Radiomaster TX16S + RFD TXMod Sbus

@Allister, @Yasiinm

Gents, I can report that with your kind suggestions I have been able to get RC Control, Mavlink telemetry, and Yappu scripts working on my TX16S correctly. Your inputs are much appreciated.

@Allister, The start sequence you outlined is still needed. I was also getting Yaapu script issues until I used your recommended sequence and the issues went away. They were the same ones, incorrect flight modes, and some incorrect values.

I did have to update firmware on both the TXMod V2 and the RFD 900x radio, both to the latest versions, below is how TXMod reports it. By the way, I have not seen Telemetry Lost messages, there is a note in the latest TXMod version that they increased RSSI reporting frequency to address this, and for the past 30 minutes I’ve had it working; I have not got those messages so far.

Software Version: 1.4.6
Build date: Nov 30 2020 10:57:11
Internal modem version: RFD SiK 3.16 on RFD900X
Remote modem version: RFD SiK 3.20 on RFD900X

I decided to go with these versions, even though they are not the same internal and remote RFD900x versions because of the release notes, which I’ll post below for completeness.

I’m going to make a separate post with my full setup showing FC and all pieces, both for my own reference in the future and so it can help others. I’ll post back a link to that thread once I have it done.

Here is the link to the thread with my full setup, thanks again!

Thanks again!

TX MOD Firmware Notes

The current version of the TX MOD firmware is 1.4.4
This firmware will update the internal modem to V3.15 or V3.16 depending on selected SPIFFS file and will require the paired modem to be updated to the same version.

Version History

30/11/20 - 1.4.6 Addresses issues relating to telemetry loss warnings by increasing RSSI report frequency
01/09/20 - 1.4.5 Bugfix: clears cached radio parameters once First Run Wizard is executed
28/08/20 - 1.4.4 Bugfixes and code refactoring: RSSI figure is now reported without an active WiFi connection
06/08/20 - 1.4.2 Added feature that initiates datastreams, without GCS connected to the WiFi, and some minor enhancements.
18/06/20 - 1.4.1 Bugfix: S.PORT also working while connected via TCP
25/05/20 - 1.4.0 Added MavLink to S.PORT support. The user is required to modify the hardware to get the feature working.
12/05/20 - 1.3.12 Bugfix: TXMOD no longer resets modems during bootup

And for the 900x:
RFD X V3.X series modems SiK firmware version release log

Version

  • 3.20

New

  • added analog read command atpr?=x
  • added Fsframeloss param to set frame timeout manually

Improved

  • turn sbus output off until first data
  • changed sbus rx delay for restart to 2.6mS and force clear of rx buffer before every SBUS rx DMA start
  • changed india max rate to 188 instead of 200 for compliance reasons

Fixed

  • fixed SBUS2 extra data
  • fixed SBUS ati11 command
  • fixed fix bug with jerky servo for Futaba SBUS
  • fix bug with large packets for ppm and aux serial
  • fixed bug with 868,842 and 933 setting max air rate when ati5? command issued
  • Fixed problem with Futaba ppm on 12 channels, PPm width goes down to 500uS on futaba instead of 1mS, extended range to allow these values through

Notes
The recommended firmware version.

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