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Python Class for Reading Single Edge Nibble Transmission (SENT) using the Raspberry Pi

A full description of this Python script is described at www.surfncircuits.com in the blog entry: Implementing a Single Edge Nibble Transmission (SENT) protocol in Python for the Raspberry Pi Zero

This python library will read a Raspberry Pi GPIO pin connected. Start the pigpiod daemon with one microsecond sampling to read SENT transmissions with three microsecond tick times.

To start the daemon on Raspberry Pi

sudo pigpiod -s 1

SENT packet frame summary

Sync Pulse: 56 ticks
4 bit Status and Message Pulse: 17-32 ticks
4 bit (9:12) Data1 Field: 17-32 ticks
4 bit (5:8) Data1 Field: 17-32 ticks
4 bit (1:4) Data1 Field: 17-32 ticks
4 bit (9-12) Data2 Field: 17-32 ticks
4 bit (5-8) Data2 Field: 17-32 ticks
4 bit (1-4) Data2 Field: 17-32 ticks
4 bit CRC: 17-32 ticks

requirements

pigpiod library required

To run the script for a signal attached to GPIO BCD 18 (pin 12)

python3 sent_READ.py

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