def easy_weight(weight_sensor):
pin_dt = 5
pin_sck = 6
channel = 'A'
reference_unit = 1
offset = 0
try:
pin_dt = int(weight_sensor["pin_dt"])
pin_sck = int(weight_sensor["pin_sck"])
channel = weight_sensor["channel"]
reference_unit = float(weight_sensor["reference_unit"])
offset = int(weight_sensor["offset"])
except Exception as e:
print("HX711 missing param: " + str(e))
try:
GPIO.setmode(GPIO.BCM) # set GPIO pin mode to BCM numbering
# Create an object hx which represents your real hx711 chip
hx = HX711(dout_pin=pin_dt, pd_sck_pin=pin_sck, select_channel=channel)
hx.set_scale_ratio(scale_ratio=reference_unit)
hx.set_offset(offset=offset)
# use outliers_filter and do average over 30 measurements
weight = hx.get_weight_mean(30)
if weight != False:
return round(weight, 1)
except Exception as e:
print("Fallback HX711 failed: " + str(e))
finally:
pass
return None
def init_hx711(weight_sensor):
# HX711 GPIO
pin_dt = 5
pin_sck = 6
channel = 'A'
errorEncountered = False
try:
try:
debug = weight_sensor["debug"]
except:
debug = False
try:
pin_dt = int(weight_sensor["pin_dt"])
pin_sck = int(weight_sensor["pin_sck"])
channel = weight_sensor["channel"]
except Exception as e:
logger.error("init_hx711 missing param: " + str(e))
logger.debug('Init HX711 DT: ' + str(pin_dt) + ' SCK: ' +
str(pin_sck) + ' Channel: ' + channel + ' started')
loops = 0
while not errorEncountered and loops < 3:
loops += 1
try:
GPIO.setmode(GPIO.BCM) # set GPIO pin mode to BCM numbering
# Create an object hx which represents your real hx711 chip
hx = HX711(dout_pin=pin_dt,
pd_sck_pin=pin_sck,
select_channel=channel)
hx.set_debug_mode(flag=debug)
errorEncountered = hx.reset(
) # Before we start, reset the hx711 (not necessary)
if not errorEncountered:
logger.debug('Init HX711 DT: ' + str(pin_dt) + ' SCK: ' +
str(pin_sck) + ' Channel: ' + channel +
' finished')
return hx
except Exception as e:
if str(e) == "no median for empty data":
logger.debug(
'HX711 DT: ' + str(pin_dt) + ' SCK: ' + str(pin_sck) +
' Channel: ' + channel +
' Could not read enough data from HX711 => Try again: '
+ str(loops) + '/3')
else:
logger.warning('HX711 DT: ' + str(pin_dt) + ' SCK: ' +
str(pin_sck) + ' Channel: ' + channel +
' Initializing HX711 failed: ' + str(e))
time.sleep(1)
logger.error('Returning empty HX711 for DT: ' + str(pin_dt) +
' SCK: ' + str(pin_sck) + ' Channel: ' + channel)
return None
except Exception as e:
logger.exception("Unhandled Exception in init_hx711")
def init_hx711(weight_sensor, debug=False):
# HX711 GPIO
pin_dt = 5
pin_sck = 6
channel = 'A'
errorEncountered = False
try:
pin_dt = int(weight_sensor["pin_dt"])
pin_sck = int(weight_sensor["pin_sck"])
channel = weight_sensor["channel"]
except Exception as e:
print("HX711 missing param: " + str(e))
loops = 0
while not errorEncountered and loops < 3:
loops += 1
try:
GPIO.setmode(GPIO.BCM) # set GPIO pin mode to BCM numbering
# Create an object hx which represents your real hx711 chip
hx = HX711(dout_pin=pin_dt,
pd_sck_pin=pin_sck,
select_channel=channel)
if debug:
hx.set_debug_mode(flag=debug)
errorEncountered = hx.reset(
) # Before we start, reset the hx711 (not necessary)
if not errorEncountered:
return hx
except Exception as e:
if str(e) == "no median for empty data":
print("Could not read any data from HX711 => Try again: " +
str(loops) + "/3")
else:
print("Initializing HX711 failed: " + str(e))
time.sleep(1)
print("Returning empty HX711")
return None