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Arduino and rust server files for the esp32 heart pair project.

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esp32-heart-pair

All the files for the esp32 heart pair project.

Outline

At any given time, we can assume that at most only 1 pair is connected to the server. Thus, when one device connects to a server, the server will automatically pair it with the next device that connects to the server. We assume that device-level programs have no lag, but that device-server messages will.

Components

  • Heart Device A
    • Display paired BPM & mood with pulses
    • Replicate beat with one high intensity, one low intensity
    • Beat color is pink by default, changes based on opposing mood
    • Timed based on known latency and last beat time
  • Heart Device B
  • Trigger App
    • Detect two volume-up as STOP
    • Detect two volume-down as START
  • Configuration App A
  • Configuration App B
  • Handler Server
    • Get ping from device return messages, filter with weighted average
      • Keep a hashmap of sent update UUIDs and their respective send times, throw out any that are too old
      • When a GOT_UPDATE message is received, find the UUID and the send time and use receive time to update the ping

Messages

  • Trigger: Trigger -> Server

    • Message Type (TRIGGER)
    • Message Data (None)
  • Stop: Trigger -> Server

    • Message Type (STOP)
    • Message Data (None)
  • Server Update: Server -> Device

    • Message Type (SERVER_UPDATE)
    • Message Data
      • Update UUID
      • Measured BPM (optional)
      • Time from last beat peak
      • Trigger State (optional)
      • Estimated total latency
  • Client Verification Ping: Device -> Server

    • Message Type (GOT_UPDATE)
    • Message Data
      • Update Message UUID
  • Client Update: Device -> Server

    • Message Type (CLIENT_UPDATE)
    • Message Data
      • Measured BPM (optional)
      • Time from last beat peak

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Arduino and rust server files for the esp32 heart pair project.

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