Moitessier HAT - a short Introduction

The Moitesser HAT is named after the famous sailor Bernard Moitessier. It is all-in-one navigation solution for the Raspberry Pi (and compatible) and provides the following features:

• High-sensitivity dual AIS receiver (159.000 MHz to 162.025 MHz, -114dBm)
• High-performance GNSS receiver (embedded patch antenna and external antenna support)
• Sensors (depending on assembly option):
  • Temperature
  • Pressure
  • Humidity
  • 9-axis (gyroscope, accelerometer and magnetometer)
• I2C boot loader (firmware update via Raspberry Pi)
• Standalone usage or in combination with Raspberry Pi (standalone usage requires 3.3V power supply)
• Fully compatible with Raspberry Pi models supporting 40-pin IO header
• 3 status LEDs
• IO headers to interface with spare GPIOs of the Raspberry Pi
• UART signals of Raspberry Pi available on header
• Supports ID EEPROM and automatic driver loading

The Moitessier HAT is fully compatible with OpenPlotter, but might be used with any navigation software that can use TTY devices as input source.

The communication with the HAT is established via the device files /dev/moitessier.spi or /dev/moitessier.tty, depending on whether you want to use TTY or SPI compatible access. To configure the HAT (e.g. receiver frequency, GNSS enable/disable etc.) or read device information you have to use /dev/moitessier.ctrl. See section using the HAT for further information.