This library allows to drive a HX711 load cess amplifier with a Raspberry Pi by using gpiozero library.
- to set channel and gain
- to read raw value
This package requires gpiozero to be installed in Python 3.
from hx711_gpiozero import HX711
from time import sleep
spi = HX711()
print("Initiating ...")
init_reading = spi.value
sleep(1)
input("Put a known mass on the scale, then press `enter`.")
try:
rel_weight = float(input("What is the weight of the known mass?\n"))
except ValueError as err:
print(err)
print("(The input of weight can only be numbers)")
exit(1)
rel_reading = spi.value
scale_ratio = rel_weight / (rel_reading - init_reading)
sleep(1)
while True:
weight = (spi.value - init_reading) * scale_ratio
print(weight)
sleep(1)