduino pyfirmata analog reading

Asked Mar 11 '21 at 00:57

Active Mar 11 '21 at 00:57

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Im having trouble reading the analog value of my Arduino using pyfirmata. Every time I ask to read the value of ('a:0:i) it will always return a random set of numbers, regardless of whether I have an analog pin plugged in or not.

import pyfirmata

board = pyfirmata.Arduino('COM4')

it = pyfirmata.util.Iterator(board)
it.start()

analog_read = board.get_pin('a:0:i')

while True:
    print(analog_read.read())
    time.sleep(2)

The output will return

0.3255
0.3255
0.3294
#and up

asked Mar 11 '21 at 00:57

Caleb Welsh

Does it read correctly with a load? If you don't have a load, the pin floats, and the readings can be random. – Tim Roberts Mar 11 '21 at 01:00
This can be with or without a load – Caleb Welsh Mar 12 '21 at 03:10
How random? What you're showing there is +/- 1%, which is pretty darned good. – Tim Roberts Mar 12 '21 at 05:23

arduino pyfirmata analog reading

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