This video documents the design process behind a one-off prototype precision pressure meter. This device can measure pressure to one ten-thousandth of a PSI! Here I demonstrate the design process including reading the datasheet to figure out the I2C commands, using a Bus Pirate to practice exchanging data with the sensor, using a logic analyzer to sniff the I2C lines, using Python and a Bus Pirate to record and graph temperature and pressure data, and finally building it all into an enclosure controlled by an ATMega328 microcontroller.
Project page:
https://www.swharden.com/wp/2017-04-29-precision-pressure-meter-project/
Code (AVR-GCC):
https://github.com/swharden/AVR-projects/tree/master/ATMega328%202017-03-19%20i2c%20LCD%20pressure%20sensor
Pressure sensor breakout board:
http://www.icstation.com/ms5611-pressure-altitude-sensor-module-24bit-converter-p-10426.html
