This is demo solution, KinCony H32B Pro relay controller work with KNX system. 8 gang switch panel is KNX type.
KinCony H32B Pro / H32BS relay controller RS485 command list:
send: Turn ON Relay1:01 05 00 00 FF 00 8C 3A receive:01 05 00 00 FF 00 8C 3A
send: Turn ON Relay2:01 05 00 01 FF 00 DD FA receive:01 05 00 01 FF 00 DD FA
send: Turn ON Relay3:01 05 00 02 FF 00 2D FA receive:01 05 00 02 FF 00 2D FA
send: Turn ON Relay4:01 05 00 03 FF 00 7C 3A receive:01 05 00 03 FF 00 7C 3A
send: Turn ON Relay5:01 05 00 04 FF 00 CD FB receive:01 05 00 04 FF 00 CD FB
send: Turn ON Relay6:01 05 00 05 FF 00 9C 3B receive:01 05 00 05 FF 00 9C 3B
send: Turn ON Relay7:01 05 00 06 FF 00 6C 3B receive:01 05 00 06 FF 00 6C 3B
send: Turn ON Relay8:01 05 00 07 FF 00 3D FB receive:01 05 00 07 FF 00 3D FB
send: Turn ON Relay9:01 05 00 08 FF 00 0D F8 receive:01 05 00 08 FF 00 0D F8
send: Turn ON Relay10:01 05 00 09 FF 00 5C 38 receive:01 05 00 09 FF 00 5C 38
send: Turn ON Relay11:01 05 00 0A FF 00 AC 38 receive:01 05 00 0A FF 00 AC 38
send: Turn ON Relay12:01 05 00 0B FF 00 FD F8 receive:01 05 00 0B FF 00 FD F8
send: Turn ON Relay13:01 05 00 0C FF 00 4C 39 receive:01 05 00 0C FF 00 4C 39
send: Turn ON Relay14:01 05 00 0D FF 00 1D F9 receive:01 05 00 0D FF 00 1D F9
send: Turn ON Relay15:01 05 00 0E FF 00 ED F9 receive:01 05 00 0E FF 00 ED F9
send: Turn ON Relay16:01 05 00 0F FF 00 BC 39 receive:01 05 00 0F FF 00 BC 39
send: Turn ON Relay17:01 05 00 10 FF 00 8D FF receive:01 05 00 10 FF 00 8D FF
send: Turn ON Relay18:01 05 00 11 FF 00 DC 3F receive:01 05 00 11 FF 00 DC 3F
send: Turn ON Relay19:01 05 00 12 FF 00 2C 3F receive:01 05 00 12 FF 00 2C 3F
send: Turn ON Relay20:01 05 00 13 FF 00 7D FF receive:01 05 00 13 FF 00 7D FF
send: Turn ON Relay21:01 05 00 14 FF 00 CC 3E receive:01 05 00 14 FF 00 CC 3E
send: Turn ON Relay22:01 05 00 15 FF 00 9D FE receive:01 05 00 15 FF 00 9D FE
send: Turn ON Relay23:01 05 00 16 FF 00 6D FE receive:01 05 00 16 FF 00 6D FE
send: Turn ON Relay24:01 05 00 17 FF 00 3C 3E receive:01 05 00 17 FF 00 3C 3E
send: Turn ON Relay25:01 05 00 18 FF 00 0C 3D receive:01 05 00 18 FF 00 0C 3D
send: Turn ON Relay26:01 05 00 19 FF 00 5D FD receive:01 05 00 19 FF 00 5D FD
send: Turn ON Relay27:01 05 00 1A FF 00 AD FD receive:01 05 00 1A FF 00 AD FD
send: Turn ON Relay28:01 05 00 1B FF 00 FC 3D receive:01 05 00 1B FF 00 FC 3D
send: Turn ON Relay29:01 05 00 1C FF 00 4D FC receive:01 05 00 1C FF 00 4D FC
send: Turn ON Relay30:01 05 00 1D FF 00 1C 3C receive:01 05 00 1D FF 00 1C 3C
send: Turn ON Relay31:01 05 00 1E FF 00 EC 3C receive:01 05 00 1E FF 00 EC 3C
send: Turn ON Relay32:01 05 00 1F FF 00 BD FC receive:01 05 00 1F FF 00 BD FC
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send: Turn OFF Relay1:01 05 00 00 00 00 CD CA receive:01 05 00 00 00 00 CD CA
send: Turn OFF Relay2:01 05 00 01 00 00 9C 0A receive:01 05 00 01 00 00 9C 0A
send: Turn OFF Relay3:01 05 00 02 00 00 6C 0A receive:01 05 00 02 00 00 6C 0A
send: Turn OFF Relay4:01 05 00 03 00 00 3D CA receive:01 05 00 03 00 00 3D CA
send: Turn OFF Relay5:01 05 00 04 00 00 8C 0B receive:01 05 00 04 00 00 8C 0B
send: Turn OFF Relay6:01 05 00 05 00 00 DD CB receive:01 05 00 05 00 00 DD CB
send: Turn OFF Relay7:01 05 00 06 00 00 2D CB receive:01 05 00 06 00 00 2D CB
send: Turn OFF Relay8:01 05 00 07 00 00 7C 0B receive:01 05 00 07 00 00 7C 0B
send: Turn OFF Relay9:01 05 00 08 00 00 4C 08 receive:01 05 00 08 00 00 4C 08
send: Turn OFF Relay10:01 05 00 09 00 00 1D C8 receive:01 05 00 09 00 00 1D C8
send: Turn OFF Relay11:01 05 00 0A 00 00 ED C8 receive:01 05 00 0A 00 00 ED C8
send: Turn OFF Relay12:01 05 00 0B 00 00 BC 08 receive:01 05 00 0B 00 00 BC 08
send: Turn OFF Relay13:01 05 00 0C 00 00 0D C9 receive:01 05 00 0C 00 00 0D C9
send: Turn OFF Relay14:01 05 00 0D 00 00 5C 09 receive:01 05 00 0D 00 00 5C 09
send: Turn OFF Relay15:01 05 00 0E 00 00 AC 09 receive:01 05 00 0E 00 00 AC 09
send: Turn OFF Relay16:01 05 00 0F 00 00 FD C9 receive:01 05 00 0F 00 00 FD C9
send: Turn OFF Relay17:01 05 00 10 00 00 CC 0F receive:01 05 00 10 00 00 CC 0F
send: Turn OFF Relay18:01 05 00 11 00 00 9D CF receive:01 05 00 11 00 00 9D CF
send: Turn OFF Relay19:01 05 00 12 00 00 6D CF receive:01 05 00 12 00 00 6D CF
send: Turn OFF Relay20:01 05 00 13 00 00 3C 0F receive:01 05 00 13 00 00 3C 0F
send: Turn OFF Relay21:01 05 00 14 00 00 8D CE receive:01 05 00 14 00 00 8D CE
send: Turn OFF Relay22:01 05 00 15 00 00 DC 0E receive:01 05 00 15 00 00 DC 0E
send: Turn OFF Relay23:01 05 00 16 00 00 2C 0E receive:01 05 00 16 00 00 2C 0E
send: Turn OFF Relay24:01 05 00 17 00 00 7D CE receive:01 05 00 17 00 00 7D CE
send: Turn OFF Relay25:01 05 00 18 00 00 4D CD receive:01 05 00 18 00 00 4D CD
send: Turn OFF Relay26:01 05 00 19 00 00 1C 0D receive:01 05 00 19 00 00 1C 0D
send: Turn OFF Relay27:01 05 00 1A 00 00 EC 0D receive:01 05 00 1A 00 00 EC 0D
send: Turn OFF Relay28:01 05 00 1B 00 00 BD CD receive:01 05 00 1B 00 00 BD CD
send: Turn OFF Relay29:01 05 00 1C 00 00 0C 0C receive:01 05 00 1C 00 00 0C 0C
send: Turn OFF Relay30:01 05 00 1D 00 00 5D CC receive:01 05 00 1D 00 00 5D CC
send: Turn OFF Relay31:01 05 00 1E 00 00 AD CC receive:01 05 00 1E 00 00 AD CC
send: Turn OFF Relay32:01 05 00 1F 00 00 FC 0C receive:01 05 00 1F 00 00 FC 0C
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ALL ON:
send:01 0F 00 00 00 20 04 FF FF FF FF C5 1C receive:01 0F 00 00 00 20 54 13
ALL OFF:
send:01 0F 00 00 00 20 04 00 00 00 00 C4 88 receive:01 0F 00 00 00 20 54 13