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document Hott telem support #2453

Closed tridge closed 4 years ago

tridge commented 4 years ago

we need to document the new Hott telem support. Ralf Helbing will provide some images for it I'll do a discuss post with basic info. Setup is pretty simple, just SERIALn_PROTOCOL=27 and SERIALn_OPTIONS=4

Ralfde commented 4 years ago

Baudrate 19200 baud Connect Graupner Telemetry connector of the receiver with an UART_TX. Best is to use an UART without RTS, CTS. Here some screenshots of the mz-16/mz-32 Screenshots.zip

Ralfde commented 4 years ago

Supported sensors protocolls from ardupilot are the sensors: GPS, EAM and Vario. So additional an ESC and/or GAM telemetry sensor could be connected.

Hwurzburg commented 4 years ago

A phot of the system would be good...maybe OmnibusF4 connected to RX sitting next to TX

Ralfde commented 4 years ago

Omnibusf4v6_mit_HoTT_Telemetry The foto does show an Omnibusf4v6. SUMD or SBUS is connected to the LED connector at this fc. Telemetry is connected to TX3 in the foto. Laser rangefinder at RX4. GPS at TX6, RX6 and I2C

Hwurzburg commented 4 years ago

Supported sensors protocolls from ardupilot are the sensors: GPS, EAM and Vario. So additional an ESC and/or GAM telemetry sensor could be connected.

sorry, I am afraid I am not familiar with those sensors in Ardupilot ...you will have to be more specific....as far as I know, AP has no support for an external VARIO or Graupners EAM or GAM modules ....exactly how would such a sensor be connected? to the FC? to the HOTT telem signal line? I assume its a polled half duplex arrangement like FRSKY... it would be nice to state what exactly what data is sent by the HOTT protocol from the autopilot and can be displayed on the TX

I have started work on a page, but need this info to complete it

Ralfde commented 4 years ago

Yes, SERIALn_OPTION=4 is halfdublex. The GPS is the external sensor. The telemetry data of the GPS are send via HoTT telemetry to the HoTT transmitter and can be displayed there or optional in a smartphone app like the HoTT Viewer 2. The barometer altitude datas are also send in the Vario protocoll together with the flight mode, disarmed, armed mode and Preflight check success, failed. The battery datas like voltage, current and capacity is send as EAM data to the radio, if such a sensor is included in the flight control or connected externally to the fc. I think the screen shots do show most of the datas, which are supplied.

Hwurzburg commented 4 years ago

okay...what you said implied that other sensors besides the normal ones in Ardupilot could be added....what you meant was that their data was formatted as HOTT sensors and transmitted...okay, so nothing needs be added to the PR I am about to push....thanks

Hwurzburg commented 4 years ago

2461 awaiting review

Ralfde commented 4 years ago

Yes, SERIALn_OPTION=4 is halfdublex. The GPS is the external sensor. The telemetry data of the GPS are send via HoTT telemetry to the HoTT transmitter and can be displayed there or optional in a smartphone app like the HoTT Viewer 2. The barometer altitude datas are also send in the Vario protocoll together with the flight mode, disarmed, armed mode and Preflight check success, failed. The battery datas like voltage, current and capacity is send as EAM data to the radio, if such a sensor is included in the flight control or connected externally to the fc. I think the screen shots do show most of the datas, which are supplied.

Ralfde commented 4 years ago

Correct. The HoTT Sensor bus allow to connect different sensors parallel.