idempotence zapisu 178 a 179 grid peak shaveing a grid cuttoff

backend/services/control/exporter_monolith.py

@@ -332,9 +332,18 @@ def _drop_registers_matching_last_verified(
     skipped: list[int] = []
     for reg, meta, val in registers:
         lv = last_verified.get(int(reg))
-        if lv is not None and lv == int(val):
-            skipped.append(int(reg))
-            continue
+        if lv is not None:
+            # reg178: porovnáváme jen masku bitů 4–5 (Deye si v dalších bitech drží vlastní stav).
+            if int(reg) == 178 and _deye_reg178_verify_match(int(val), int(lv)):
+                skipped.append(int(reg))
+                continue
+            # reg179: porovnáváme jen bits0–1 maskou 0x0003 (masked RMW zachovává ostatní bity).
+            if int(reg) == 179 and _deye_reg179_verify_match(int(val), int(lv)):
+                skipped.append(int(reg))
+                continue
+            if int(lv) == int(val):
+                skipped.append(int(reg))
+                continue
         out.append((reg, meta, val))
     return out, skipped
 

backend/tests/test_drop_registers_matching_last_verified.py

@@ -0,0 +1,38 @@
+from services.control.exporter_monolith import (
+    REG178_PASSIVE,
+    _drop_registers_matching_last_verified,
+)
+
+
+def test_drop_registers_skips_reg178_when_mask_matches():
+    # last_verified contains extra bits beyond 0x0030; we still want to skip if bits 4–5 match.
+    registers = [(178, "grid_peak_shaving_switch", REG178_PASSIVE)]
+    last_verified = {178: 12030}  # real-world example from home-01 (bits4-5 still == 0b11)
+    out, skipped = _drop_registers_matching_last_verified(registers, last_verified)
+    assert out == []
+    assert skipped == [178]
+
+
+def test_drop_registers_keeps_reg178_when_mask_differs():
+    registers = [(178, "grid_peak_shaving_switch", REG178_PASSIVE)]
+    last_verified = {178: 32}  # SELL mask 0b10
+    out, skipped = _drop_registers_matching_last_verified(registers, last_verified)
+    assert out == registers
+    assert skipped == []
+
+
+def test_drop_registers_skips_reg179_when_mask_matches():
+    registers = [(179, "control_board_special_1", 2)]  # bits0–1 = 2 (cutoff ON)
+    last_verified = {179: 0x1236}  # ...0110b => bits0–1 still == 2
+    out, skipped = _drop_registers_matching_last_verified(registers, last_verified)
+    assert out == []
+    assert skipped == [179]
+
+
+def test_drop_registers_keeps_reg179_when_mask_differs():
+    registers = [(179, "control_board_special_1", 2)]  # want cutoff ON
+    last_verified = {179: 0x1237}  # ...0111b => bits0–1 == 3 (cutoff OFF)
+    out, skipped = _drop_registers_matching_last_verified(registers, last_verified)
+    assert out == registers
+    assert skipped == []
+