robinsonz / arduino-serial-sensor-comm

Read sensor status from an Arduino over the serial port

arduino-serial-sensor-comm

Read sensor status from an Arduino over the serial (USB) port. A Python client is provided, but the protocol used should be able to be read in any programming language that supports numbers.

This repository contains two pieces of code:

Arduino server

A simple sketch to transmit the state of DIO pins 2–12 and AIO 0–5 over the serial USB connection on an Arduino Uno. Requires base64_arduino.

Transmits a packet roughly 100 times per second; this can be adjusted by changing the value given to delay() at the bottom.

Packet format

Type	Description	Byte #
Raw bits	5 bits of 0-padding followed by DIOs 2–4 in order	0
Raw bits	DIOs 5–12 in order	1
int16	6 2-byte ints for each analog channel	2–13
byte	Checksum	13

This is then Base64-encoded and a trailing newline is added. All numbers are transmitted big-endian.

Python client

A simple Python 3 client to read the aforementioned data packets from a serial port (the address of which can be changed by modifying line 3) and print them to the console. Requires PySerial.