Sorry Rainer for mixing your name
Yes, I was also looking at audio based telemetry. Although I still think teletext is better as some might use audio link just for audio
What regards to RC link. I use an RC link that is called eLeReS and is developed here in Poland.
Originally it was build basing on OpenLRS project but it ended up with totally re-written firmware.
Still the modules are compatible with OpenLRS. This system operates at 435,000 MHz (100mW)
Here are some key features:
- Same modules are used as TX, RX or Tracking Antenna - each can be programed to whether you want
- RX can either output 9 PWM signals or 1 PPM signal or S-BUS
- Telemetry - both modules have RS232 so you can send data from RX back to TX (currently guys are working on an up-link)
- Both RX and TX can measure BAT Level. If connected to RX than on ground you receive BAT voltage level for which you can set alarms.
- RX outputs RSSI level + via telemetry link you receive a copy of that to your TX - you can set audio warnings in case you are flying out of range.
- locator - in case you loose your plane you can turn on a locator. RX after signal lost goes to a locator after set time. Your TX is used to find your plane - you have audio signals that increase the closer you are to your plane.
- There is an option to attach an LCD that displays your plane parameters (RSSI, BAT Level, if GPS connected than GPS position)
- option to bind more than one RX to one TX
- other fancy features.
Generally this solution is available from this year. The guys are working on publishing this info on RCG.
Currently the modules can be bought here:
http://cyberdrones.com/shop/product.php?id_product=17Tracking Antenna is something that is available from the past 2 months. People are testing this solution.
To be honest for that you don't need any gyroscopes or ACC. You just need one eLeReS module that receives data from the plane and positions the antenna accordingly.
Calibration of such setup is required only once - to define servo movement range.
Before power on you just need to orient the antenna north, power on your plane and antenna and once fix is found this position is saved as home. From now all tracking antenna calculations are done by eLeReS module based on sent GPS data from RX.