TLMscope shows what happened during your flights. It reads the telemetry logs (.TLM files) that Spektrum transmitters save, and turns them into flight summaries, charts and simple ratings.
You can use it if you fly a model with a Spektrum telemetry receiver and your Spektrum transmitter saves telemetry logs.
Transmitters
What you can see, and what it needs
A log only contains what the sensors in your model sent. Missing hardware means missing data, not an error.
Not supported
- EdgeTX / OpenTX logs (CSV, e.g. RadioMaster, FrSky, ExpressLRS, Crossfire): planned, not available yet.
- Other radio systems with their own log formats (Jeti, Graupner HoTT, Futaba, Multiplex …).
- Flight controller logs (ArduPilot, Betaflight blackbox, iNav).
- Spektrum transmitters that cannot save telemetry logs (e.g. DX6i).
- Live telemetry during the flight. TLMscope works with the saved files afterwards.
- Changing settings on the transmitter or receiver. TLMscope only reads.
- Cars and boats (Spektrum surface radios) are not a focus. Their logs may partly work.
Your data stays with you
Files are read in your browser and never uploaded. There is no account, no cookies and no server that stores your data. Only anonymous page views are counted (Umami, without cookies and without anything from your files). One exception: for logs with GPS, the map on the Flight path tab loads map images from OpenFreeMap (tiles.openfreemap.org). Like any website, that service sees your IP address and which map area is requested, so roughly where the flight was. Your log file itself is not sent.
Without internet
After one visit with internet, TLMscope is stored in your browser and also opens without a connection, for example at the flying field. Once it is ready, the footer says “Works offline”. On iPhone and iPad, add it to the home screen, otherwise Safari deletes it after some days without use. Only the map needs internet.
How to get your log files
- NX and iX: connect the transmitter by USB, choose the option to access internal storage in the USB settings, then copy the
.TLM files. - DX with SD card: take the SD card out and copy the
.TLM files.
About
TLMscope is made by Andreas Knoor. It started as a way to understand my own RC flights better than the transmitter screen allows. It is free, has no ads, and the source code is open. Ideas, questions and bug reports are welcome on GitHub.
TLMscope on GitHub · Imprint & privacy
TLMscope is an independent project, not made or endorsed by Spektrum or Horizon Hobby.