DX-Smart BK7238 DX-WF24A Module with DX-PJ16-V1.1 CH340 USB-TTL from Taobao/Superbuy

Forgot I'd added these to an order of bits from Superbuy/Taobao just to see what they were and came with on their flash. Here's some info should anyone be looking for detail about these and come across this post. Maybe useful.
https://item.taobao.com/item.htm?id=763512256407



http://en.szdx-smart.com/EN/cs2/117.html

DX-Smart BK7238 DX-WF24A modules on tiny break-out boards. This particular bundle includes short USB-C cable and the DX-PJ16-V1.1 USB-TTL with the WinChipHead CH340.





Pics


The RX/TX headers on the DX-PJ16-V1.1 are not for programming - they trace to UART-TX (P0) and UART-RX (P1) - pins 1 & 2. Meaning P10/P11 need soldering up to read/write flash.

After shield removal I can confirm it is the QFN32 BK7238




P0 115200 log

P0 115200 log


dump with BKFIL


https://github.com/openshwprojects/FlashDumps...mits/9ac8b34f85625ece82344a635c20ea3fa391fa22

and Easy Flasher. 2mb flash ID is 852015 - Puya P25Q16HBK


in BK7231N mode encryption key is read as 48e16b04 48e16b04 48e16b04 48e16b04 (but note)

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OpenBK7238 write success from 0x11000


P26 is WORK-STATUS/red LED, P17 is the KEY/button and P6 is the LINK-STATUS header

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So it's basically like NiceMCU. Thank you for interesting presentation! The "encryption key" mentioned is not really an encryption key, it's just a byproduct of the read disabled, I guess. I was also getting "random" keys on NiceMCU BK7238 and they all run well with unecrypted OBK.

p.kaczmarek2 wrote:

The "encryption key" mentioned is not really an encryption key, it's just a byproduct of the read disabled, I guess

yes, sure. thought I'd make mention of it though anyway

I do recall;

insmod wrote:

And keys readout is not disabled, since we can get at least something out of them, but addresses were probably just shifted,

This shop has more WiFi modules: http://en.szdx-smart.com/m/EN/WIFImk.html

What is Da16200?

p.kaczmarek2 wrote:

What is Da16200?

Some Renesas chip I've never heard of.

https://www.renesas.com/en/products/wireless-...gzF16aRSi4t6eW124Gvwo3NM0BhCQ3y2tlDQ1bNRvnhNQ



https://www.amazon.co.uk/PDDAXLQUE-Communicat...ansparent-Transmission-WF20-SET/dp/B0DT5L55KZ

p.kaczmarek2 wrote:

This shop has more WiFi modules

I got the DX-WF25 ESP-C3 too, not that I needed any more ESPs

It looks like NodeMCU clone, are the pinouts of the board/module here standarized? They call DX-WF25 a perfect replacement for ESP12E, so I would assume that at least VDD/GND/RESET/UART1 pins are matching..

p.kaczmarek2 wrote:

They call DX-WF25 a perfect replacement for ESP12E

12F*

p.kaczmarek2 wrote:

so I would assume that at least VDD/GND/RESET/UART1 pins are matching

indeed

Hi, I got the DX-WF24 for the purpose of using the wifi. I got the USB adaptor board and plugged the module into the USB. I don't know how to set up the wifi and I don't see a user manual to set up. Any feedback on this? I don't see any option to connect it to wifi router, so I am not sure if it's defective or not (the USB insert did have a dent on it which I fixed with a plier. I can see the red flashing on the chip indicating nothing is connected to it wifi-wise.

How do you want to use the WiFi? Which SDK are you using to program it?

[postid:fac9315b6c][/postid:fac9315b6c]

I want to use the wifi in general connect to a serial terminal for general communication as a test. I did use a separate bluetooth module of DX-smart and that worked really well and want to replicate it with wifi.

As for SDK, not sure because this is my first time to get a hold of this product. Do you have any suggestions? Using SSCOM trying to get some sort of communication.

Are you saying that you want to try it out with AT commands? Well, I don't know whether this module comes with preflashed AT package or not, maybe @divadiow knows? You still would need to connect it via USB to UART converter and try some commands over the terminal.

Still, maybe it would be easier to use OBK, depending on what your goal is? What kind of project are you making?

p.kaczmarek2 wrote:

Well, I don't know whether this module comes with preflashed AT package or not, maybe @divadiow knows?

it came with this

https://github.com/openshwprojects/FlashDumps/blob/main/IoT/BK7238/DX-Smart_DX-WF24A_AT.bin

I dont recall trying it out.

There are some AT mentions in the binary strings.

Hi, Thanks for the speedy replies. I contacted the manufacturer and they gave me some information and need to go through it. Will give an update when I try to figure things out. Thanks.

cool. what did they supply you with?