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FM transmitter module: help to recognize IC
FM transmitter module: help to recognize IC
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Old 15th September 2019, 01:32 PM   #1
NovaPA is offline NovaPA  Russian Federation
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Default FM transmitter module: help to recognize IC

Dear collegues
On Ebay / Ali such simple, and high-quality FM transmitter modules are sold

Please help determine what it is made of? What kind of chip?
Googling the inscription on it does not give anything at all.

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Old 15th September 2019, 01:54 PM   #2
avtech23 is offline avtech23  Australia
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FM transmitter module: help to recognize IC
Not sure about the chip but there is a write up of a similar one here:

Review, Tested: Generic USB FM Transmitter (FM_MIC_V5.0.9) | Gough's Tech Zone

And another here:

Quote:
This JQ-D015BT module has the AC181IDE1234-01 SoC manufactured by JL (logo that looks like a PI symbol). It has built-in music decoders, Bluetooth circuitry, memory card interface, and display drivers. By placing everything on a single chip, there is virtually nothing on the board except some SMD resistors, capacitors, and a clock crystal. However, all of this is good for the consumer because you get something that costs virtually nothing to produce and use. SoC technology is progressing at a fast pace and factories in China are already producing the next generation of modules that can decode audio and video. Consequently, there is a huge selection of modules offering a wide range of functions for all sorts of applications.

I was not able to find any information about the AC181IDE1234-01 SoC, as these technologies are usually kept secret. Manufacturers usually do that when they want to prevent anyone copying their designs. However, if you have a block diagram or datasheet, then feel free to send it.
MP3 Player Module with Bluetooth


Manufacturer of the SOC is likely to be Jeilin Technologies, Taiwan.
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Last edited by avtech23; 15th September 2019 at 02:09 PM.
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Old 19th September 2019, 09:07 AM   #3
NovaPA is offline NovaPA  Russian Federation
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Thank You.
I saw those blog.

Also, on another forum one collegue found an answer.
FM transmitter is http://down.cosou.com/xintechsz.com/QN8027.pdf
Big chip is STM16 MCU...

And there is another question: where can i found an list of AT commands to control this board via UART?
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Old 19th September 2019, 11:32 AM   #4
avtech23 is offline avtech23  Australia
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FM transmitter module: help to recognize IC
Check out the last page of the attached .pdf for the codes.
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File Type: pdf 91MxCDnvivL.pdf (770.7 KB, 8 views)
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Old 19th September 2019, 04:26 PM   #5
NovaPA is offline NovaPA  Russian Federation
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Thank You!
Tried...
Right after connection the board returns message: s)FM TX mode

But after - has no any response for all commands...
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Old 19th September 2019, 04:31 PM   #6
avtech23 is offline avtech23  Australia
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FM transmitter module: help to recognize IC
Did you use a USB / RS232 to TTL level converter?

FM transmitter module: help to recognize IC-capturettl-jpg
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Old 19th September 2019, 05:09 PM   #7
NovaPA is offline NovaPA  Russian Federation
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I saw this... I thought - if my USB-TTL board reads the transmitter's message - thah signal levels or RX and TX must be matched...
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