A beginners adventure into the world of multirotor fpv drone racing and freestyle

FrSky X-Lite Mode 2 Throttle Headaches

Problem: Long screw given to switch to Mode 2 throttle for FrSky X-Lite is finicky or does not work (strips, doesn’t connect, etc). X-Lite is stuck in Mode 1 with throttle returning to midpoint with spring still engaged.

Explanation: The FrSky X-Lite can be converted from Mode 1 to Mode 2 ‘easily’ by inserting the given longer screw into the back of the transmitter. The screw fits down inside directly on to a small metal rail/plate that releases the spring tension. However, there is no insert to guide the screw. It can be frustrating to find the right position for the screw (if you are not familiar with the design) and it can easily be screwed in off-center, improperly or too much and cause it to fail temporarily or permanently. Additionally, through use the screw can come off of the plate returning it to Mode 1 on it’s own.

Solution:

I had a lot of trouble with the screw and ended up having to open up the X-lite to try to convert it to Mode 2 without using the screw. It was a relief to find out that it was not hard at all (was a bit nervous as the thing was brand new) ! I followed the video down below:

  • Remove caps and batteries
  • Used a guitar pick and a small flat head screw driver to carefully pry open the clips from the battery ‘grips’ and around to the top as shown in the video.
  • Used fine tweezers to gently remove the spring
  • Put controller back together!

I recommend removing the spring regardless for this model of the X-lite (v2) as the current options seem prone to failure. Hopefully in subsequent models they will provide a more robust way to convert to Mode 2.

Betaflight RSSI flashing zero in OSD

Problem: RSSI flashing 0 (incorrect) or extremely low in Betaflight.

Details:

Bf:  Betaflight 4.0.0, 4.0.4
rx:  Frsky R-XSR
tx:  Frsky x-lite
vtx: 
vrx
fc:  RDQ Bardwell F4 V2

Solution:

  • Configuration menu
  • RSSI (signal strength) 
  • Toggle RSSI_ADC
  • CLI
  • type: set rssi_invert = on
  • type: save

Explanation: RSSI_ADC needs to be checked. Once checked OSD will display a inverted value (ie 97 will read as 3) by default until the parameter to invert is changed via CLI.

Sources:

https://www.getfpv.com/learn/fpv-essentials/frsky-rssi-configuration-betaflight-butterflight

https://github.com/betaflight/betaflight/blob/master/docs/Rssi.md