serial-scale-hx711 2.1.1

Python driver for Arduino+HX711 serial weighing scales.

serial-scale-hx711

Python driver for Arduino+HX711 serial weighing scales.

Renamed from serial-weighing-scale (PyPI: serial-weighing-scale ≤ 2.0.4). New releases publish under serial-scale-hx711. A deprecation stub remains on PyPI under the old name pointing here.

Hardware

• Arduino Uno (USB-A to USB-B cable)
• HX711 load cell amplifier (e.g. SparkFun SEN-13879)
• Load cell 100 g or 500 g (e.g. SEN-14727 / SEN-14728)
• Firmware: see scale_firmware/ (uses olkal/HX711_ADC)

The scale identifies itself as <SerialWeighingScale> over 115200 baud.

Install

pip install serial-scale-hx711

Or editable from this repo:

pip install -e .

Usage

from serial_scale_hx711 import Scale

scale = Scale(serial_port="/dev/ttyACM1")
scale.start()          # connect and wait for firmware init
scale.tare()
weight = scale.read_weight_blocking()   # grams, blocks until stable
scale.disconnect()

Auto-detect port

from serial_scale_hx711 import connect_serial_scale

scale = connect_serial_scale(["/dev/ttyACM0", "/dev/ttyACM1", "/dev/ttyACM2"])

API

Method	Description
start(timeout=10)	Connect and wait for firmware ready
tare()	Zero the scale
read_weight()	Single reading (float or None)
read_weight_blocking(n_valid, timeout)	Block until N valid readings, return median
read_weight_reliable(n_readings, measure)	Repeated reads with custom aggregation
identify()	True if firmware responds with identity string
get_calibration_factor()	Read calibration factor from firmware
disconnect()	Close serial connection

murineshiftwork integration

Used via murineshiftwork.logic.scale.SerialWeighingScaleAdapter. Install with:

pip install "murineshiftwork[calibration]"