I haven’t updated much on the satellite tracker but I figured I would make the repo public since it is just sitting there at the moment. :) https://github.com/bostrt/sattrack https://github.com/bostrt/libpredict-arduino-lib I plan to work on this some more before upcoming DEF CON 26.
Things are progressing nicely on the satellite tracker. The following is functional: libpredict modified to work on Adafruit Feather M0 Real-time clock with battery backup complete Storage for configs complete OLED display working and displaying data calculated by libpredict USB Serial interface for configuring location, callsign, TLE’s, and time (in case RTC loses battery power) Current tasks Develop a dev pcb to replace bread-board. Just something that all the breakout boards above solder onto Finish display graphics code-cleanup Screenshot & Photos Serial interface All components Polar chart that will display relative satellite position Missing photo of the satellite position data due to being in middle of display code rewrite. ...
After some fighting with libpredict, I found that I am going to need a microcontroller with better floating-point support. The Atmega series of microcontrollers do not have an FPU which means any floating-point support is hard (either inaccurate, slow, or hacked). I found that some of the ARM Cortex processors do indeed have an FPU and their also come in similar form as Arduinos or other development boards: https://www.adafruit.com/product/2772 ...