I bought a few bluetooth modules off Fasttech. The silkscreen on the board bottom says JY-MCU BT Board V1.06. I know this means that the board is supposed to be HC-06 but when I pair it with my Windows machine it shows up as HC-09.
Any idea how I can get into the AT commands mode with these? I tried searching but couldnt find much info on these modules. I tried the methods used for the HC-06 and it didn't work. I also tried unpairing it from my computer and then accessing the AT commands but that didn't work either.
electrophile:
I bought a few bluetooth modules off Fasttech. The silkscreen on the board bottom says JY-MCU BT Board V1.06. I know this means that the board is supposed to be HC-06
This probably doesn't help but, no, it doesn't. The JY-MCU backboard is used for the HC-05 as well. If it has six pins, it is likely, but not certainly, an HC-05. If it has four, it is an HC-06 because that is all that it needs, while the HC-05 needs six. The same probably applies to the HC-09. I understand the HC-09 is, or probably was, a drop in replacement for the HC-06 and uses the same configuration procedure. If Windows says it's an HC-09, it probably is.
Any idea how I can get into the AT commands mode with these? I tried searching but couldnt find much info on these modules. I tried the methods used for the HC-06 and it didn't work. I also tried unpairing it from my computer and then accessing the AT commands but that didn't work either.
I'm not surprised about the shortage of information. I have never seen one for sale and never before heard of anybody actually having one. I don't think the pairing is a problem, just so long as it isn't actually connected. I understand it should be configured just like an HC-06.
I would be interested to hear how you fare with this. In the meantime I will conclude that an HC-09 is something to be avoided.
Yeah this one is definitely to be avoided. I did some more tinkering with it. I connected it to a computer using an FTDI breakout board. With that I was able to send AT commands, however, they did not seem to retain on a power cycle. I had changed the PIN and the next time I tried pairing, the new PIN did not work while the default 1234 still worked.
Thanks for your comment. I have never used that method to configure bluetooth. I guess the vital question is - did it respond with "OK" when you sent a command? If yes, I guess it's time to give it away.