README.md

The very beginnings of a set of Ansible playbooks for Direwolf on a Raspberry Pi as a basic digipeating GPS beacon.

Wiring Plan

Raspberry Pi Pinouts

• GPIO26 + GND: R/W Switch (https://learn.adafruit.com/read-only-raspberry-pi)
• Raspberry Pi side of EasyDigi
  • TRRS USB Sound Card
    • 0 (Tip, Red): Audio to EasyDigi
    • 1 (Ring 1, White): Ground
    • 2 (Ring 2, Green): Audio to EasyDigi
    • 3 (Sleeve, Black): Audio from EasyDigi
  • GPIO25: RTS on EasyDigi
  • GND: Ground on EasyDigi
• Radio side of EasyDigi
  • Mic Connector (left to right looking into connector)
    • 1 (8 on patch, green pi connector, brown on wire): PTT ground from EasyDigi
    • 2 (7 on patch, blue pi connector, brown/white on wire): PTT positive from EasyDigi
    • 3 (6 on patch, green on wire): Audio out from EasyDigi
    • 4 (5 on patch, blue/white on wire): Audio ground From EasyDigi
  • Mono plug for back of radio
    • Tip: Audio into EasyDigi
    • Ring: Ground
• Display, SSD1306
  • Listing: https://www.banggood.com/0_91-Inch-128x32-IIC-I2C-Blue-OLED-LCD-Display-DIY-Oled-Module-SSD1306-Driver-IC-DC-3_3V-5V-p-1140506.html
  • Driver: https://learn.adafruit.com/monochrome-oled-breakouts/python-wiring
  • GND: Ground
  • VCC: 3.3v
  • SCL: Pi SCL
  • SDA: Pi SDA

Bonus: TNC3

TNC3 -----------------> Radio

Tip:    TNC Audio In <------------ Mono Tip (Audio out)
Ring 1: PTT ---------------------> Eth 2 / Brown-White (PTT)
Ring 2: TNC Audio Out -----------> Eth 3 / Green (Mic)
Sleeve: Ground <-----------------> Eth 1 / Brown (PTT Ground)
               <-----------------> Eth 4 / Blue-White (Mic Ground)
               <-----------------> Mono Ring (Audio out ground)

Bonus: iPad Cable

• TRRS (iPad Side):
  • 0 (Tip): Null
  • 1 (Ring 1): Ground
  • 2 (Ring 2): Null
  • 3 (Sleeve): Audio from radio (sleeve)
• Mono Plug (Radio Side):
  • Tip: Audio (TRRS sleeve)
  • Ring: Ground