Wtd: Firmware for JDY-40 2.4GHz wireless Uart module

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Gordy7

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#265763 10-Feb-2020 09:37

I bought 4 JDY-40 modules from AliExpress but they don't work as expected.
These are 9600baud serial Uart modules with a range of 120m

All I see on power up from TxD is "START" which makes me think that there is no Firmware loaded and the bootloader is waiting for some code.

I have done a lot of Google searches and even asked the AliExpress supplier for help... No success. Dispute time has finished.

The chip on board is a BK2461.... I have searched for Firmware on this chip too. Have yet to check out the bootloader procedure.

I have ordered some more JDY-40 modules from another supplier on AliExpress... Some weeks away....
If they work I may be able to pull the code out and install it on the first batch.

Any help would be most appreciated.

Gordy

My first ever AM radio network connection was with a 1MHz AM crystal(OA91) radio receiver.

floydbloke

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#2415459 10-Feb-2020 10:02

Tell me to crawl back under my rock if I'm being completely ignorant here, but don't you just 'program' it with a bunch of AT commands?

Sometimes I use big words I don't always fully understand in an effort to make myself sound more photosynthesis.

Gordy7

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#2415479 10-Feb-2020 10:21

floydbloke:
Tell me to crawl back under my rock if I'm being completely ignorant here, but don't you just 'program' it with a bunch of AT commands?

Would be good if the AT command worked.... but nothing.... as I have found the only response after power up is "START" from TxD.... I have actually 'scoped RxD in to the module right up to the chip.

Gordy

My first ever AM radio network connection was with a 1MHz AM crystal(OA91) radio receiver.

Gordy7

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#2415484 10-Feb-2020 10:30

Just an added note.. I am using an FTDI USB serial adapter under Windows 10. I can successfully communicate with a bluetooth module into the same FTDI socket as I have been using for the JDY-40.

Gordy

My first ever AM radio network connection was with a 1MHz AM crystal(OA91) radio receiver.

floydbloke

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#2415487 10-Feb-2020 10:36

Gordy7:
floydbloke:

Tell me to crawl back under my rock if I'm being completely ignorant here, but don't you just 'program' it with a bunch of AT commands?

Would be good if the AT command worked.... but nothing.... as I have found the only response after power up is "START" from TxD.... I have actually 'scoped RxD in to the module right up to the chip.

Have you tried setting pin 12 to low.

https://www.electrodragon.com/w/images/0/05/EY-40_English_manual.pdf

Sometimes I use big words I don't always fully understand in an effort to make myself sound more photosynthesis.

Gordy7

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#2415508 10-Feb-2020 11:46

floydbloke:

Have you tried setting pin 12 to low.

Thanks for checking...
Yep... CS and SET low....

Gordy

My first ever AM radio network connection was with a 1MHz AM crystal(OA91) radio receiver.

Gordy7

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#2417088 13-Feb-2020 09:02

Fixed - or perhaps better understood getting the JDY-40 AT commands to work.

Tried various serial terminal programs... Teraterm, ZOC7.

Ended up using UwTerminalX which worked.

In addition I had overlooked the requirement for end-of-line CR-LF and all AT commands needed to be upper case.

Gordy

My first ever AM radio network connection was with a 1MHz AM crystal(OA91) radio receiver.