JJietion1d ago · 8 min readSatellite NTN and eSIM for IoT Beyond Terrestrial Coverage: What Buyers Should PlanDefinition: Satellite NTN for IoT extends cellular-standard connectivity through satellites or high-altitude platforms where towers do not reach; the eSIM holds the subscription profiles that let one liotsim.hashnode.dev
JJietion1d ago · 9 min readIoT SIM for Wireless Tank and Liquid-Level Control Systems: Telemetry, Alarms and Control LoopsDefinition: An IoT SIM in a tank or liquid-level control system carries level readings, pump states and alarms from the field controller to a remote platform over cellular, so operators can supervise liotsim.hashnode.dev
Ccircuitrocks1d ago · 2 min readPowered by Raspberry Pi: Photo Booths, Audio DSP and TabletsA party in France wraps up, two people fold a 35 kg photo booth flat, and a print slides out in under 30 seconds with a Raspberry Pi 5 running the whole show. That scene comes from the latest "Poweredcircuitrocks.hashnode.dev
CcircuitrocksOct 24 · 2 min readDoom Runs on a $30 Clamp Meter With Just 32 KB of RAMEvery few months someone ports Doom to a device that never asked for it: calculators, cameras, printers. The latest target is a $30 FNIRSI DMC-100 clamp meter with only 32 KB of RAM, and the Hackster circuitrocks.hashnode.dev
JJietionOct 23 · 9 min readGPS Tracker Reporting Intervals and Keep-Alive Timers: How Firmware Settings Drive Monthly UsageDefinition: For GPS trackers, an IoT SIM carries position reports, alarms and configuration traffic, so the tracker’s reporting interval and keep-alive timers decide how many megabytes each SIM uses pliotsim.hashnode.dev
SSergey SizovOct 22 · 4 min readI Built an AI OS That Evolves on DemandI built S1-ADV, an AI OS for the M5Stack Cardputer ADV, around a simple idea: the next feature starts with a request. An idea can move through AI-assisted development, a build, review and an approved s1z0v.hashnode.dev
DDisplayEngineerOct 22 · 7 min readWhy your ST7701S screen goes black after a reboot in ESPHomeThe bug report that sent me into ESPHome's reset code keeps showing up in slightly different forms. Someone flashes a Waveshare ESP32-S3-Touch-LCD-4 over USB and the 480×480 ST7701S panel comes up findisplayengineer.hashnode.dev
IiMLite GolfOct 20 · 10 min readGolf Course Data, Compressed: What Fits Inside 100KB Per HoleA golf course dataset is not road network data. Road networks answer "how do I get from A to B"; a course dataset answers "what will this shot pass over, and where will it land". Get the underlying mo1Iimlitegolf.hashnode.dev
DDisplayEngineerOct 19 · 10 min readESPHome Drops ili9xxx, st7789v and st7735 in 2027.5.0: Migrating SPI TFTs to mipi_spiESPHome has now put a date on the end of its legacy SPI display drivers. Four pull requests merged on 14 October 2026 (#20687 ili9xxx, #20688 st7735, #20689 st7789v, #20690 qspi_dbi) change the deprecdisplayengineer.hashnode.dev
YYunus Emre VurgunOct 18 · 13 min readYour 256-byte Q-table is lying to you: rounding, not memory, is what breaks RL on microcontrollersDisclosure: this article was written for Yunus Emre Vurgun, who wrote Fringe Learning: Resource-Efficient RL for Edge ML, a short practical guide linked at the end. The experiment below is small, runsyunusemrevurgun.hashnode.dev
