Over 10 years we help companies reach their financial and branding goals. Engitech is a values-driven technology agency dedicated.



411 University St, Seattle, USA


+1 -800-456-478-23

English OpenMower Technology

Programming and Debugging a Raspberry Pi Pico from a Rasperry Pi 4’s GPIO header

The Goal The OpenMower mainboard consists of two independent computers: The Raspberry Pi 4 as main computer and the Raspberry Pi Pico microcontroller as low level controller. The Pico basically handles all small real-time tasks (sensor communication, …), whereas the Raspberry Pi 4 does the heavy lifting (navigation, …). The Raspberry Pi Pico can be […]

English Technology

Don’t use /dev/ttyS0!

Last summer I started working on an Open Source Robotic Lawn Mower project. In my prototype, I connected the Ardusimple RTK GPS board to the first hardware serial port of the Raspberry Pi 4 and everything seemed to work fine until it didn’t. I noticed that the GPS suddenly seemed to send invalid NMEA sentences. […]