Just small 2cents.

For 2.4Ghz ELRS TXCO is crucial. Avoid JHEMCU receivers. TX is either built into radio or module. 1W is overkill..and unnecessary.

I personally advise DIVERSITY RX. 2 antenna. Prevent antenna null issues.. where after a flip or roll and quad is at weird angle and you almost failsafe.

Ive beem using BetaFPV SuperD 915Mhz a month and all good so far.

I didn't know that and I already bought them. The Radiomaster receivers that came with the module appear to be TCXO according to the web page but there is no mention of TCXO in the description of the Happymodel ELRS EP1 Nano Receiver. Pity.

Anyone got any ideas about the switch issue I'm having in post #15? I edited the model yml file in the SD card. I can make changes there so I know that model is being read, but even with changing switchWarningState: AdBuCuDd I still don't get the A and D switches in the menu on the radio. I'm pulling my hair out with this one.

(23-Sep-2023, 12:04 AM)Mike C Wrote: I have stumbled on yet another question though. I want to set up the switch warnings for the two 2-position switches and the three 3-position switches. My problem is that I can only set warnings for the two 3-position switches and the momentary switch (B, C and E):

https://i.imgur.com/t6RXQ0E.jpg

I can toggle the warnings on those switches however I want but I can't figure out how to add switches to that list. I'd like to have A,B,C and D listed instead of B,C and E. Anyone here know how to do that? I did some searching and found this video but the setup on my Pocket looks nothing like that, I don't have those same options.

(23-Sep-2023, 08:17 AM)Mike C Wrote: Anyone got any ideas about the switch issue I'm having in post #15? I edited the model yml file in the SD card. I can make changes there so I know that model is being read, but even with changing switchWarningState: AdBuCuDd I still don't get the A and D switches in the menu on the radio. I'm pulling my hair out with this one.

The switches that appear against the Switch Warning setting are determined by the type of switches they are configured as. Go to the HARDWARE menu and scroll down to the "Switches" section and check what type the self-latching A and D switches are configured as.

On my FrSky X9D+ transmitter I only have 2 and 3 position switches (not any self-latching switches) and the only selectable options for them are "2POS", "3POS", or "Toggle". Only switches that are configured as "2POS" or "3POS" switches are shown against the Switch Warning setting. If set to "Toggle" they aren't.

On the RadioMaster Pocket I'm not sure if the self-latching switches are configured with a different setting other then "2POS". It would be interesting to know what that is, and if it is possible to set it to "2POS" instead (which should equate to the same) so they then appear against the Switch Warning setting.

EDIT: Looking at the hardware setup for the RadioMaster Boxer which also makes use of a self-latching switch, that switch is configured as a 2-position switch in the hardware settings, so I would expect the RadioMaster Pocket to be configured in the same way. However, it is important to note that there isn't currently any publicly available EdgeTX firmware available for the RadioMaster Pocket for the latest 2.9.0 release version. You can only get nightly builds so it appears to still be work-in-progress and my guess is that RadioMaster just shipped the Pocket with an early version of the nightly build which might have some bugs in it related to your particular issue. So it might be worth upgrading to the latest nightly build so see if that fixes the issue. You can install that via EdgeTX Buddy HERE.

TCXO is not essential. The onboard crystal oscillator does drift with temperature change, on some of the RXs this drifted out of tolerance and prevented them from binding with the TX. Notably JHEMCU, Flywoo as well, and some others, but have not heard any issues with the Happymodel or Betafpv.

If you fly in extreme temperatures then you would benefit from TCXO, Happymodel has them and they are specifically labelled TCXO and costs a few dollars more depending on where you buy them. Otherwsie like Betafpv super D it is mentioned in the specs, but their lower cost lite/nano rxs don't have it.

I can attest that even in peak winter or summer temps, I've had no issue holding a good signal together without TCXO.

(23-Sep-2023, 08:35 PM)Suros Wrote: I can attest that even in peak winter or summer temps, I've had no issue holding a good signal together without TCXO.

Same. Most of mine are not tcxo.
It’s been a while and my memory is a bit spotty, but if I recall correctly the rx’s that drifted to the point of signal loss were due to a flawed design, and you could fix it by just removing a loading cap that shouldn’t have been there.

Unless you’re doing long range, I don’t think diversity is necessary either. These things have a pretty rock solid connection.

I would definitely avoid any receivers from manufacturers that couldn’t be bothered to work with the ELRS devs, like JHEMCU though. It’s not that they don’t work, but I’ve had issues with rx’s that aren’t officially supported that I didn’t run into with any of the officially supported ones- primarily in flashing.

(23-Sep-2023, 11:00 AM)SnowLeopardFPV Wrote: On the RadioMaster Pocket I'm not sure if the self-latching switches are configured with a different setting other then "2POS". It would be interesting to know what that is, and if it is possible to set it to "2POS" instead (which should equate to the same) so they then appear against the Switch Warning setting.

That was it! I set them to "2POS" and now there are on the menu. Many thanks for this one!

About the TCXO, I have stuck one of the TCXO Radiomaster on my mid/long range quad and the other will go on the Tunnel Rat. The other two are just playing around freestyle quads, they can get the Happymodel ones. Thanks for the info about this all.

(24-Sep-2023, 08:14 PM)Mike C Wrote: That was it! I set them to "2POS" and now there are on the menu. Many thanks for this one!

Out of interest, what type of switch values had they been set to if they weren't set as "2POS" switches?

(24-Sep-2023, 08:23 PM)SnowLeopardFPV Wrote: Out of interest, what type of switch values had they been set to if they weren't set as "2POS" switches?

"Toggle". I'd call that incorrect configuration from factory. The momentary switch was set to "2POS" which was why E showed up on the list. This was default from factory, nothing I had changed myself. I loaded the backup of the SD I took before I started with this.

(24-Sep-2023, 09:50 PM)Mike C Wrote: "Toggle". I'd call that incorrect configuration from factory. The momentary switch was set to "2POS" which was why E showed up on the list. This was default from factory, nothing I had changed myself. I loaded the backup of the SD I took before I started with this.

Yep, that's definitely a fault with the factory supplied configuration. It would be interesting to see if that has now been fixed in the latest nightly EdgeTX build, but the only way to prove that would be to trash the RADIO and MODELS folders on the SD Card so that EdgeTX is forced to recreate them with default configuration settings, so maybe not worth the bother if you now have it working unless of course you want to be helpful by raising it as an issue (if it still is) in the EdgeTX GitHub repo.

I might give that a go but first I just want to be in the air with ELRS on a few of my quads.

I do think it's worth me sending an email to Radiomaster though, they are delivering radios that currently will not give a switch warning if the arm switch is on a 2-pos switch and active during a power up. I don't know if Betaflight goes directly into arm if the button is active when it powers up. If it does it could get nasty.

(24-Sep-2023, 11:40 PM)Mike C Wrote: I don't know if Betaflight goes directly into arm if the button is active when it powers up. If it does it could get nasty.

No, Betaflight won't arm a powered up quad if the FC detects no receiver connection with the transmitter and then subsequently detects a established connection with the Arm Mode channel in the activated position. In that scenario the quad just beeps at you without arming the motors. Only the action of moving the Arm Mode channel switch to the disarm position and then back to the arm position will then arm the quad. So in reality you don't actually need a switch position warning for the arm switch if using it with UAV that utilises and FC running Betaflight (and probably some of the other flight control firmware like INAV and Ardupilot). So having the audible switch position warning is just a nice-to-have.

(25-Sep-2023, 10:42 AM)SnowLeopardFPV Wrote: No, Betaflight won't arm a powered up quad if the FC detects no receiver connection with the transmitter and then subsequently detects a established connection with the Arm Mode channel in the activated position. In that scenario the quad just beeps at you without arming the motors. Only the action of moving the Arm Mode channel switch to the disarm position and then back to the arm position will then arm the quad. So in reality you don't actually need a switch position warning for the arm switch if using it with UAV that utilises and FC running Betaflight (and probably some of the other flight control firmware like INAV and Ardupilot). So having the audible switch position warning is just a nice-to-have.

Good to know, thanks!