Pi Zero W is the new brain of the Open Cycling Computer. PiTFT 2.8" capacitive dosn't work out-of-the-box, but required modification are very simple.Modifications required in /boot/config.txt1. Uncomment dtparam=spi=on2. Add […]
Friday, March 31 2017
Friday, March 31 2017.
Sunday, February 8 2015
Sunday, February 8 2015.
It's a short guide to practical side of bluetooth LE using gatttool. How to read characteristics, turn on notifications and where to find more info about all those BLE numbers. I was strugging for a while to read data from a BLE heart rate strap. It was working flawlessly with android apps, but I […]
Sunday, December 7 2014
Python library for Raspberry PI for Ultimate GPS based on MTK3339 with serial interface as sold by Adafruit
Sunday, December 7 2014.
https://github.com/PrzemoF/mtk3339 Python library for Raspberry PI for Ultimate GPS based on MTK3339 with serial interface as sold by Adafruit. The library helps to set different chip parameters in a sane way. Currently supports minimum functional set of commands: CMD_HOT_START - hot_start() […]
Wednesday, November 12 2014
Wednesday, November 12 2014.
I was testing that  gps chip for a last few weeks - it was great, but it was preforming "cold start" every time it was turned on. Today I finally soldiered the battery holder and slided a CR1220 battery in. If you're using the same board without the battery get one immediately. Time to […]
Wednesday, October 15 2014
Wednesday, October 15 2014.
PiTFT capacitive doesn't require calibration according to Adafruit, but for some reason I couldn't make it work properly with vertical layout and the default values suggsted here . The default values are: 320 65536 0 -65536 0 15728640 65536 I needed to use the screen with Adafruit logo at the […]
Friday, August 22 2014
Friday, August 22 2014.
How to measure temperature and pressure with raspberry pi and BMP183 Requirements: - raspberry Pi - BMP183 with SPI by Adafruit - 6 wire female-to-female cable or any other to connect 6 pins between RPI and BMP183 Results: Temperature: 18.9 deg C Pressure: 1013.39 hPa RPI + BMP183: Schematic (png): […]