Knudt designed this board to connect an inexpensive dual-band GSM module with to an Orange Pi or Raspberry Pi:
SMS for Orange Pi / Raspberry Pi
The config files and EAGLE design files can be downloaded from the Hackaday.io project:
Knudt designed this board to connect an inexpensive dual-band GSM module with to an Orange Pi or Raspberry Pi:
The config files and EAGLE design files can be downloaded from the Hackaday.io project: