Author: Cont
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Discovery 3 CAN Bus, Part 7: Cracking the Ford Security Algorithm
Before you can write calibration data to an ECU, you need to pass Security Access. We found the Ford KeyGenMkI algorithm, confirmed the 24-bit LFSR seed in SecAlg.dll,…
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Discovery 3 CAN Bus, Part 6: Reverse Engineering JLR SDD for Air Suspension Diagnostics
Going deeper into the Discovery 3 air suspension: we downloaded JLR SDD 130, extracted the dealer diagnostic VM, and found the service action plugins, VERONA CAN protocol layer,…
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Discovery 3 CAN Bus, Part 9: Building Our Own UDS Diagnostic Tool
Building a Python UDS diagnostic tool for the Discovery 3 air suspension RLM module. Using a LilyGO ESP32 CAN board with full ISO-TP transport, Ford KeyGenMkI security unlock,…
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Discovery 3 CAN Bus, Part 8: The LilyGO CAN Transceiver TX Saga
We spent weeks trying to transmit CAN frames from the LilyGO ESP32 board. Frames were received perfectly but nothing would transmit. The fix? Two GPIOs we never knew…
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Land Rover Discovery 3 Intake Manifold Replacement: Alloy vs OEM — What Australian Owners Need to Know
Cast aluminium intake manifolds are emerging as a durable alternative to the OEM plastic part for Land Rover Discovery 3 and 4. We cover install tips, common pitfalls…
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Free Online Gridfinity Bin Generator: Create Custom STL Files for 3D Printing
Use TekOnline’s free online Gridfinity bin generator to create custom STL files for 3D printing. Set bin size, height, holes, label lip, scoop and dividers.
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Open-Source Vaccine Fridge Monitor: We’re Building One. Want In?
We’re exploring an open-source, clinic-owned temperature monitoring system for vaccine fridges and medical refrigerators. No subscriptions. No cloud lock-in. You own the device, the data, the firmware, and…
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8-Zone V1/V2 Firmware v2026-05-17: Downloads and Upgrade Guide
Update TekOnline eight-zone V1 or V2 firmware: choose the correct board file, configure relay inversion and install over USB or ESPHome OTA.
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4-Zone Wall Controller Firmware v2026-05-17: Relay Inversion, OTA Updates, and Version Display
Update the TekOnline four-zone wall controller with relay inversion, ESPHome OTA and firmware-version diagnostics. Check the correct setup instructions.
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4-Zone Wall Controller Firmware Update: Latest Features for Existing Customers
Explore firmware features for the TekOnline four-zone button wall controller, including local controls and Home Assistant integration.