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« on: November 30, 2018, 12:17:31 PM »
manjulal
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City: Trivandrum
State: Kerala
RC Skills: Beginner
Posts: 66
Join Date: Nov, 2017




Hello everyone,

I am building a large hexacopter (680mm+) with DJI Naza M V2 FC, DJI iOSD Mini, FrSky X8R Receiver, 600mW vTx and a Taranis Q X7 Transmitter. I have also installed a Retractable Landing gear to the frame. I am using the D16 mode on the receiver with an S-BUS connection. Can someone guide me how I should setup the retracts?

I managed to operate the landing gear up and down using a spare 3 position switch on my transmitter. (Setup on Channel 10) But I am wondering how to connect that to failsafe. My requirements are:

If the FC enters  failsafe mode (by either switching off the transmitter, engaging failsafe switch or transmitter loses range) retracts should be deployed.
When the hexa reaches 2 meters altitude, retract should go up and below 2 meters it should come down.
The 3-position switch I am using should be set as "Gear Up", "Gear Down" and "Auto". Can we do this and how?
Can I set this all up using logical switches? Please explain how. Is there any way we can read the GPS altitude info on OpenTx?

I apologize for asking too many questions in one post.  Smiley But would appreciate if anyone can guide me or give some pointers.
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« Reply #1 on: December 17, 2018, 05:36:50 PM »
manjulal
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City: Trivandrum
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Posts: 66
Join Date: Nov, 2017



Since no one was able to reply to this, I did the following:

1. Ordered an FrSky GPS Sensor (https://www.frsky-rc.com/product/gps-2/)
2. Connected the GPS Sensor to my X8R using smartport.
3. From my Taranis transmitter, I was able to fetch the GPS sensor altitude value using telemetry.
4. Created a logical switch and set that up with the retracts physical switch. Now I can trigger the retracts with custom altitude parameters.

I am yet to figure out how to connect the retracts with failsafe though.
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