thUndeadMod v3.4 - openLRS S**T just got real :)

[zitron]

As you can see, which I couldnt at the time, right next to me the RSSI in the top right shows full to 0 full to 0

Isn't that excatly the the problem you were having earlier but for 459?

When that is happening are you getting any packet loss or CRC fails associated with the RSSI weirdness? It didn't seem to stop you from throttling up... The RF22 has a interrupt for packets that fails CRC, I wonder if that is implimented in ORLS. If you are losing packet while standing right next to the plane that should give you a warning something is wrong.

[zitron]

just installed the v2 hardware today, using a turnigy 9x for my tx. got 1km range before failsafe kicked in. This was by me leaving the TX switched on and left on a bench in my garden. I'd configured failsafe to move a servo. took the rx and servo for a drive and managed to get to 1km with houses, trees, walls and a big hill between the TX and the RX, while it was in my car.

You got 1km range in your car through a hill?? I was only able to barely get to 800m at 459 standing in field after going through a few houses. I did find that that the altitude of the RX makes a huge difference.

[Coyote]

Only if your launching via FPV, I couldnt see the screen on the launch so had no idea the RSSI was doing that, while it was sat on the floor before launch I didnt notice it doing that at all.

On my first fight the RSSI held on take off, but then randomly dropped out at 400m to nothing

[Devonian]

Hmmm, I've just hooked up my little LCD RSSI meter to my V1 Rx and I'm getting the same fluctuating 100% - 0% - 100% - 0%.... reading on Mihai's latest code (459MHz).

I also note the green LED is very 'dim' or maybe pulsing on/off very fast?

Something is amiss somewhere - I never got any of that on Flytron's firmware(s).

Nigel.

[Splashy]

If we are running on 435 Mhz is there much to be gained from using the Thundead code?

Does the standard Flytron firmware not give good range out of the box?

[wgt40w]

Gentlemen,

I have been following this Thread with great interest. It's like a cross between a good detective story and a soap opera.

I honestly admire all of your sheer dogged determination to see this project through.

A question from the ignorant:-

Does the firmware resetting the EZUHF system from 433 to 459 mhz work OK??

If so, would it be possible to compare the code for the EZUHF to the openLRS to possibly identify an area in the openLRS that needs modification ?

[Coyote]

Not really no, they are completely different systems and programming, the OpenLRS is Arduino based. But I really would like to know what chips used in the EZUHF that Sander believes works fine on 459Mhz as well as 433

[zitron]

Hmmm, I've just hooked up my little LCD RSSI meter to my V1 Rx and I'm getting the same fluctuating 100% - 0% - 100% - 0%.... reading on Mihai's latest code (459MHz).

I also note the green LED is very 'dim' or maybe pulsing on/off very fast?

Something is amiss somewhere - I never got any of that on Flytron's firmware(s).

Nigel.

Ok there are two ways to read RSSI from the RF22, one that reports RSSI whenever your want, which is used in spectrum scanning, and another way which reports the RSSI while the last packet was being received. The second method is the preferred way for measuring reading RSSI for a LRS. So if the signal is so low that you don't receive anything for a while the RSSI function should still report the RSSI of the last packet.

Either way, the RSSI value from the RF22 will never be exactly 0, unless it is forced to be 0 in the arduino code.

[Devonian]

I use this meter
http://www.dpcav.com/xcart/RSSI-Meter-Kit-Assembled.html

To calibrate it, you
set the Low point with the Tx off (no RSSI signal)
set the High point with the Tx on full power nearby (max RSSI).

I connected it to the RSSI out on my v1 Rx, as above, using Mihai's firmware.

I guess I should check with a multimeter as well to confirm it really is fluctuating or not.

Nigel.

[Coyote]

I swapped my rx over because I was thinking thats the problem, new rx shows 3.2v RSSI. My old one had for a while now only ever shown 2.8v RSSI.

This has me thinking, the wing is fine with its rx, the rx from my quad seems absolutely fine, only walker rx is showing 2.8v rssi and suspected as fault

Now, guess which is the only rx that has ever been flashed with 459 ?

Could be linked, I dunno

[zitron]

I swapped my rx over because I was thinking thats the problem, new rx shows 3.2v RSSI. My old one had for a while now only ever shown 2.8v RSSI.

This has me thinking, the wing is fine with its rx, the rx from my quad seems absolutely fine, only walker rx is showing 2.8v rssi and suspected as fault

Now, guess which is the only rx that has ever been flashed with 459 ?

I really don't think changing the firmware could cause damage to the board... Unless somehow the rx was transmitting at full power without an antenna!

[Coyote]

Maybe its took a hit at some point, I dont know yet, but it has been showing a lower RSSI for no reason.

[thundead]

first off, anyone still using my code on 459mhz should switch to 435 until I figure out if the power dropout is software or hardware related.

Second off, everyone having RSSI problems please complete this and post it on the forum:

FW version:
RSSI Pin used:
Hardware version used:
Band used:
OSD Used:
RSSI Buffer: Yes / No / Kind (lpf , opamp, resistor)
RX covered ?: Yes - heatshrinked and rf module protected/ No, bare PCB mounted in craft

Cheers,

Mihai.

[Coyote]

FW version:3.5
RSSI Pin used:PIN 1
Hardware version used:v2
Band used:433 / 435

RSSI 2.8 TO 2.9 only

[papa_lazerous]

I think it might be helpful to also state it a buffer was used between the Rx and
OSD on the RSSI and what was powering the Rx ie separate UBEC or
ESC etc