Graupner HoTT Sensors

Fixed Wing ESC Sensor Driver

It is now possible to connect the Graupner Brushless Control T range of ESCs directly to the PX4 so that the autopilot can read the following live data directly from the ESC:

  • temperature
  • voltage
  • current
  • RPM

Currently this data is being read by the driver and written to an internal message but it is possible to log the data using sdlog2. If you are a Graupner HoTT user you can read the data directly on your radio if you use the hott_telemetry app (don't forget to activate General Air.Mod on your transmitter).

You do not have to have any other Graupner HoTT equipment to use this ESC. The PX4 is simulating a HoTT receiver.

What you will need

Wiring

The wiring is very straight forward. You simply need to connect the single wire coming out of the ESC to the TX pin of a UART (serial) port on the PX4.

If you use the PX4FMU with the PX4IO you can connect it to the TX pin on a free UART port such as USART2 (/dev/ttyS1) on the PX4IO using a Hirose DF13 5 pos (Digi-Key Link: DF13-5P-1.25DSA) connector. More information on the location of the port can be found in the PX4IO User Manual.

Manually Starting the Driver

To start the app manually from the NSH console type:

nsh> hott_sensors start

To check whether the app is running:

nsh> hott_sensors status

To stop, use:

nsh> hott_sensors stop

Options

–device / -d

The default UART is currently set to /dev/ttyS1 (USART2).

Example

Starting the driver using an alternative UART, such as UART5.

nsh> hott_sensors start -d /dev/ttyS2

Auto Starting the Driver

Add the following line to /etc/extras.txt on your microSD card:

hott_sensors start
Translations of this page:


Quick Links

QR Code: URL of current page