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Smart Scale - Advertising Analysis

Manufacturer Data​

def decode_weight(manufacturer_data):
    # Skip Company ID (first 2 bytes)
    weight_bytes = manufacturer_data[2:4]
    weight_raw = int.from_bytes(weight_bytes, 'big')
    weight_kg = weight_raw / 100
    return weight_kg

# Example
data = bytes.fromhex("c005780012c4")
weight = decode_weight(data)  # 78.50 kg

Privacy Violation​

  • Weight visible to ANYONE in 10m range
  • NO connection required
  • Purely PASSIVE eavesdropping
  • Tracking via MAC address possible