BLOG.
What broke this week. What we learned doing the port. KiCad reviews, BLE protocol traces, OTA rollouts. Reading notes from the papers and standards we actually used.
Deep learning for N-1 security assessment in power systems
Neural networks can screen contingencies 300× faster than full AC power flow — at 98%+ accuracy. A survey of CNN, GNN, and DCNN approaches, the data problem, and where the field still struggles.
Machine Learning for Thermal-Soaring Optimisation: a Survey of Approaches, Architectures and Open Problems
A survey of deep learning and reinforcement learning for autonomous thermal soaring — LSTM/GRU/TCN/Transformer architectures, POMDP and PPO/TD3 formulations, Kalman + ML hybrid filtering, and a concrete five-stage plan for an on-board AI co-pilot for paragliders.
12 ARTICLES.
- 03#flybeeper #sun-vario #variometer
FlyBeeper Sun Vario: a Solar-Powered Bluetooth Variometer Under 8 Grams
A solar-powered BLE variometer that weighs under 8 g and never needs a battery change. Supercapacitor energy buffer, USB-C emergency charge in 60 seconds, 500,000 cycles, operating range -15 °C to +70 °C — designed as a primary vario for hike-and-fly paragliding.
6 min read - 04#flybeeper #fanet #lora
FlyBeeper FANET: a Bluetooth Bridge to the FANET Radio Network
An always-on BLE bridge to the 868 MHz FANET data network. No on-board GPS — the smartphone provides position, the device just radiates. Solar-powered, years of standby, full radio configuration over GATT so apps can transmit FANET, ADS-L or anything else on the same radio.
6 min read - 05#flybeeper #tas #airspeed
FlyBeeper TAS: a Bluetooth True-Airspeed Sensor with a Purpose-Built Pitot Tube
A purpose-built BLE true-airspeed sensor for paragliders and hang gliders up to 103 km/h IAS. Custom CFD-designed pitot tube with a 4% correction coefficient versus 50% for hobby tubes, four PCB revisions ending in USB-C supercap charging, and standards-compliant BLE GATT services.
9 min read - 06#flybeeper #ps1 #pressure-sensor
FlyBeeper Pressure Sensor: an Always-On Bluetooth Barometer for Flight Apps
An external BLE pressure sensor for paragliding flight apps like xcTrack and SeeYou Navigator. Always on, pair once and forget — wakes the moment the app subscribes to ESS pressure notifications. ±2 cm/s vertical-speed resolution from an SPL06, 5-year standby on a single CR2032.
5 min read - 07#flybeeper #rc4 #remote-control
FlyBeeper Remote Control 4: a Bluetooth Four-Button Remote with Multi-Year Battery Life
An always-on four-button BLE remote for paragliding flight apps. No power switch, deep-sleep when idle, automatic wake when an app connects — battery life measured in years from a single CR2032. Built on Nordic nRF52, exposes the standard Automation IO Service.
3 min read - 08#flybeeper #mini-bt #variometer
FlyBeeper mini BT: a Tiny Bluetooth Variometer Built on Zephyr RTOS
A dwarf-sized BLE 5 variometer on nRF52 + Zephyr RTOS, exposing pressure, temperature, altitude, four-button remote and OTA updates through standards-compliant GATT services. The entire stack — GPIO, SPI, PWM, ADC, FLASH, OTA, DFU, BLE, GATT, plus the OS — fits in 200 kB.
18 min read - 09#flybeeper #canflybot #telegram-bot
CanFlyBot: a Telegram Bot That Tells You When the Next Good Soaring Day Is Coming
A Telegram bot that wraps the Paraglidable AI forecast and Meteoblue thermal soundings for paragliding pilots. Tracks 10,000+ take-off and landing spots, pings you when probabilities exceed your thresholds, and serves detailed thermal diagrams on demand.
6 min read - 10#flybeeper #f1 #test-flight
FlyBeeper F1 Field Test Report (May 15, 2022)
Five hours, three F1 units, two GPS antennas, one RF interference incident over Cividale. Notes on GPS lock quality, vario behaviour, BLE companion app, and a Tagliamento-crossing flight across the Julian Alps.
3 min read - 11#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 - 12#flybeeper #horn #variometer
FlyBeeper Horn: a Variometer-Whistle for Paraglider Pilots
The smallest variometer in the FlyBeeper line, doubling as an emergency whistle and acoustic distress beacon. A demanding miniature project that combines tight PCB design, a composite CR2032 holder, and a 3D-printed enclosure that has to actually whistle.
2 min read
| 2026 | 2 posts → |
| 2024 | 2 posts → |
| 2023 | 5 posts → |
| 2022 | 3 posts → |