Messages¶

These are the address found on the 12 bus :

41
146
242
243
34
35
50
47
63

REQUESTS / REPLIES ANALYSIS¶

Here I try to report any communication pattern I can find :

41 - 146 interaction¶

Messages exchanged between Hi-mit interface and outdoor unit
WIP

47 - 242 interaction¶

|47|0|10|202|160|1|1|108|0|12|
ACK from 242
|242|0|48|1|1|1|1|108|62|0|31|129|129|27|0|0|0|0|0|0|0|22|0|0|0|0|0|0|0|20|60|50|7|24|25|129|129|0|100|3|0|0|8|0|4|0|0|7|
ACK from 47

50 - 35 interaction¶

|50|0|9|1|1|1|0|240|248|
ACK from 35
|35|0|36|1|0|1|1|255|0|40|32|0|0|0|2|0|3|34|128|31|0|31|128|18|170|0|0|0|41|41|1|3|241|208|0|106|
ACK from 50
|50|0|28|1|1|1|0|255|24|32|0|7|24|33|129|34|30|30|0|0|25|0|62|0|6|0|2|100|
ACK from 35
|35|0|14|1|0|1|1|254|16|32|16|32|0|241|
ACK from 50
|50|0|32|1|1|1|0|159|31|129|129|20|60|0|7|129|31|26|100|3|0|0|0|0|0|0|0|0|0|2|0|111|
ACK from 35

63 - 243 interaction¶

|63|1|9|202|160|1|0|0|99|
ACK from 243
|243|1|48|1|0|0|255|192|6|0|0|2|0|0|0|0|0|0|0|0|0|66|34|18|178|0|0|60|20|31|0|9|31|0|145|0|0|0|0|33|0|24|0|30|0|0|0|92|
|63|1|9|202|160|1|0|1|98|
ACK from 243
|243|1|48|1|0|0|255|193|6|0|0|0|0|26|0|0|0|0|7|0|0|0|129|0|0|0|31|0|0|100|31|0|0|0|0|3|129|0|0|0|0|0|129|0|0|0|0|243|

AUTODISCOVERY ??¶

From time to time these messages appears on the bus, they are not always grouped together, maybe they are used to report their presence ?

|35|0|28|1|0|1|255|242|3|34|128|31|0|31|128|18|170|0|0|0|41|41|1|3|241|208|0|171|
|50|0|9|1|1|1|255|241|6|
|41|0|9|202|160|255|255|241|146|

ALL MESSAGES¶

ADDRESS 41 ( HI-MIT INTERFACE )¶

|41|0|9|202|160|255|255|241|146|
|41|0|9|202|160|1|1|97|2|

|41|0|48|202|160|1|1|107|62|31|8|255|11|12|45|24|0|0|26|28|28|28|28|28|28|28|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|211|
|41|0|48|202|160|1|1|107|62|0|8|0|11|12|45|24|0|0|26|28|28|28|28|28|28|28|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|51|

ADDRESS 146 ( PCB1 BOARD ? )¶

Messages coming from 146 seems to be associated with the master controller status

|146|0|12|1|1|1|0| 99 |62| 3 | 9 |90| <- VIENE INVIATO QUANDO IL MASTER CONTROLLER CAMBIA LA TEMPERATURA ACQUA CICLO 1 - 9°C
|146|0|12|1|1|1|0| 99 |62| 3 | 11 |88| <- VIENE INVIATO QUANDO IL MASTER CONTROLLER CAMBIA LA TEMPERATURA ACQUA CICLO 1 - 11°C
|146|0|12|1|1|1|0| 99 |62| 4 | 17 |69| <- VIENE INVIATO QUANDO IL MASTER CONTROLLER CAMBIA LA TEMPERATURA ACQUA CICLO 2 - 17°C
|146|0|12|1|1|1|0| 99 |62| 10 | 22 |76| <- VIENE INVIATO QUANDO IL MASTER CONTROLLER CAMBIA LA TEMPERATURA CICLO 1 AMB1 - 22°C

I messaggi con intestazione |146|0|12|1|1|1|0| 99 |62| sembrano essere generati quando vengono effettuate modifiche sul master controller interno. Il primo byte successivo sembra indicare l'id del parametro modificato ed il byte successivo contiene il valore modificato.

Inviato quando seleziono la modalità HEAT
|146|0|30|1|1|1|0|99|62|1| 64 |3|20|4|20|11|22|12|22|13|22|14|22|15|22|16|22|17|22|24|
|146|0|12|1|1|1|0|99|62|22|128|198|

Inviato quando seleziono la modalità COLD
|146|0|30|1|1|1|0|99|62|1| 8 |3|13|4|16|11|28|12|28|13|28|14|28|15|28|16|28|17|28|71|
|146|0|12|1|1|1|0|99|62|22|160|230|

Inviato quando seleziono la modalità AUTO
|146|0|28|1|1|1|0|99|62|1| 4 |3|28|11|0|12|0|13|0|14|0|15|0|16|0|17|0|80|

Il seguente messaggio di 48 Byte sembra essere un aggiornamento di stato periodico
|146|0|48|1|1|1|0|97|62|0|8|0| 11 |12|45|24|0|0|0|26|28|28|28|28|28|28|28|0|0|0|0|160|0|0|0|0|0|0|0|0|0|0|0|0|0|0|0|242|

ADDRESS 242 (UNKNOWN)¶

|242|0|48|1|1|1|1|108|62|0| 7 |129|129|27|0|0|0|0|0|0|0|22|0|0|0|0|0|0|0|20|60|50|20|24|12|129|129|0| 14 |3| 14 |0|24|2|4|1|1|111|
WATER TEMP (IN/OUT?) | WATER PUMP SPEED % | WATER FLOW LEVEL ?

ADDRESS 50 (UNKNOWN)¶

|50|0|9|1|1|1|0|240|248|
|50|0|9|1|1|1|255|241|6|

|50|0|28|1|1|1|0|255|24|32| 0 |22|24| 16 |129|20| 11 |12|0|0|22|0|62|0|6|0|2|122|
IDU GAS TEMPERATURE (16) | WATER OUT PHEX TEMP (11) |
11^ BYTE becomes 1 when cooling is enabled. Change to 17 when water pump is running.

|50|0|32|1|1|1|0|159|30|129|129|20|60|0|7|129|30|26|100|3|0|0|0|0|0|0|0|0|0|2|0|111|

ADDRESS 35 (UNKNOWN)¶

|35|0|14|1|0|1|1|254|16|32|16|32|0|241|
Message unknown, does not seems to change with time: looks like a request.

|35|0|28|1|0|1|255|242|3|22|128| 25 |0| 51 |128| 17 |110|0|0|0|41|41|1|3|241|208|0|114|
EVAP GAS TEMP | DISCHARGER TEMPERATURE | IDU LIQUID TEMP

|35|0|36|1|0|1|1|255|0|40|32|0|0|0|2|0|3|20|128| 22 |0| 42 |128| 14| 100|0|0|0|41|41|1|3|241|208|0|178|
EVAP GAS TEMP | DISCHARGER TEMPERATURE | IDU LIQUID TEMP
Message similar to the previous one with added 8 byte.

ADDRESS 47 (UNKNOWN)¶

|47|0|10|202|160|1|1|108|0|12|
Message unknown, does not seems to change with time: looks like a request.

ADDRESS 63 (UNKNOWN)¶

|63|1|9|202|160|1|0|0|99|
|63|1|9|202|160|1|0|1|98|

When the first message is sent it is acked by 243. Then follows this reply:

|243|1|48|1|0|0|255|192|6|0|0|2|0|0|0|0|0|0|0|0|0|64|30|17|159|0|0|60|20|30|0|1|30|0|145|0|0|0|0|34|0|24|0|29|0|0|0|68|

The second message from 63 is then sent and acked again by 243. Follows the reply :

|243|1|48|1|0|0|255|193|6|0|0|0|0|26|0|0|0|0|7|0|0|0|129|0|0|0|29|0|0|100|29|0|0|0|0|3|129|0|0|0|0|0|129|0|0|0|0|243|

ADDRESS 243 (UNKNOWN)¶

|243|1|48|1|0|0|255|192|6|0|0|2|0|0|0|0|0|0|0|0|0|64|30|17|159|0|0|60|20|30|0|1|30|0|145|0|0|0|0|34|0|24|0|29|0|0|0|68|
|243|1|48|1|0|0|255|193|6|0|0|0|0|26|0|0|0|0|7|0|0|0|129|0|0|0|29|0|0|100|29|0|0|0|0|3|129|0|0|0|0|0|129|0|0|0|0|243|