IoT Detector
An ESP8266 that notices nearby phones by listening to WiFi probe requests.
- Role
- Hardware & firmware
- Year
- 2023
- Stack
- C++, Arduino, NodeMCU
A NodeMCU (ESP-12E) running in promiscuous mode that passively detects nearby phones from their 802.11 probe requests — no app, no pairing.
Detections trigger an LED and buzzer in real time.
What went into it
- 802.11 promiscuous mode
- Passive device detection
- Hardware alerts