Externet
Well-Known Member
Two devices, as an error code reader and a dedicated computing device similar to an ECU in an automobile talk to each other to retrieve data and place commands.
Being such specialized code reader expensive, I wonder if a laptop could be tapped onto the data lines and record the handshaking and the data transceived for every command.
Example: At plug in, recording the handshake.
When key number 1 in the reader is pressed, record the command.
When the 'ECU' responds, record the data.
When key number 2 on the reader is pressed, record the command.
When the 'ECU' responds, record the data... and so on.
With all that recorded in the laptop, emulate the same process without the dedicated reader device, using the laptop instead.
(The reader device for the example is not a ECU reader; the device has multiple applications but only one is needed and does not justify the cost)
What would be the way to do it ? Is any existing application being used for similar task ? Tapping hardware via USB, parallel or serial port ?
Being such specialized code reader expensive, I wonder if a laptop could be tapped onto the data lines and record the handshaking and the data transceived for every command.
Example: At plug in, recording the handshake.
When key number 1 in the reader is pressed, record the command.
When the 'ECU' responds, record the data.
When key number 2 on the reader is pressed, record the command.
When the 'ECU' responds, record the data... and so on.
With all that recorded in the laptop, emulate the same process without the dedicated reader device, using the laptop instead.
(The reader device for the example is not a ECU reader; the device has multiple applications but only one is needed and does not justify the cost)
What would be the way to do it ? Is any existing application being used for similar task ? Tapping hardware via USB, parallel or serial port ?