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Bluetooth communication (Read 82201 times)
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Re: Bluetooth communication
Reply #45 - 10/25/12 at 09:12:18
 
TTL is a rather vague term and really just means chip to chip.
It can be 5V or 3V

Also the Android Optimiser configures the BT module so if its not the same BT chipset it will require another set of initialisation commands.
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Re: Bluetooth communication
Reply #46 - 10/26/12 at 01:14:23
 
Please advise which bt module to use and its specifications.

Thanks.
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Re: Bluetooth communication
Reply #47 - 10/26/12 at 07:44:19
 
Its been mentioned a number of times - https://www.sparkfun.com/products/10269
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Re: Bluetooth communication
Reply #48 - 11/04/12 at 16:53:44
 
YaBB Administrator wrote on 10/26/12 at 07:44:19:
Its been mentioned a number of times - https://www.sparkfun.com/products/10269


Thanks for clarifying that. 

And you solder the bluetooth modum's pads to the wires of a lan cable, to connect the sparkfun 10269 unit to the MyECU?  Is that right? 

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Re: Bluetooth communication
Reply #49 - 11/05/12 at 08:19:57
 
That's right. Very similar to the way the USB connector is wired now
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Re: Bluetooth communication
Reply #50 - 11/07/12 at 01:08:36
 
Bobd, did you ever get either of your economical bluetooth modules to work?
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Re: Bluetooth communication
Reply #51 - 11/07/12 at 01:38:41
 
To be honest with you no I have'nt. 

I am still a bit confused with how to wire them up, the voltage implications and the suggestion that not all BT modems will work with the MyEcu. I have'nt had the nerve to connect one up yet. If I connect one up just to power source should my Android phone 'see' it?  That would seem to the first step I will have to try to at least get it in contact with the phone before connecting it to the MyEcu, should only blow the BT module then if I get it wrong.

I have my house up for sale at the moment and am having to live extra tidily, or "like normal folk" according to my wife, so no boxes of bits and soldering irons laying around. Taking a little time to find things now as everything is in boxes to show how uncluttered the place is........ Embarrassed Cry
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« Last Edit: 11/07/12 at 01:42:49 by Bobd »  
 
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Re: Bluetooth communication
Reply #52 - 11/07/12 at 09:45:26
 
Selling a house is a huge pain, and I can understand not wanting to blow the MyECU unit.

Best of luck on the sale.
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BT success & summary
Reply #53 - 11/23/12 at 04:22:39
 
Hi, here is a short update and summary of getting an older My16M to work with BT Optimiser. This information can be found elsewhere in the forum but it is a bit scattered.

My16M used here : http://files.myopera.com/v2tre/albums/6329701/2012-10-11-1185.jpg

1. For BT communication, you need a MyECU with recent enough firmware version. If in doubt check from Cliff.

2. You also need a new enough ATMega processor chip (ATMega 324) to  match up with the newer firmware.

3. The one BT modem that is known to work ok is this one : https://www.sparkfun.com/products/10269

4. The BT modem is connected with a modified cable into the RJ45 plug on the MyECU board : http://files.myopera.com/v2tre/albums/6329701/2012-11-21-1326.jpg

The wiring of the modem is easy. Just ensure that you connect the Vcc (+5 V) and GND correctly. Then connect Tx from the MyECU to Rx at the BT modem and Rx from the MyEcu to Tx at the BT modem. Plug your new cable to the board : http://my.opera.com/v2tre/albums/showpic.dml?album=6329701&picture=171052272#big...

5. Download the Android Optimiser and install to your phone. I think the latest version is here : http://www.cajinnovations.com/MyECU/ECUController/Optimiser06b.apk

6. Power up MyECU and you see led blinking on BT Modem.

7. Pair your phone with the BT modem. It will be shown as "RN-42 something" and the pin is 1234. Please note that the name and bin in the map-file seem not anymore have any meaning. Those can be ignored. Your phone might show notification : "Paired but not connected". Led is now lighted continuously.

8. Now when the phone is paired with the modem, launch the Optimiser App. Inside the App you need to select the BT modem to make up the connection. After that you can start using the other features.

Here My16M is talking with Samsung phone over the BT : http://files.myopera.com/v2tre/albums/6329701/2012-11-21-1324.jpg

Please correct any mistakes or errors.

br, JuhaV
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« Last Edit: 11/23/12 at 04:34:42 by JuhaV »  
 
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Re: Bluetooth communication
Reply #54 - 11/23/12 at 04:33:06
 
A few more things ...

Easiest way to ensure that you make up your cable correctly is to check the location of the Vcc, GND, Rx and TX lines here : http://circuits.datasheetdir.com/18/ATMEGA324P-pinout.jpg

Pin 14 is Rx, pin 15 is Tx.

(
ERRATA 22.11.2012
: I linked an incorrect page here first, now the above link goes to correct pin schematics Sorry for that !)

Then you can see their route to the connector here : http://www.jefferies-au.org/MyECU/pics/My16MMkIII_PCB.png

What I did was that I removed the ATMega from the board, plugged in a cut RJ45 cable and measured with ohm meter which of the wires of the cable were connected to the correct pins at the ATMega 40 pin socket.

The corresponding Vcc, GND, Tx and Rx are clearly marked on the BT modem board. Do not forget to cross the Rx-Tx lines between ECU and BT modem.

I believe that the DIP switch 4 should nowadays also remain "off" as the firmware does not perform any special initialization of the BT modem but uses the connection in similar manner as the "standard" wired RS232 connection.

Hopefully this is helpfull.

- JuhaV
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« Last Edit: 11/23/12 at 07:04:51 by JuhaV »  
 
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Re: Bluetooth communication
Reply #55 - 11/23/12 at 06:38:12
 
Thankyou JuhaV, you have encouraged me to take another look at this method of connecting to the MyEcu.
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Re: Bluetooth communication
Reply #56 - 11/23/12 at 07:11:48
 
Bobd, hopefully that info helps you.

One more observation : We tried the Optimiser Apps with two different phones. Recent model Samsung (I think it was Galaxy S3) worked ok but an older HTC Wildfire S only made the connection with BT but could not run the Optimiser Apps properly.

It might have been that HTC did not have enough free memory to perform properly.

- JuhaV
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Re: Bluetooth communication
Reply #57 - 11/23/12 at 09:14:01
 
I am hoping to use a Samsung Galaxy Mini
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Re: Bluetooth communication
Reply #58 - 11/24/12 at 02:59:22
 
JuhaV, thanks for the information.  I'm interested in going Bluetooth too.  I'm using a Sony P tablet with Android.
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Re: Bluetooth communication
Reply #59 - 11/25/12 at 01:13:51
 
Hi guys

Here a source of this modules in europe. Not much more expensive than direct from sparkfun, and no need to worry with customs.

http://www.hobbytronics.co.uk/wireless/bluetooth/bluesmirf-silver
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