Hi Guys,
Would anyone have any information on the physical connection and data protocol used by the S1 a\c amplifiers? I believe they are a Denso product.
I have been trying to communicate with my A\C amplifier but haven’t had much success.
It looks to be asynchronous serial I think at about 4800
When I do listen for data I don’t see any really obvious repeating patterns - this might be because it is not normal serial timing and my analyzer is confused.
Nor was I able to talk to it directly with an Arduino, by repeating the data I picked up while monitoring.
I think for the inbound line the a\c amplifier acts as a sink for the signal from the head unit – I was able to read some sort of data with arduino by tying the digital input to ground with a 10k resistor.
But this is a little out ot my comfort zone and I am worried I might break something.
- I did by an old bose head unit for testing but damaged a transistor in the a\c outbound path while I was testing controls for the console display (a loose wire or a bad connection on my part)
If anyone has looked at this before\knows anything about it, I would really appreciate some input\advise.
Thanks Tony
Would anyone have any information on the physical connection and data protocol used by the S1 a\c amplifiers? I believe they are a Denso product.
I have been trying to communicate with my A\C amplifier but haven’t had much success.
It looks to be asynchronous serial I think at about 4800
When I do listen for data I don’t see any really obvious repeating patterns - this might be because it is not normal serial timing and my analyzer is confused.
Nor was I able to talk to it directly with an Arduino, by repeating the data I picked up while monitoring.
I think for the inbound line the a\c amplifier acts as a sink for the signal from the head unit – I was able to read some sort of data with arduino by tying the digital input to ground with a 10k resistor.
But this is a little out ot my comfort zone and I am worried I might break something.
- I did by an old bose head unit for testing but damaged a transistor in the a\c outbound path while I was testing controls for the console display (a loose wire or a bad connection on my part)
If anyone has looked at this before\knows anything about it, I would really appreciate some input\advise.
Thanks Tony
Controlling the a\c amplifier
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