WLToys Q303

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17 Dec 2016 10:08 #56911 by ajtank
Replied by ajtank on topic WLToys Q303
I retest with my 3 children's birth dates as ID and it binds successfully. All channels are found to work too. I scan with my RF Explorer and see the channels hop between 2470 - 2478 Mhz depending on the ID. Let's see if Seby got the same results with his 7e.
I have raised some questions here and have not yet received any response. According to the RF Explorer reading, the transmit power has only 4 levels instead of 8 in the deviation menu. I cannot measure the absolute value but can only list the effective settings:
Power level 1: 150mW = 100mW
Power level 2: 30mW
Power level 3: 10mW = 3mW
Power level 4: 1mW = 0.3mW = 0.1mW

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17 Dec 2016 10:17 - 17 Dec 2016 10:18 #56912 by vlad_vy
Replied by vlad_vy on topic WLToys Q303
You can look for power settings at 'spi' folder:
github.com/DeviationTX/deviation/tree/master/src/protocol/spi
Last edit: 17 Dec 2016 10:18 by vlad_vy.

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17 Dec 2016 10:20 #56913 by goebish
Replied by goebish on topic WLToys Q303
The nrf24l01 has only 4 output power, basically it can output -18, -12, -6 or 0 dBm (0dBm = 1mW) but the extra PA does add ~+20 dBm (for the RFX2401C, not sure which PA/LNA the 4-in-1 is using).

Have a look at the nrf24l01.c source file (src/protocol/spi), 100uW, 300uW and 1mW are using the same power settings, same for 3mW & 10mW and 100mW & 150mW.

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17 Dec 2016 10:25 #56914 by ajtank
Replied by ajtank on topic WLToys Q303
vlad-vy and goebish

Thanks for showing a newbie where to look for the answers. Could the transmit power menu be adapted to different protocol / transceivers?

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17 Dec 2016 10:26 #56915 by goebish
Replied by goebish on topic WLToys Q303

ajtank wrote: it binds successfully. All channels are found to work too.


Ok, made a pull request :)
github.com/DeviationTX/deviation/pull/78

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17 Dec 2016 12:07 - 17 Dec 2016 12:16 #56917 by goebish
Replied by goebish on topic WLToys Q303

ajtank wrote: Could the transmit power menu be adapted to different protocol / transceivers?


It could be done, but that would add complexity and size to the code (which is a no no for the 7e) and one would have to set which PA is used for each installed RF chip.
Maybe it should only be notified in the user manual and wiki.
^^ I leave this task to someone that has a better english than me ;)
Last edit: 17 Dec 2016 12:16 by goebish.

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29 Jul 2022 11:08 #78030 by Bangdc
Replied by Bangdc on topic WLToys Q303

goebish wrote: We know for sure they are fake nrf24l01 because auto acknowledge doesn't work, see this comment on hackaday:
hackaday.com/2015/02/23/nordic-nrf24l01-...ake/#comment-2474764

nrf24l01 protocols using 250 kbps bitrate:
ASSAN
BlueFly
CFlie
FQ777
HiSky (3ch ground protocol only)
FY326
iNAV
ne260
MJXq (E010)
mt99xx (i6S)
KN (optional)
SLT
SymaX (X5)
V202 (optional)

That doesn't mean that neither of those protocols will work with a 4-in-1, looks like bitrate is not the only factor ...

So you mean any fake Nrf24L01+ chip will not able to use Auto Ack?

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