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* Add vitepress tree * Update existing workflows so they dont trigger on changes in the docs path * Add nojekyll, package.json, LICENCE etc * Add crowdin docs upload/download scripts * Add docs flaw checker workflows * Used docs prefix for docs workflows * Crowdin obvious fixes * ci: docs move to self hosted runner runs on a beefy server for faster builds Signed-off-by: Ramon Roche <mrpollo@gmail.com> * ci: don't run build action for docs or ci changes Signed-off-by: Ramon Roche <mrpollo@gmail.com> * ci: update runners Signed-off-by: Ramon Roche <mrpollo@gmail.com> * Add docs/en * Add docs assets and scripts * Fix up editlinks to point to PX4 sources * Download just the translations that are supported * Add translation sources for zh, uk, ko * Update latest tranlsation and uorb graphs * update vitepress to latest --------- Signed-off-by: Ramon Roche <mrpollo@gmail.com> Co-authored-by: Ramon Roche <mrpollo@gmail.com>
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Telemetry Radios/Modems
Telemetry Radios can (optionally) be used to provide a wireless MAVLink connection between a ground control station like QGroundControl and a vehicle running PX4. This makes it possible to tune parameters while a vehicle is in flight, inspect telemetry in real-time, change a mission on the fly, etc.
PX4 supports a number of types of telemetry radios:
- SiK Radio based firmware (more generally, any radio with a UART interface should work).
- RFD900 Telemetry Radio
- HolyBro SiK Telemetry Radio
HKPilot Telemetry Radio(Discontinued)3DR Telemetry Radio(Discontinued)
- Telemetry Wifi
- Microhard Serial Telemetry Radio
- CUAV Serial Telemetry Radio
- XBee Serial Telemetry Radio
- HolyBro XBP9X Telemetry Radio (Discontinued)
PX4 is protocol compatible with SiK Radio and will generally work out of the box (though you may need to change/use an appropriate connector).
WiFi telemetry typically has shorter range, higher data rates, and makes it easier to support FPV/video feeds. One benefit of WiFi radios is that you only need to purchase a single radio unit for your vehicle (assuming the ground station already has WiFi).
::: info PX4 does not support connecting an LTE USB module to the flight controller (and sending MAVLink traffic via the Internet). You can however connect an LTE module to a companion computer and use it to route MAVLink traffic from the flight controller. For more information see: Companion Computer Peripherals > Data Telephony. :::
Allowed Frequency Bands
Radio bands allowed for use with drones differ between continents, regions, countries, and even states. You should select a telemetry radio that uses a frequency range that is allowed in the areas where you plan on using the drone.
Low power SiK radios, such as the Holybro Telemetry Radio, are often available in 915 MHz and 433 MHz variants. While you should check applicable laws in your country/state, broadly speaking 915 MHz can be used in the US, while 433 MHz can be used in EU, Africa, Oceania, and most of Asia.