# External References

Vendor documentation that the WII5 buoy firmware was developed against.
These documents are not redistributed in this repository (their licensing is
unclear); refer to the vendor sites for current copies.

## Iridium 9602 / 9603 SBD modems

Used for satellite telemetry. Key reference is the **Iridium 9602 / 9603
SBD Transceiver Developer's Guide** (AT-command set, SBD message lifecycle,
binary message framing for `+SBDWB` / `+SBDI`).

- Iridium developer portal: https://www.iridium.com/services/iridium-sbd/
- Search the Iridium partner network for the current "9602/9603 Developer
  Guide" PDF.

Relevant code: `WII5Iridium.cpp`, `WII5SerialManager.cpp` (`+SBDWB`,
`+SBDI`, `+CSQ` parsing), `WII5BinData.*` (340-byte message format).

## Sparton AHRS-M1 / AHRS-M2

Used as the primary IMU / wave-motion sensor. Key references:

- AHRS-M1 / AHRS-M2 Software Interface Control Document
- AHRS-M1 / AHRS-M2 Hardware ICD
- NorthTek Programming Manual (Sparton's Forth-like configuration language;
  the `programLine()` helpers in `WII5SerialManager.cpp` emit NorthTek
  commands).

- Sparton (now Bel Power Solutions / part of Bel Fuse) documentation:
  https://www.belfuse.com/

Relevant code: `WII5Sparton.cpp`, `WII5Setup.cpp` (compass/AHRS init).

## Other components

- **Dallas DS18B20** — temperature sensor:
  https://www.analog.com/en/products/ds18b20.html
  (Used in `WII5Weather_18B20.cpp` via the OneWire / DallasTemperature
  Arduino libraries.)
- **TinyGPS++** — NMEA parser library:
  https://github.com/mikalhart/TinyGPSPlus
- **u-blox NEO-6M / NEO-7M** — GPS module datasheets (NMEA reference):
  https://www.u-blox.com/