Program for device to configure Mavlink modems (mainly used with ArduPilot) without PC
Mavlink modem AT commands:
Copied and customized next projects' code to add support of Ukrainian language:
- https://github.com/adafruit/Adafruit-PCD8544-Nokia-5110-LCD-library
- https://github.com/adafruit/Adafruit-GFX-Library
Device prototype
Building an Arduino on a Breadboard https://www.arduino.cc/en/Main/Standalone
Features:
- use matrix keypad, nokia 3310 display (via software SPI) and mavlink modem via hardware Serial interface;
- save modem configurations into profiles into EEPROM. Ability to read and view;
- create user interface and use 4 buttons to navigate (up, down, enter, escape);
- Ukrainian user interface;
Secon development phase, items TODO:
- use hardware SPI to communicate with nokia display (done);
- create custom keypad using input shift register 74HC165 to save arduino pins. Use interruptions for key events (done);
- add ability to configure the device. Save configurations into EEPROM (added serial port speed select);
- add English user interface and ability to swith between Ukrainian and English. Save text messages into external EEPROM (done);
- use special logic level converter chip instead of voltage divitor based on resistors for nokia display (not needed);
- use 5V to 3.3V converter for nokia display;
- save memory slots into external eeprom;
LCD connector pins:
- 1 - VCC 3.3V
- 2 - GND
- 3 - SCE
- 4 - RST
- 5 - D/C
- 6 - DN
- 7 - SCLK
- 8 - LED
Keypad connector pins:
- 1 - GND
- 2 - VCC
- 3 - Q7 inverted (7 pin on chip)
- 4 - SCK (2 pin on chip)
- 5 - PL (1 pin on chip)
- 6 - INT (connect to interruption pin on arduino)