I got this running and it is working fine. It sends the weight (in pounds) to my Android phone every 30 minutes using Tasker and AutoRemote. Tasker converts the pounds to a percent full value and sends the date, time, percent, and weight data to a spreadsheet. I'm going to let it run for a few days to watch for drift. If it seems stable I will deploy it in the water cooler and change it to send once per day.
I would also like to have it run once through and stop instead of in a "while True" loop. I will have to do something about the tare function of the first part. Wonder if there is some way to establish a standard reference value so I can run on a cronjob...
Please disregard all the mess. I was just cleaning up the math because it was reporting -2014.648973296334 for a 20 pound weight and -3994.4979318759 for a 40 pound weight. The "roundedval" is what equals the weight on the scale, in pounds. I tested it with a variety of dumbells. The water cooler tank is 5 gallons, which should be about 41.5 pounds.
I would also like to have it run once through and stop instead of in a "while True" loop. I will have to do something about the tare function of the first part. Wonder if there is some way to establish a standard reference value so I can run on a cronjob...
Code:
import timeimport sysimport RPi.GPIO as GPIOfrom hx711 import HX711import requestsfrom ShaneKeys import ARKEY1def cleanAndExit(): print("Cleaning...") print("Bye!") sys.exit()hx = HX711(20, 21)hx.set_reading_format("MSB", "MSB")referenceUnit = 114hx.set_reference_unit(referenceUnit)hx.reset()hx.tare()print("Tare done! Add weight now...")while True: try: val = hx.get_weight(5) wholeval = (val * -1) newval = wholeval / 100 roundedval = round(newval, 2) print(roundedval) weight = str(roundedval) r = requests.post(ARKEY1 + "|water|" + str(roundedval)) hx.power_down() hx.power_up() time.sleep(1800) except (KeyboardInterrupt, SystemExit): cleanAndExit()Code:
wholeval = (val * -1) newval = wholeval / 100 roundedval = round(newval, 2) print(roundedval) weight = str(roundedval)Statistics: Posted by duckredbeard — Wed Jan 22, 2025 3:43 am