From 73cef9e62a3e316254e35bcd10a459facd7d5332 Mon Sep 17 00:00:00 2001 From: Nicolas Raynaud Date: Thu, 6 Aug 2026 19:31:43 +0200 Subject: [PATCH 1/2] Add byte 8 of 0xCD "tonnage" I badgered google's slop machine to propose a Lookup table for the power of the units based on the examples found in the wiki and in a github issue. --- .../0xCD-unknown-identify-packet.md | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/docs/developer/it-protocol/0x7B-identify-response/0xCD-unknown-identify-packet.md b/docs/developer/it-protocol/0x7B-identify-response/0xCD-unknown-identify-packet.md index 9f2d916..9e70267 100644 --- a/docs/developer/it-protocol/0x7B-identify-response/0xCD-unknown-identify-packet.md +++ b/docs/developer/it-protocol/0x7B-identify-response/0xCD-unknown-identify-packet.md @@ -10,8 +10,22 @@ The exact purpose of this packet and when (if at all) it's sent in the field is | Byte | Purpose | Possible Values | Supported by mUART | Notes | |------|-------------------|-----------------|--------------------|-------| | 0 | CommandType | 0xCD | | | +| 1-7 | Unknown | 0x03 | | | +| 8 | Tonnage? | 0x03 | | | | 1-15 | Unknown | 0x03 | | | +## Byte 8 Tonnage + +| Hex Flag (Byte 8) | Metric Capacity Class | Equivalent BTU Tonnage | Common Model Match Examples | +| :--- | :--- | :--- | :--- | +| **`0x00`** | 1.5 kW | ~5,000 BTU (0.42 Tons) | MSZ-AP15VGK, MSZ-EF15VG | +| **`0x01`** | 1.8 kW | ~6,000 BTU (0.50 Tons) | MSZ-AP18VGK | +| **`0x02`** | 2.0 kW | ~7,000 BTU (0.58 Tons) | MSZ-AP20VG, MSZ-LN20VG | +| **`0x03`** | 2.5 kW | ~9,000 BTU (0.75 Tons) | MSZ-AP25VG, MSZ-LN25VG, MSZ-EF25VG | +| **`0x04`** | 3.5 kW | ~12,000 BTU (1.00 Ton) | MSZ-AP35VG, MSZ-LN35VG, MSZ-EF35VG | +| **`0x05`** | 4.2 kW | ~15,000 BTU (1.25 Tons) | MSZ-AP42VG | +| **`0x06`** | 5.0 kW | ~18,000 BTU (1.50 Tons) | MSZ-AP50VG, MSZ-LN50VG | + ### Sample Packets ``` From a224b31fba731d121d939b8bc887851f19c5c510 Mon Sep 17 00:00:00 2001 From: Nicolas Raynaud Date: Thu, 6 Aug 2026 19:45:13 +0200 Subject: [PATCH 2/2] Update 0xCD tonnage fix byte address --- .../0xCD-unknown-identify-packet.md | 36 +++++++++---------- 1 file changed, 18 insertions(+), 18 deletions(-) diff --git a/docs/developer/it-protocol/0x7B-identify-response/0xCD-unknown-identify-packet.md b/docs/developer/it-protocol/0x7B-identify-response/0xCD-unknown-identify-packet.md index 9e70267..cef89a6 100644 --- a/docs/developer/it-protocol/0x7B-identify-response/0xCD-unknown-identify-packet.md +++ b/docs/developer/it-protocol/0x7B-identify-response/0xCD-unknown-identify-packet.md @@ -7,24 +7,24 @@ The exact purpose of this packet and when (if at all) it's sent in the field is ::: -| Byte | Purpose | Possible Values | Supported by mUART | Notes | -|------|-------------------|-----------------|--------------------|-------| -| 0 | CommandType | 0xCD | | | -| 1-7 | Unknown | 0x03 | | | -| 8 | Tonnage? | 0x03 | | | -| 1-15 | Unknown | 0x03 | | | - -## Byte 8 Tonnage - -| Hex Flag (Byte 8) | Metric Capacity Class | Equivalent BTU Tonnage | Common Model Match Examples | -| :--- | :--- | :--- | :--- | -| **`0x00`** | 1.5 kW | ~5,000 BTU (0.42 Tons) | MSZ-AP15VGK, MSZ-EF15VG | -| **`0x01`** | 1.8 kW | ~6,000 BTU (0.50 Tons) | MSZ-AP18VGK | -| **`0x02`** | 2.0 kW | ~7,000 BTU (0.58 Tons) | MSZ-AP20VG, MSZ-LN20VG | -| **`0x03`** | 2.5 kW | ~9,000 BTU (0.75 Tons) | MSZ-AP25VG, MSZ-LN25VG, MSZ-EF25VG | -| **`0x04`** | 3.5 kW | ~12,000 BTU (1.00 Ton) | MSZ-AP35VG, MSZ-LN35VG, MSZ-EF35VG | -| **`0x05`** | 4.2 kW | ~15,000 BTU (1.25 Tons) | MSZ-AP42VG | -| **`0x06`** | 5.0 kW | ~18,000 BTU (1.50 Tons) | MSZ-AP50VG, MSZ-LN50VG | +| Byte | Purpose | Possible Values | Supported by mUART | Notes | +|-------|-------------------|-----------------|--------------------|-------| +| 0 | CommandType | 0xCD | | | +| 1-8 | Unknown | 0x03 | | | +| 9 | Tonnage? | 0x0-0x0 | | | +| 10-15 | Unknown | 0x03 | | | + +## Byte 9 Tonnage + +| Hex Flag (Byte 9) | Metric Capacity Class | Equivalent BTU Tonnage | Common Model Match Examples | +| :--- | :--- | :--- | :--- | +| **`0x00`** | 1.5 kW | ~5,000 BTU (0.42 Tons) | MSZ-AP15VGK, MSZ-EF15VG | +| **`0x01`** | 1.8 kW | ~6,000 BTU (0.50 Tons) | MSZ-AP18VGK | +| **`0x02`** | 2.0 kW | ~7,000 BTU (0.58 Tons) | MSZ-AP20VG, MSZ-LN20VG | +| **`0x03`** | 2.5 kW | ~9,000 BTU (0.75 Tons) | MSZ-AP25VG, MSZ-LN25VG, MSZ-EF25VG | +| **`0x04`** | 3.5 kW | ~12,000 BTU (1.00 Ton) | MSZ-AP35VG, MSZ-LN35VG, MSZ-EF35VG | +| **`0x05`** | 4.2 kW | ~15,000 BTU (1.25 Tons) | MSZ-AP42VG | +| **`0x06`** | 5.0 kW | ~18,000 BTU (1.50 Tons) | MSZ-AP50VG, MSZ-LN50VG | ### Sample Packets