Fix I_Status and I_Status_Vendor register type: uint16 not int16#985
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WillCodeForCats merged 2 commits intoMay 24, 2026
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SunSpec Implementation Technical Note v3.2 (June 2025) defines: 40107 I_Status uint16 Operating State 40108 I_Status_Vendor uint16 Vendor-defined operating state/error codes Both registers were being decoded as int16, which is incorrect per spec. The not-implemented sentinel for uint16 is 0xFFFF (SunSpecNotImpl.UINT16), not 0x8000 (SunSpecNotImpl.INT16) used for signed registers. For I_Status values 1-8 the decoded value is identical under either type. For I_Status_Vendor the distinction matters: vendor-defined error codes are unsigned and a code of 0x8000 would be misread as not-implemented if decoded as int16. The spec notes I_Status_Vendor applies to firmware <= 3.19.xx; I_Status_Vendor4 (uint32) applies to firmware >= 3.20.xx. Verified against: SolarEdge SunSpec Implementation Technical Note v3.2 Table: Inverter Model MODBUS Register Map, addresses 40107-40108
…Vendor Following the register type correction in the previous commit, the not-implemented checks that guard I_Status and I_Status_Vendor must use SunSpecNotImpl.UINT16 (0xFFFF) instead of SunSpecNotImpl.INT16 (0x8000). Without this change, after decoding I_Status_Vendor as uint16, the guard in native_value would never match on 0xFFFF, allowing an unrecognised value to fall through to the DEVICE_STATUS dict lookup and raise a KeyError. Also updates VENDOR_STATUS in const.py: the not-implemented sentinel key changes from SunSpecNotImpl.INT16 to SunSpecNotImpl.UINT16 to match.
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Summary
I_Status(address 40107) andI_Status_Vendor(address 40108) are decoded asint16in hub.py but are defined asuint16in the SolarEdge SunSpec Implementation Technical Note.Spec reference
See SolarEdge Sunspec Implementation Technical Note v3.2 (June 2025) shows both registers typed as
uint16below:Changes
hub.py: Move
I_StatusandI_Status_Vendorfrom theint16decode list to theuint16decode list.sensor.py + const.py: Update the not-implemented sentinel checks in
SolarEdgeInverterStatus.native_valueandStatusVendor.native_valuefromSunSpecNotImpl.INT16toSunSpecNotImpl.UINT16. Also updates theVENDOR_STATUSdict key inconst.pyto match.Testing
Tested on SE7600, firmware
0003.2537(≥ 3.20.xx), single inverter.Integration loaded cleanly,
I_Statusdecoded correctly(status 4, Production), no errors in logs.