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Project guide
Overview
You can't spell "Bluetooth" without "CLUE"! Or, I guess, you can try, but you'll just be left with "Btooth". Either way... the Cluetooth Scanner is a passive BLE advertisement scanner that runs on the CLUE!
Do you want to know what kind of BLE devices are in your vicinity? The Cluetooth Scanner listens for advertising packets from nearby devices and displays information about them.
Info can include:
- Name - the device's advertised local name if present
- RSSI (signal strength) - received signal strength in dBm
- Address - the device's MAC address, either public (permanent, manufacturer-assigned) or random (device-generated, which may be rotated for privacy)
- Company - decoded from the Manufacturer Specific Data (MSD) company ID bytes
- Chip - the silicon vendor inferred from the OUI (first 3 bytes of a public MAC address), e.g. Espressif for ESP32-based devices
- Services - advertised GATT service UUIDs decoded to profile names where known
- Appearance - standardized Bluetooth SIG device category code
- Apple Type - apple Continuity message subtype
- Guess - a best-guess device type for Apple devices based on advertisement payload analysis
- Scan count - how many times the device has been detected across scan cycles
Do you feel like you just don't have a CLUE? Well, we can help with that - get a CLUE here at Adafruit by picking up this sensor-packed development board. We wanted to build some...
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Page last edited June 01, 2026
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