My Uart adapter v. 1.2 does not work anymore.

[urun4fun]

Bought the UART v.1.2 for a long time ago, and tried the rpm example. And it worked as expected.

now I finally have the time to play with this.

I use the included rpm example and no problem uploading to arduino, but i does not work.

has something changed since the UART adabter was made?

Are there some new configuration to be made. It looks like the .h file needs to be altered. I have tried that, but no effect.

I have followed the instructions on the freematics site. I am using an arduino uno, so i cant put in serial to see what is going on.

[azzamsaziz]

Let's see if he ever responds. I have the same issue. Welcome to the club. He refuses to fix it.

[urun4fun]

Ok, I will try it on another car. I have made a control unit for a fuel burning heater in my car, using an arduino and a gprs module, So I would very much like to get the coolant temperature from OBD II.

@stanleyhuangyc
Do you know if the TTL adapter will work with the RPM code?

[azzamsaziz]

It won't work with another car, but let me know.

Good luck getting help from him. I hope you can so I can get my stuff working as well. You may try the kit #2 which uses I2C and it would work. If you ask him about the 4884 display and OBD-2 using UART he's gonna say that code is not supported anymore. Even though he put it out and sells the parts.

[azzamsaziz]

I found a solution. Finally. The UART adapter is no longer supported by @stanleyhuangyc it seems so you can go ahead and throw your adapter and money in the trash or wait until I debug his code and see what's wrong.

The good news is it works with I2C. What you'll need is to connect the YELLOW to A4 (SDA) and WHITE to A5 (SCL) because I2C does NOT use TX and RX, it uses SDA and SCL. Something he fails to explain at a very low level.

Once you do that, you can continue to work on your project.

[azzamsaziz]

@urun4fun

[stanleyhuangyc]

You can't use your I2C adapter as a
  UART adapter. That's so obvious. Stop talking nonsense here!

  On 2014/12/27 5:54, Azzam Aziz wrote:


  I found a solution. Finally. The UART adapter is no longer
    supported by @stanleyhuangyc
    it seems so you can go ahead and throw your adapter and money in
    the trash or wait until I debug his code and see what's wrong.
  The good news is it works with I2C. What you'll need is to
    connect the YELLOW to A4 (SDA) and WHITE to A5 (SCL) because I2C
    does NOT use TX and RX, it uses SDA and SCL. Something he fails
    to explain at a very low level.
  Once you do that, you can continue to work on your project.
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