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Estimate location based on nearby WiFi Access Points and their RSSI.
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README.md

WiFi Position System

A wemos d1 mini (esp8266) is used to scan for ssid broadcasts once, then send connect to a wifi and send the result via mqtt. On the server the rssi and AP MAC addresses can be compared to previously saved locations. After the values have been sent the esp goes into deep sleep for a set amount of time. If the device is mounted to something the wake up can be triggered via a shock sensor. In this case the position is only updated when it has been moved.

Hardware

  • ESP8266 (Wemos D1 Mini).
  • 3x AA Battery Holder (Connect to 3V3 and GND).
  • 3x AA Batteries (Use partially emptied alkaline Batteries or NiMh rechargables. Max 3.8V)
  • Optional: Shock sensor (spring type, that connects to contacts when bumped). Connect between D0 and RST.
    • If no shock sensor is used connect D0 to RST to enable wake up by timer.
  • 10k and 4.7k resistor. Connection: 3V3 - 4k7 - A0 - 10k GND