https://github.com/endail/hx711-pico-mpy

MicroPython implementation of HX711 use via RP2040's state machine
https://github.com/endail/hx711-pico-mpy

hx711 iot load-cell loadcell micropython micropython-rpi-pico pio pioasm python raspberry-pi-pico raspberry-pi-pico-rp2040 rp2040 state-machine

Last synced: 3 months ago
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MicroPython implementation of HX711 use via RP2040's state machine

• Host: GitHub
• URL: https://github.com/endail/hx711-pico-mpy
• Owner: endail
• License: mit
• Created: 2022-08-26T11:49:09.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2023-03-14T08:23:56.000Z (almost 2 years ago)
• Last Synced: 2024-10-31T09:50:16.650Z (3 months ago)
• Topics: hx711, iot, load-cell, loadcell, micropython, micropython-rpi-pico, pio, pioasm, python, raspberry-pi-pico, raspberry-pi-pico-rp2040, rp2040, state-machine
• Language: Python
• Homepage:
• Size: 39.1 KB
• Stars: 12
• Watchers: 1
• Forks: 1
• Open Issues: 2
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# hx711-pico-mpy

MicroPython port of [hx711-pico-c](https://github.com/endail/hx711-pico-c).

Implemented as a [single Python file](https://raw.githubusercontent.com/endail/hx711-pico-mpy/main/src/hx711.py) which you can drop into your project.

## Example

```python

from machine import Pin

from src.hx711 import *

# 1. initalise the hx711 with pin 14 as clock pin, pin

# 15 as data pin

hx = hx711(Pin(14), Pin(15))

# 2. power up

hx.set_power(hx711.power.pwr_up)

# 3. [OPTIONAL] set gain and save it to the hx711

# chip by powering down then back up

hx.set_gain(hx711.gain.gain_128)

hx.set_power(hx711.power.pwr_down)

hx711.wait_power_down()

hx.set_power(hx711.power.pwr_up)

# 4. wait for readings to settle

hx711.wait_settle(hx711.rate.rate_10)

# 5. read values

# wait (block) until a value is read

val = hx.get_value()

# or use a timeout

if val := hx.get_value_timeout(250000):

    # value was obtained within the timeout period

    # in this case, within 250 milliseconds

    print(val)

# or see if there's a value, but don't block if not

if val := hx.get_value_noblock():

    print(val)

# 6. stop communication with HX711

hx.close()

```

## Alternatively, Use `with`

```python

with hx711(Pin(14), Pin(15)) as hx:

    hx.set_power(hx711.power.pwr_up)

    hx.set_gain(hx711.gain.gain_128)

    hx711.wait_settle(hx711.rate.rate_10)

    print(hx.get_value())

```