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Bluetooth communication (Read 84078 times)
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97 Sport1100i My16M MkVII
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Re: Bluetooth communication
Reply #30 - 08/21/12 at 03:04:07
 
I originally bought mine to use with my Buell XB9.  The Buell had a fixed 9600 baudrate and did not negotiate.  The default on my RN42 was 115200 so I had to change it manually.  I understand that is not necessary when using it with the MyECU.  Sorry about the confusion because I am dealing with two very different bikes.
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Indy40
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Re: Bluetooth communication
Reply #31 - 09/15/12 at 22:49:54
 
Hi All,
Just get a BT module on ebay as some of you.
Slight modifications on the connecting card to get the Tx/Rx.
Just put the SW4 "On" on "My16M".
And the Optimiser03.apk on my android device.

First test : the card is working, the BT is activated and I got a connection on my device with the Optimiser.
But after ... nothing : no real-time value or information.

Do I have missed something ?
Do I need a soft update of My16M ?
Do I need another BT device ?

Regards.
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Re: Bluetooth communication
Reply #32 - 09/16/12 at 04:22:16
 
Please keep the forum updated on your progress, I am sure I am not the only one considering going down this path.

Which BT module did you use, do you know it's specifications?

Thanks Bob.
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Indy40
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Re: Bluetooth communication
Reply #33 - 09/16/12 at 05:04:01
 
This module :

http://cgi.ebay.fr/Wireless-Serial-4-Pin-Bluetooth-RF-Transceiver-Module-with-Ba...

Specifications similar to the Roving Network RN-42 ...
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Re: Bluetooth communication
Reply #34 - 09/16/12 at 06:45:28
 
I do not see any specifications mentioned on that page. How do you know it is similar to the RN-42

Also Sw4 should be off. It only needs to be on for the first bluetooth modules from A7. They went bust.
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Re: Bluetooth communication
Reply #35 - 09/18/12 at 21:16:18
 
I use a BlueSMiRF Silver card which has RN42 on it and 5V TTL datalines.  https://www.sparkfun.com/products/10269

I also have sw4 on - have to change it.
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Re: Bluetooth communication
Reply #36 - 10/23/12 at 04:09:25
 
With regard to messages 25,26 and 27.  Did you get any closer to ways of using these RS232 Bluetooth modules.

If I just power one up with 5v without connecting it to anything does it transmit so my phone can see it? I would at least then know it does work.

Thanks.
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LOS
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Re: Bluetooth communication
Reply #37 - 10/23/12 at 04:59:18
 
Bluetooth Modem just replaces the cable.
It's your ecu that communicates using info on the following line in your map:

Bluetooth MyCaliECU 123456

MyCaliEcu or what you may change it is the device name and the figure is a password.

Using my HTC I have to go Settings & Network and enable Bluetooth and then in Bluetooth settings enable Discoverable so that ecu can find Optimiser when you start it.
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Bobd
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Re: Bluetooth communication
Reply #38 - 10/23/12 at 05:33:55
 
Thanks LOS, going back to message #26 of this thread you will see the BT module I bought appears to be a 3.3v TTL item, although that is obviously lower than the 5v the MyEcu works at I imagine it would still be detected as voltage pulses by the MyEcu and the very short term 5v pulses are unlikely to damage my BT unit, or am I wrong.

I suppose I could just solder the module up to a RJ45 plug and see what happens but hoped to get advice from the more knowledgeable.
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Re: Bluetooth communication
Reply #39 - 10/23/12 at 06:07:51
 
Electronics is not my profession but just a hobby.
I browsed some articles in the web where people soldered resistors on modem's motherboards but it seemed so tedious that I decided to spent 30+ Euros and buy a BlueSmirf from Germany. Jerrys have lower VAT than we in our tax hell called Finland(Sweden is alike) and I could'n find any in Finland. I also saw some modems which were about 10Euros as well but they all had 3.3V datalines.

Hard to say what will happen to your modem. I suspect it will fry but only trying will solve the problem.
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Re: Bluetooth communication
Reply #40 - 10/23/12 at 07:48:32
 
I've got both the modules but have not had the time to look at them.
Neither is a good proposition without some modification. I'm pretty sure the 5V RS232 would have inverted data signals on top of pushing 12V signals.
The 3V TTL would need some voltage reduction and would probably would need a data resistor as the ECU would be signalling at 5V
The supported module is only $40 so its not really worth avoiding.
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Re: Bluetooth communication
Reply #41 - 10/25/12 at 07:10:03
 
I see your point, I was happy with dropping the 5v to 3.3v with a resistance divider but had not thought of the fact that the RS232 is inverted compared with the TTL.

Anyone want a nice piece of pcb jewelry?
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Re: Bluetooth communication
Reply #42 - 10/25/12 at 07:24:47
 
Please explain again what specification the BT unit needs to be to connect it to the MyEcu.

1/ Is it RS232 or TTL

2/ Am I right in thinking it needs to be 5v.

3/ Do we simply plug the BT module directly to the MyEcu.

4/ Looking at the MyEcu RJ45 socket I can identify the ground and the 5v lines but don't know which is TX and RX.

5/ Assuming I can identify the TX line on the MyEcu RJ45 socket, does that go to the RX pin on the BT module as would seem logical.

6/ Having got the module correctly plugged into the MyEcu is it now only a matter of setting the transmission protocol, and speed.

7/  What is the protocol,  what is the speed?

8/ Lastly I gather I must set the bluetooth password within the MyEcu program via EcuController to match the BT unit.

Sorry if this all seems a bit laboured, I am trying to understand the situation.
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« Last Edit: 10/25/12 at 07:29:22 by Bobd »  
 
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Re: Bluetooth communication
Reply #43 - 10/25/12 at 07:42:15
 
The dongle is 5V TTL just like the USB to serial converter and it is connected to the ECU in exactly the same way.

Here http://www.cajinnovations.com/MyECU/pics/My16MMkIII_PCB.png you can see which to pins in the connector go straight to the chip. The tx is left most on the connector and goes to the rx on the module.

There is nothing to do for speed protocol except pair the BT donlge to the phone. I think 1234 as the PIN works.

The Bluetooth parameters in the map are not used. They are for the first gen dongle.
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Re: Bluetooth communication
Reply #44 - 10/25/12 at 08:44:49
 
Thanks, it looks as if my BT module may work as it is TTL.
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