modem-myriota

Code to utilize the Myriota Developer Toolkit as a modem

Environment Setup

https://developer.myriota.com/install-sdk

Usage

Real Satellites

cd src
make clean; make
updater.py -u -leuart-tracker.bin -s -l

Satellite Simulator

cd src
make clean; SATELLITES=LabWithLocation make
updater.py -u -leuart-tracker.bin -s -l

Sending Data

The Myriota module functions as a modem in this application.

Sensor/controller MCU should send data to the Myriota module using the LEUART pins.

┌────────────────┐                 ┌─────────────────┐
│                │                 │                 │
│                │                 │                 │
│     SENSOR     │                 │     MYRIOTA     │
│    PLATFORM    │                 │     MODULE      │
│       /        │                 │                 │
│      MCU       │                 │                 │
│                │                 │                 │
│            3.3V├─────────────────┤VEXT             │
│                │                 │                 │
│             GND├─────────────────┤GND              │
│                │                 │                 │
│              RX├─────────────────┤LEUART_TX        │
│                │                 │                 │
│              TX├─────────────────┤LEUART_RX        │
│                │                 │                 │
└────────────────┘                 └─────────────────┘

The modem expects to receive two bytes which are treated as a uint16_t. Each new data message is added to the sensor_data variable.

Messages are sent using the BeforeSatelliteTransmit function to reduce latency between sensor readings and satellite transmission.