Digital Hall Sensor Wireling Python Tutorial
This Wireling lets you measure the intensity of magnetic fields using the TCS40DLR Discrete Hall Switch.
Toshiba TCS40 Hall Switch Specs (Digital)
- Omnipolar (dual detection)
- ßON = 3.4mT
- ßOFF = 2.0mT
- Operating Voltage: 2.3V - 5.5V
- Operating Current: 1.0mA
- Voltage: 3.0V - 5.5V
- A5/SCL - I²C Serial Clock line
- A4/SDA - I²C Serial Data line
- 10mm x 10mm (.394 inches x .394 inches)
- Max Height (from the lower bottom of Wireling to upper top Wireling Connector): 4.60mm (0.18 inches)
- Weight: 1 gram (.04 ounces)
- Raspberry Pi and any other cables you'll need!
- Wireling Pi Hat
- (1) Wireling Cable
- Digital Hall Wireling
- Python 3 (Python 2 is not supported!)
- All Python packages mentioned in the Pi Hat setup tutorial (tinycircuits-wireling, Adafruit-Blinka, adafruit-circuitpython-ads1x15, and adafruit-circuitpython-busdevice)
Plug your Wireling into the port you plan on using! The default in the included program is port 0.
If you want to use a different port, you just need to change the port value in the program mentioned later.
The Wireling Python package includes helper functions that make I/O programming, like for a digital hall switch, easy. There is even an I/O example for reading the digital signal in the Wireling package that we will use here:
# Wireling Simple Input Example # This example can be used with the Large Button, Small button, Switch, # and Digital Hall Sensor Wirelings to read the digital state import time import tinycircuits_wireling wireling = tinycircuits_wireling.Wireling() while(True): wireling.digitalRead(0) # Insert 0-3 correlating with the port label on pi hat time.sleep(0.2)
Navigate in the terminal to the Wireling examples folder and type:
After you run the program, you should see a 1 printed to signify a HIGH state every 0.2 seconds. Once you hold a magnet close enough to the Digital Hall Wireling, you should see a 0 printing every 0.2 seconds as it is still pressed to signify a LOW state.
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