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Author Topic: FrSky R9MM Receiver...Is it a long range receiver..? Firmware Fiasco.  (Read 1019 times)

English Turbines

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Re: FrSky R9MM Receiver...Is it a long range receiver..? Firmware Fiasco.
« Reply #15 on: January 26, 2019, 10:37:05 AM »

You can not use EU in adaptive mode as it wouldn't be EU anymore so you select the FCC option which ( last time at least ) is 868 not 915 which I confirmed with a scanner at home because I was dubious. I presume its the same with this version.

  Talk about misleading the Public...dont they realise that FCC is immediately associated with 900mhz..?...
  On my Taranis, that confusion didnt appear at all, it just offers, 10mw/100mw/500mw/ (up to)1 watt (Flex)[email protected] 868. The words EU and FCC dont appear.

« Last Edit: January 26, 2019, 05:23:32 PM by English Turbines »
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Coyote

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Re: FrSky R9MM Receiver...Is it a long range receiver..? Firmware Fiasco.
« Reply #16 on: January 26, 2019, 05:34:58 PM »

They may have changed it on the latest release, I have not downloaded it and looked yet. One of the dev forks did that ( No FCC just EU or set power levels ) so maybe ( I would  Have ) they adopted that approach for this new version.
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English Turbines

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Re: FrSky R9MM Receiver...Is it a long range receiver..? Firmware Fiasco.
« Reply #17 on: January 27, 2019, 12:34:56 PM »

I think its more to do with Open TX 2.2.3 and the different Transmitters myself....

 The types of transmitter Models are defined in Companion, and my guess is the different options offered are more to do with that than the TXModule Firmware itself.

                     :vulture:

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Alan Paul

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Re: FrSky R9MM Receiver...Is it a long range receiver..? Firmware Fiasco.
« Reply #18 on: March 08, 2019, 11:59:40 AM »

I have now bitten the bullet and done the upgrade to 2.2.3 on OpenTx and the new Flex firmware on the R9M module and R9 receivers.  All worked OK - no problems and ground range tests have been fine, but no actual flight tests yet due to gale force winds!!  System set to up to 1W and 868MHz.

I was testing my failsafes in my usual way by holding open throttle and controls full over and then switching the transmitter off expecting the plane to throttle back and centre the controls but nothing happened.  I realised I was powering the R9M module via an external 2S Lipo.  If I repeated the test but without using the R9M external power, the failsafe test worked fine and the throttle shut and controls centred.

My theory is that when I switched the Tx off with the R9M powered by an external supply, the R9M module continued to send a carrier signal to the receiver so although there was no control modulation, the receiver didn't see this as a signal loss so didn't enter failsafe.

I am assuming that in a real life situation the signal from the module would be lost and the receiver would go into failsafe, but I wondered if anyone had any ideas about this.  Do I need to do a full range test or would putting the Tx into low power range test mode suffice to check this out.  Or can I just assume that the failsafe would work OK?


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Coyote

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Re: FrSky R9MM Receiver...Is it a long range receiver..? Firmware Fiasco.
« Reply #19 on: March 08, 2019, 12:03:33 PM »

The failsafe is triggered by the receiver monitoring failsafe flags in the signal, once the control signal was lost ( not the rc signal to the R9 transmitter ) the receiver will then initiate its failsafe procedure.
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Alan Paul

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Re: FrSky R9MM Receiver...Is it a long range receiver..? Firmware Fiasco.
« Reply #20 on: March 08, 2019, 04:34:51 PM »

Thats great to know.  Actually went out flying and did some limited range testing today and all went well.  We also did a range test on the ground in reduced power mode and with a bit of antenna shielding got it to failsafe correctly and when unshielding the antenna it immediately went back to throttle open etc, so all looks good

No RSSI drop offs when flying and its great to have the telemetry with the up to 1W output settings.  Heres hoping that the 2.2.3 Open Tx plus the Flex firmware on 868MHz remains as good as it looks so far

Will do a proper range test when the weather improves - haha....
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English Turbines

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Re: FrSky R9MM Receiver...Is it a long range receiver..? Firmware Fiasco.
« Reply #21 on: March 08, 2019, 06:54:48 PM »

Thats great to know.  Actually went out flying and did some limited range testing today and all went well.  We also did a range test on the ground in reduced power mode and with a bit of antenna shielding got it to failsafe correctly and when unshielding the antenna it immediately went back to throttle open etc, so all looks good

No RSSI drop offs when flying and its great to have the telemetry with the up to 1W output settings.  Heres hoping that the 2.2.3 Open Tx plus the Flex firmware on 868MHz remains as good as it looks so far

Will do a proper range test when the weather improves - haha....

  I hope you get better range than I did...Using a True=Mox antenna, the best I could manage was around 2.5 kms with the tiny single dipole R9MM receiver, with the RSSI stable, but dropping into the 40s around 2.5kms....IE....Hopeless.
  This was on the current Flex Firmware with TX output limited to 500 mw....Which is an awful lot on 868 mhz.

 Be interested to see what you get out of your R9 receiver, it may well be better as it has dual antennas..? I've abandoned my R9MM for now. Not inclined to invest in a more expensive receiver as yet.

                                                                                               :vulture:


« Last Edit: March 08, 2019, 07:02:56 PM by English Turbines »
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