Learn · Live data
Telemetry
How live data actually moves: refresh rates by bus, PID latency over Bluetooth, logging, and the readings that disagree.
Telemetry · E39
Battery voltage: the four places your car reports it
The battery posts, the adapter's pin 16 reading, OBD-II PID 0x42 and the engine computer's own figure: what each measures and why they disagree.
Read ›Telemetry · E36, E39, E46
Why Bluetooth live data feels slow
One request, one answer, one gauge at a time: why an ELM327 adapter slows down as you add gauges, and why K-line cars refresh slower than CAN cars.
Read ›Telemetry · Universal, BMW, Toyota GR86, Mazda MX-5 Miata
OBD2 Polling Rate for Track Telemetry: Why More Channels Make Every Channel Slower
A technical guide to OBD-II polling, per-channel sample rates, CAN access, and track-day telemetry configuration.
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