Dependencies¶
This driver depends on:
Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle.
Installing from PyPI¶
On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:
pip3 install adafruit-circuitpython-ds1841
To install system-wide (this may be required in some cases):
sudo pip3 install adafruit-circuitpython-ds1841
To install in a virtual environment in your current project:
mkdir project-name && cd project-name
python3 -m venv .env
source .env/bin/activate
pip3 install adafruit-circuitpython-ds1841
Usage Example¶
from time import sleep
import board
import busio
import adafruit_ds1841
from analogio import AnalogIn
####### NOTE ################
# this example will not work with Blinka/rasberry Pi due to the lack of analog pins.
# Blinka and Raspberry Pi users should run the "ds1841_blinka_simpletest.py" example
# WIRING:
# 1 Wire connecting VCC to RH to make a voltage divider using the
# internal resistor between RH and RW
# 2 Wire connecting RW to A0
i2c = busio.I2C(board.SCL, board.SDA)
ds1841 = adafruit_ds1841.DS1841(i2c)
wiper_output = AnalogIn(board.A0)
while True:
ds1841.wiper = 127
print("Wiper set to %d"%ds1841.wiper)
voltage = wiper_output.value
voltage *= 3.3
voltage /= 65535
print("Wiper voltage: %.2f"%voltage)
print("")
sleep(1.0)
ds1841.wiper = 0
print("Wiper set to %d"%ds1841.wiper)
voltage = wiper_output.value
voltage *= 3.3
voltage /= 65535
print("Wiper voltage: %.2f"%voltage)
print("")
sleep(1.0)
ds1841.wiper = 63
print("Wiper set to %d"%ds1841.wiper)
voltage = wiper_output.value
voltage *= 3.3
voltage /= 65535
print("Wiper voltage: %.2f"%voltage)
print("")
sleep(1.0)
Contributing¶
Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.
Documentation¶
For information on building library documentation, please check out this guide.