yes, thank you! That is very helpful
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@stretch1100 that pdf shows this for the MCU in the Jumper:
that doesnât match the 256k from the comment you found. It does match the STM32F405 (which has 128k base ram and 64k CCM, so total 192k)
I still suspect there is something odd about the CCM memory though, but it would be great to get a detailed reference manual. I wonder if CKS even make proper reference manuals?
I also just tested with it set to 256k ram at 0x20000000 and it doesnât work.
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@Bastelfuzzi did you find the correct target to update the firmware?
Want to formulate an email and we can translate and send to them to ask specifically what you need to know for the chip? Looks like their email address is wangb@cksmcu.com.cn
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So the wiring diagram in the aliexpress page is erroneous too.
The crossfire link is Gnd - VCC - RX - TX there. The same as in the receiver, so the RX goes to RX and TX to TX.
They must be crossed and as it seems to work for you I assume the wiring diagram is wrong.
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The labels on the receiver are âFC TXâ and âFC RXâ to indicate which flight controller pins they connect. As I mentioned, the image was taken from the ELRS Receiver Wiring page. I debated changing the labels to indicate the function on the receiver but I thought the âFCâ prefix used by the ELRS page was OK. I copied the same labelling for my photo.
My main concern was the red ground wire on the Jumper hardware. I didnât want anyone to blow up their alternate receiver by assuming the red wire was power.
I believe the âFCâ prefix makes the wiring diagram correct.
âFC Txâ is the receiverâs RX pin and âFC Rxâ is the receiverâs TX pin.
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Hello everyone
I just got mine and, after reading this thread, Iâm still unsure if I should add a compass.
Anyway, I did replace the GPS with a BN280 with a compass but couldnât enable it. Is there anything else I should do beyond wiring SLC/SDA and enabling the USE_COMPASS parameter? I did that but it wasnât detected.
Also, should I keep the original firmware or upgrade it?
Thanks in advance.
Thanks for the awesome explanation because I have one of these and you are 
% correct about flying in any winds over 5-10mph the Transition from qhover to fwba is really difficult to gain stable control and I have been trying to figure what is causing this and was considering on adding the Mq-5883 dual Gps/mag to see if it helps but you are saying it doesnât so I guess changing out FC is best option? Thanks for the explanation!
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If anyone wants the Xiake model icon ,its now available on SkyRaccoon:
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Hi @tridge
How did you manage to get the compass to work? I replaced the GPS with a BN280 which has a compass, hooked to the I2C but the compass wasnât detected. Do I have to upgrade the firmware? I tried yourâs but it fails to get the parameters.
Thanks in advance
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Not, with a servotester, but I switched several times up and down - unobtrusive.
I recommend a simple servo tester. The servos on my three Xiakes were all fineâŠ
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Since it is a CKS32F405, I will not update it , but rather replace the FC to avoid a crash.
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Thank you⊠may do the same.
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Would a genuine STM32F405 be a drop in replacement for the current chip? Depending on how adventurous I feel, I may try to swap the chip. Am I correct in assuming the pinouts would be compatible?
Thanks for all the great information.
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Hallo i am new. I got receive the xiake 800. I have not tested yet, but is it normal if the plane in stab. hover mode that the two motors at the front not equel vertical? You see the left motor is little bit more forward than the right motor. grtz Peter
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Some LOS flight testing today.Think I`ll try manual mode instead of cruise.
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The link has sadly expired. Anyone still has the file of the canopy?
Is this the canopy you are looking for?
There are updated versions and a mount for Matek F765 (partly pla & tpu). I will upload tomorrow the filesâŠ
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