Microsquirt and bluetooth module HC-05

All questions about MS2/Microsquirt/Microsquirt module. See also MS2/Extra manuals

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Re: Microsquirt and bluetooth module HC-05

Postby old guy » Mon Feb 08, 2016 2:30 pm

On my Microsquirt I put a DB9 socket in the end plate and hooked up a 7805 regulator for the 5V. Would probably have been better to use a DC to DC module, but I didn't have one at the time. I also put a switch to turn off the 5v if I wanted to use a serial cable.
I found that the HC-05 modules with the DB9 at both end were the easiest ones to work with. http://www.ebay.com/itm/Arduino-DB9-RS2 ... xydl5SHvIn
Plug one end into your Pc serial port to program and the other end plugs into your MS. Digi-Key also sells a plastic cover that fits this unit.
If you look in the $7 bluetooth thread I posted a link and a picture.
It's been a while, but if I recall all you had to do was plug in the module and it would accept AT commands. No jumpers or resistors.
A lot of people don"t know is that there are two different modes of AT commands on these modules depending on how they are jumpered.
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Re: Microsquirt and bluetooth module HC-05

Postby olafesq » Wed Feb 10, 2016 3:50 am

I want to point out, that the bare-bone BT module works on 3.3V TTL, but tolerates 5V TTL too, so I'm tapping the BT TX/RX straight on the MS chip TX/RX, ie before the Max 3221 RS232 serial converter on the MS board. The bare-bone BT module needs 3.3V to power and the module I'm using has a regulator 5V to 3.3V on the module board (blue board under the green BT board), that takes care of it.

Doing it that way avoids the signal converting from MS TTL -> RS232 -> back to TTL for BT.

Cheers,
Olaf
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Re: Microsquirt and bluetooth module HC-05

Postby gui67 » Mon Dec 25, 2017 8:34 am

slow_hemi6 wrote:I have this one. It has everything on board as opposed to just the bare module.
Image


Would this work if I wire a dB9 connector with txnrx gnd and 5v from the microsquirt?

What are the other possibilities ?
Hc05 inside the case connected directly to the cpu

And for a ms3pro? Is it the same?
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Re: Microsquirt and bluetooth module HC-05

Postby LAV1000 » Mon Dec 25, 2017 8:48 am

@gui67,
Check this one:
viewtopic.php?f=123&t=65858
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Re: Microsquirt and bluetooth module HC-05

Postby grom_e30 » Mon Dec 25, 2017 12:54 pm

gui67 wrote:
slow_hemi6 wrote:I have this one. It has everything on board as opposed to just the bare module.
Image


Would this work if I wire a dB9 connector with txnrx gnd and 5v from the microsquirt?

What are the other possibilities ?
Hc05 inside the case connected directly to the cpu

And for a ms3pro? Is it the same?


this did not play nice with my microsquirt. it worked ok with my ms3.
1990 bmw 320i daily driver with m20b25 ms3 sequential fuel, 380cc injectors, d585 coil near plug, home made cam sync, launch control, fan control, vss, homebrew egt logging what's next????
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Re: Microsquirt and bluetooth module HC-05

Postby revan_bolo » Mon Dec 25, 2017 1:58 pm

hi I wasn't sure if I should make a new post, but my question is will a kindle hd fire 8 work with the blue tooth connection for ms3?
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