IntroductionHoTT telemetry was introduced by Graupner into his RC radio and allow connecting various sensors to the receiver. A Revolution, Revonano or Sparky board can emulate this modules and send telemetry data to the radio. The following modules can be enabled: - Vario
- GPS
- EAM (Electric Air Module)
- GAM (General Air Module)
- ESC
WiringHoTT receiver can be connected to the Mainport or FlexiPort and FlexiIO (receiver port) on Revolution board. ![](https://librepilot.atlassian.net/wiki/download/thumbnails/1323073537/Revo-HoTT_telemetry_wiring.png?version=1&modificationDate=1555275764241&cacheVersion=1&api=v2&height=250)
With a reduced size a Mini Revolution board can be used as well, taking in account the receiver port has 8 pins instead of 10 pins in original Revolution board. Image Added
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