Add send_request after cmd 21 (src:00 dst:c8)

[dansck]

I have Samsung AC090HCADNH and there is no match command for send requests after a lage gap.
There is a lage gap after cmd 21 (src:00 dst:c8), i added this match to send requests.

[lanwin]

@dansck thank you for that pullrequest!

@matthias882 could you please have a look at this?

[matthias882]

Negativ. In my setup ist no gap, directly after the cmd21-message from indoor-unit 00 the outdoor-unit send a request to indoor-unit 01. between this 2 messages are only ~70ms of free space. I tried to put our contoll-message in there but with no success.

I think in the setup of dansck is only one indoor unit?

[dansck]

Negativ. In my setup ist no gap, directly after the cmd21-message from indoor-unit 00 the outdoor-unit send a request to indoor-unit 01. between this 2 messages are only ~70ms of free space. I tried to put our contoll-message in there but with no success.

I think in the setup of dansck is only one indoor unit?

yes i have only 1 indoor unit, and in my setup this is the only long gap, and two matching commands in your code never happen.

[matthias882]

in my setup are 3 long gaps.

1. after src:C8 dst:D0 cmd:C6 (the message to D0 only appears when SNET was activated)
2. after src:C8 dst:F0 cmd:F8
3. after src:C8 dst:AD cmd:D1

[matthias882]

cmd:C6 is already implemented in Line 519.
Sending after cmd:21 leads to a collision on bus and this causes the bus-communication to stop for some seconds in systems with more than 1 indoor-unit.

the correct way would be to send after cmd:C6. For this we need to investigate how to start this polling from master like it the SNET-software does.

[lanwin]

@matthias882 its a petty simple message to turn that on. I send it to you in one of the other threads. Not sure yet witch one it was.