0001: RF Check

See:

15:13:02.772 053  W --- 01:145038 --:------ 01:145038 0001 005 FC00000505
15:13:02.873 053 RQ --- 01:145038 13:237335 --:------ 0016 002 00FF
15:13:02.884 054 RP --- 13:237335 01:145038 --:------ 0016 002 0017

15:01:25.064 068  W --- 01:145038 --:------ 01:145038 0001 005 0000000505
15:01:25.273 067 RQ --- 01:145038 04:056059 --:------ 0016 002 00FF
15:01:25.374 067 RQ --- 01:145038 04:056061 --:------ 0016 002 00FF

... and:

15:13:19.757 053  W --- 01:145038 --:------ 01:145038 0001 005 FF00000505
15:13:24.758 054  W --- 01:145038 --:------ 01:145038 0001 005 FF00000505
15:13:29.758 068  W --- 01:145038 --:------ 01:145038 0001 005 FF00000505
15:13:34.759 063  W --- 01:145038 --:------ 01:145038 0001 005 FF00000505

See also:

12:13:32.719 045  W --- 04:061402 --:------ 01:078710 0001 005 0400000505

... and finally:

20:00:05.997 095 RQ --- 18:013393 01:145038 --:------ 0001 005 FF00000505
20:00:06.012 045 RP --- 01:145038 18:013393 --:------ 0001 007 FF00000505052A

20:00:39.707 095 RQ --- 18:013393 01:145038 --:------ 0001 005 FF000005FF
20:00:39.723 045 RP --- 01:145038 18:013393 --:------ 0001 007 FF00000505052B

20:00:47.163 095 RQ --- 18:013393 01:145038 --:------ 0001 005 0100000500
20:00:47.178 045 RP --- 01:145038 18:013393 --:------ 0001 007 FF00000505052A

21:44:54.356 095 RQ --- 18:013393 01:145038 --:------ 0001 005 FC00000505
21:44:54.372 045 RP --- 01:145038 18:013393 --:------ 0001 007 FF000005050527

If you press the seemingly pointless button on the front of the HGI80 it alternates between the two following messages each time you press:

---  I --- --:------ --:------ --:------ 0001 005 00FFFF0200                 
---  I --- --:------ --:------ --:------ 0001 005 00FFFF02FF

Payload Structure

These packets are always 2 bytes long and contain a domain ID and % demand.

segment	size	contents
domain_id	[0:2]	0xF9, 0xFA or 0xFC, or zone_idx
??	[2:6]	0x00
??	[6:8]	0x05
??	[8:10]	0x05

In the majority of cases, the domain_id is one of:

• F9: stored DHW
• FA: central heating (circulating volume)
• FC: the boiler (or similar)

However, the domain_id could also be a zone_idx (0x00-0x0B), representing a Zone Valve or an Electric Heat zone.