I built Smart Unlock as a connected-access project at Scheidt & Bachmann. A phone beacon simulator and an ESP32 WROOM-32 scanner test a keyless access decision; a matched Eddystone identifier triggers the door-relay proof and publishes status through Mosquitto MQTT.
Connected access project at Scheidt & Bachmann02 /Product experience
What the product does.
01BLE Access Flow2 capabilities
Beacon Scanning
ESP32 firmware scans nearby Eddystone advertisements and filters the expected beacon identifier.
Identifier Check
The proof of concept compares detected UID or URL data before allowing the hardware response.
02Hardware Proof2 capabilities
Relay Simulation
An LED represents the door-relay action so the access decision can be tested safely on the bench.
MQTT Status
Mosquitto messaging publishes access events and prototype device status for remote observation.
03Testing1 capabilities
Beacon Simulator
A phone-side beacon simulator provides repeatable BLE advertisements for testing the scanner flow.
03 /System design
How the pieces connect.
System workflow
Smart Unlock access flow
A phone beacon becomes a verified hardware action and a remotely observable access event.
BLE-to-lock path
Access signal
Phone beacon simulatorBroadcasts an Eddystone UID or URL
BLE advertisement
Edge decision
ESP32 scannerScans nearby advertisements
Identifier filterChecks the expected beacon data
Recognized access
Hardware and status
LED relay proofRepresents the door-lock action safely
Mosquitto MQTTCarries access and device-status events
Bench-tested enclosureHouses the scanner and visible status indicator
01System Architecture
A phone beacon simulator broadcasts an Eddystone identifier. The ESP32 scans and filters the advertisement, triggers an LED as the lock-relay proof, and publishes event or status messages to Mosquitto over MQTT.
04 /In action
A closer look at the build.
Actual project screens and documented visuals. Open any image for the full view.
ESP32 scannerScans nearby advertisements
LED relay proofRepresents the door-lock action safely
Bench-tested enclosureHouses the scanner and visible status indicator