Beacon Site Survey & RF Planning: From Floor Plan to Reliable Coverage
A Bluetooth Beacon deployment that looks perfect on a floor plan often falls apart in the real building. Drywall, shelving, freezers, and human bodies all eat RF, and a 3…
Bluetooth Module Secure Boot: Firmware Signing and Root of Trust
Ship a Bluetooth module with unsigned firmware and you have implicitly trusted anyone who can flash it. A competitor clones your product, an attacker drops a backdoor, or a bad…
BLE Tag Anti-Tracking Protection: Engineering Unwanted-Tracking Detection
A standard BLE Tag is a coin-sized beacon you clip to keys, a laptop, a pallet, or a patient wristband so you can find it later. That same convenience is…
Relay Bluetooth Beacon: Extending Coverage Past the Gateway Horizon
A standard Bluetooth Beacon just broadcasts. It wakes from a timer, pushes an advertising packet, and goes back to sleep. The model assumes a gateway or smartphone is within radio…
Your Bluetooth Module Draws More Than the Datasheet Says. Here’s the Real Number.
An engineer sent me a screenshot: his Bluetooth module pulled 9 milliamps in sleep, and the datasheet promised 1.8. He'd designed the battery around the 1.8. The chip wasn't broken.…
Your BLE Tag Says 200m. You Get 20. Here’s the Gap, Measured.
A buyer forwarded me a datasheet: "200 meters." He'd stuck the BLE Tag on a pallet, and it dropped off the gateway at nineteen meters past the door. The number…
Beacon with Integrated Sensors: Environmental Sensing, Data Encoding, and Edge Triggering
A plain advertising beacon only answers one question: "where is this tag?" Add a sensor — temperature, humidity, acceleration, light — and the same hardware becomes a distributed measurement node…
Why Is My Beacon RSSI Jumping? The Causes, and What Actually Fixed Them
A warehouse supervisor showed me a graph that looked like a heartbeat on espresso. The RSSI from one Beacon was swinging forty decibels every few seconds, and his location engine…
External Antenna or Chip Antenna for Your Bluetooth Module? Here’s What Decides It
A customer sent me two boards with the same Bluetooth module on each, one with a chip antenna and one with a whip on the edge. The whip beat it…
Beacon Clock Synchronization and TDOA Positioning: Sync Methods, Timestamping, and Accuracy Budget
Time Difference of Arrival (TDOA) positioning is one of the most accurate approaches in BLE-based indoor localization—but it places the most demanding requirement on the system: all receiving beacons (anchors)…