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#ble.
Posts on the Alpisto engineering blog filed under #ble.
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- 01#flybeeper #fanet #ads-l
Teaching a LoRa vario to hear ADS-L, and finding the time to do it
An ADS-L receiver must know when each UTC second starts, and receivers normally get that from GNSS. My vario has no GNSS on purpose: its position comes from the pilot's phone. So I took the time from the phone too, over Bluetooth, and measured how accurate that is. It is accurate enough, with room to spare: the share of frames the device caught went from 15 % to between 50 and 100 %.
19 min read - 02#flybeeper #f1 #fanet
FlyBeeper F1: a Compact FANET-Capable Flight Instrument
A pocket-sized paragliding flight instrument with GNSS, barometer, 868 MHz LoRa FANET, BLE 5.0 and on-board logging. Built as both a FANET tracker and the main vario, with a long development log covering hardware, firmware, FAI-recognised IGC validation and a Web BLE configurator.
8 min read