Phone Watch

An ESP32-based device that detects when a phone is removed and records the event locally.

The Problem

I wanted to build a device that could tell me when my phone had been physically removed while I wasn't around. Instead of requiring the phone to be placed on the device or connected to it, I designed this device as a separate station that sits near the phone.

How it works

• The ESP32 creates its own local network and shares the events on its webpage (Phone Returned and Phone Removed).
• Each transition is recorded as an event. The device keeps a rolling history of the 10 most recent events.
• The IR sensor continuously monitors the area in front of the device.

Elements used

• ESP32
• 4×AA batteries and a battery holder
• Jumper wires
• LEGO pieces for the enclosure
• IR obstacle avoidance sensor

Gallery