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

[Coyote]

Test 2 complete.

Thundead v3.5 433mhz 100mw output

You can relax Maihi is not your v3.5 code :)

>8.057km with an RSSI of 1.50

So looks like it is the 459 that's the problem, test 3 in s min v3.5 on 459 MHz

[Coyote]

Test 3

Thundead v3.5 459mhz 100mw output 433 antennas

I drove to the first check point at 2.4km. Got the plane out and had a connection for 1min max. RSSI 1.5 to 0. Glitches as soon as plane was banked, then after a failsafe, no rx connection could be made. I drove higher up, still no connection. Connection was re-established 400m from home

This was interesting though. If it had a link at 2.4km, all be it temporarily and with 1.50 that suggests its down on 433 but we know the chip running at 459 is a little down on power, coupled with the antennas being tuned for 433 this is to be expected. So the loss and inability to reconnect suggests to me the channel's used or the hopping ?

[Cat695]

Cracking test results Ian

Its like live updates lol all sat here with bated breath

[pk-surfing]

 :popcorn:
and puts kettle on...

PK

[Coyote]

I'm still out ( wacky warehouse with the kids ) but ill do a proper post when I get in with check points, RSSI values, A noise floor spectrum sweep from antenna location and video

[Cat695]

You mean YOU are playing at wacky warehouse!!

[Coyote]

Ok full report >>

Test was done at the same location as last time.

1) This was a ground to ground test
2) Tx antenna was a Diamond SRH771 SMA 433MHz
3) Tx antenna was fitted with a 700mhz low pass filter
4) Hopping was 5 channels
5) A GoPro was on and recording through the whole test
6) Gopro was 12" from the OpenLRS Rx
7) My OpenLRS antenna was not fitted as recommended directly to the Rx but on a 24" RG318 tail
8) 5.8ghz vtx was running the whole test with a linear antenna so to cause as much effect on results as possible. It shouldn't, but anything that was gong to be switched on while flying was.

First a noise floor reading was taken from the transmitters location :



Tx power was at 12.6v for the first test, running down to only 12.2v for the last test.

Weather was 11 degrees, overcast then showers followed

Test procedure :

Flash firmware
Set tx down at home location
Set home on plane after >6 sats were locked
Drive to checkpoints noting distance, RSSI and orientation behaviour

Test 1
Firmware used : Thundead V3.2
Frequency : 433 Mhz, 5 channel hopping, default header
Output power : 100mw
Booster : 0

Distance : 2.44km, 3.427km, 4.441km, 6.971km and 8.04km
RSSI : N/A

Test 2
Firmware used : Thundead V3.5
Frequency : 433 Mhz,5 channel hopping, default header, set 1
Output power : 100mw
Booster 0

Distance : 2.441km, 3.44km, 4.549km, 6.990km and 8.057km
RSSI :      1.29        1.79      1.70       1.57            1.50

Test 3

Firmware used : Thundead V3.5
Frequency : 459Mhz, 5 channel hopping, default header, set 1
Output power : 100mw
Booster : 0

Distance : 2.459km
RSSI :       1.50 ( briefly )

OpenLRS range test

[Cat695]

So basically 459 on these boards is....pants

[Coyote]

No, your not reading the results, at 2.4k it did connect, with an RSSI of 1.5v, so it is transmitting a fair distance, but somethings up, if that somethings figured out, then it may still be game on.

[papa_lazerous]

perhaps we need a no hop test as suggested before, perhaps it will yield better results.  I guess the only good thing is that we will have more range in the air than on the ground.

I'm hoping Thundead has some idead when he comes and visits the thread next....

[zitron]

Ok full report >>

First a noise floor reading was taken from the transmitters location :

Wow if I'm reading that right, you have a massive 10dB noise floor difference between 435 and 459! If that's actually true you can expect easily less than half the range at 459. I wonder if that is caused by the go pro. On top of that you are using 433 antenna... You should really try it without the go pro and use proper antennas to narrow down the possibilities.

I've also done some tests today, I will post them after dinner.

[Coyote]

Nope, gopro, plane, video system and tx off during the noise floor scan

[thundead]

Hooooly shiiit 8 km on 433. the fw is defo working right haha. that's a new record for the openlrs then. immagine how much distance that translates into the air. grat work Coyote! awesome range test!

[Coyote]

Thanks very much, yes firmware on 433 deffo works :) Pin change and RSSI work great too :)

[thundead]

awesome! damn you who ever made 459 the rc control freq lol

Thanks very much, yes firmware on 433 deffo works :) Pin change and RSSI work great too :)