SP548E LED SPI IoT Controller with Beken BK7238 - Discovery Trail

Question

Hi. I've just taken delivery of ANOTHER LED/SPI IoT controller. This is the SP548E from Ali Express https://fr.aliexpress.com/item/1005007039123431.html

Not knowing what it would come with, I was surprised to see it has a Beken BK7238, my first, at its core.

I'll post as I discover more.

divadiow · Accepted Answer

Giving this another look now that BK7238 and SPI is supported.

SP548E SPI RGB LED controller with label and cable connector

White LED controller with three buttons labeled M, power, and S

P28 S button
P22 M button
P21 Power button
P0 PCB blue led (D5)
P1 PCB green led (D4)
P16 MOSI/SPI

P9 IR pad (no IR on my device) is connected. 100ohm resistor in path (R22).

Close-up of a PCB with IR+, IR-, W, C labels and several resistors, capacitors, and LEDs.

Didn't have to overwrite bootloader on this device for OTA to work as original is already set for 0x132000

Log in, to see the code

is my autoexec.bat. WS2811 strip behaves a little odd - speed and colour doesn't match how it behaves on BK7231N/CBU. No switching of RGB/BRG etc corrects it. Pure green/red/blue are not correct prime colours. Power on/off is either ineffective or pauses colours instead of turning off.

WS2812B behaves as expected.

divadiow · Answer

reminded me of this Added after 2 [hours] 8 [minutes]: RT-Threads bootloader Code: TextLog in, to see the code Easy UART Flasher successfully reads the coeff key in BK-N mode but fails to backup firmware. Code: TextLog in, to see the code BK-T mode reads the flash but fails CRC at the end, so no file saved. Attempt with BKFIL bk_loader.exe was successful Code: TextLog in, to see the code dump attached. log out and flash download was both on 1RX/1TX

divadiow · Answer

The QR code in the manual links you to some weird non-store APK download from https://download.ledhue.com/page/scenex/

www.ledhue.com just redirects to https://github.com/Spled/spled.github.io

The app is called BanlanX and is also available in the Play Store https://play.google.com/store/apps/details?id=com.spled.scenex&hl=en_GB

Added after 43 [minutes]:

OTA is 0x132000 and if you flash OBK rbl:

Log in, to see the code

doesn't boot of course

p.kaczmarek2 · Answer

Nice finding, have you tried to check Skip key check in Advanced so this operation can continue: Code: text Expand Select all Copy to clipboard ^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^ WARNING! Non-standard encryption key! Please report to forum  Or just try using BK7231M mode  ^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^ There was no result to save.

divadiow · Answer

I'm sure I covered all the bases by trying all options but will do it again

divadiow · Answer

argh. clouded by the excitement I guess. yes, it dumps with skip key check in N and M mode. that's embarrassing. I know the skip check is there

Added after 56 [minutes]:

and from a totally erased flash, not even bootloader, you can restore backup using Easy Flasher too

boots again

so I guess you could say EF supports BK7238. Maybe just needs a new select chip type menu option so saved backups have the right filename? any other tests I should perform?

p.kaczmarek2 · Answer

So basically, I need to copy BK7231N path, rename to BK7238, and change key?

divadiow · Answer

it seems so. change it so it ignores key check automatically with BK7238 mode or that it finds 94017a00 94017a00 94017a00 94017a00 as an acceptable key and to carry on regardless? I wonder what other keys are in use on BK7238 devices. Do Tuya use their BK-N key on their BK7238 devices?

SP548E LED SPI IoT Controller with Beken BK7238 - Discovery Trail

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