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Ths repo containts the software to implement a data-logger in Julia for an ocean surface drifter which also communicates the data over the cell phone network.

Table of contents:

  1. 💾 software installation
  2. ⚡ reduce power consumption
  3. 🚨 blinking leds
  4. ☎️ GSM modem
  5. ⚙️ configure drifter-diy.jl
  6. 🌊 notes for deployment
  7. 💻 Analysis of drifter data with the sample data and bathymetry.

Switch on/off

  • Connection via ssh
sudo shutdown -h now

Wait that green led is off, then disconnect power supply.

Start-up sequence

Approximate timings:

  • 4 min: to boot Rasberry Pi (under-clocked, with only 1 CPUs)
  • 30 s: start WaveShare Hat
  • 1 min: wait (so that peak power consumption does not coincides with GSM network registration)
  • 1 min: register to GSM network and send first SMS

Reference