/
hxtest.py
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/
hxtest.py
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from hx711_spi import *
from utime import ticks_ms, ticks_diff, sleep, sleep_ms
from machine import Pin
from onewire import DS18X20
from onewire import OneWire
#DS18B20 data line connected to pin P21
ow = OneWire(Pin('P21'))
temp = DS18X20(ow)
hx = HX711("P10", "P11", "P9")
#hx = HX711( "P10", "P11")
hx.OFFSET = -150000
data = [0 for _ in range(100)]
def get_median(hx, num=100):
for _ in range(num):
data[_] = hx.read()
data.sort()
return data[num // 2]
def run(loops = 100):
temp.start_conversion()
start = ticks_ms()
hx.set_gain(128)
sleep_ms(50)
resulta = get_median(hx, loops)
hx.set_gain(32)
sleep_ms(50)
resultb = get_median(hx, loops)
t = temp.read_temp_async()
print(resulta, resultb, t)
def run100(loops=100, delay = 1):
for _ in range (loops):
run(100)
if delay:
sleep(delay)
def minmax(loops=10000):
middle = hx.read_average(1000)
hx.filtered = middle
middle -= hx.OFFSET
cnt0003 = 0
cnt001 = 0
cnt003 = 0
cnt010 = 0
cnt030 = 0
cnt100 = 0
cntx = 0
print ("Average", middle)
for _ in range(loops):
val = hx.read_lowpass() - hx.OFFSET
if middle * (1 - 0.00003) < val < middle * (1 + 0.00003):
cnt0003 += 1
elif middle * (1 - 0.0001) < val < middle * (1 + 0.0001):
cnt001 += 1
elif middle * (1 - 0.0003) < val < middle * (1 + 0.0003):
cnt003 += 1
elif middle * (1 - 0.001) < val < middle * (1 + 0.001):
cnt010 += 1
elif middle * (1 - 0.003) < val < middle * (1 + 0.003):
cnt030 += 1
elif middle * (1 - 0.01) < val < middle * (1 + 0.01):
cnt100 += 1
else:
cntx += 1
print("Really out of band at %d: %d %x" % (_, int(val), int(val)))
print("+/- 0.003%% %f\n+/- 0.01%% %f\n+/- 0.03%% %f\n+/- .1%% %f\n+/- .3%% %f\n+/- 1%% %f\nBeyond: %f" %
(cnt0003/loops, cnt001/loops, cnt003/loops, cnt010/loops, cnt030/loops, cnt100/loops, cntx/loops))
run()
#minmax(1000)