Expose Time of Use as per-bit switches instead of a select

Register 146 is a bit map (bit 0 enable, bits 1-7 Monday..Sunday), so a select
over whole-register values could not represent every combination: an inverter
with TOU enabled and no day bits reads 1, matched no option and left the entity
blank, hiding that TOU was active. Each bit is now its own switch, written with
the coordinator's read-modify-write so the other bits survive.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: rusty-bit

CHANGELOG.md

@@ -1,5 +1,13 @@
 # Changelog (personal fork)
 
+## 0.1.8
+- Fix: Time of Use (register 146) is a bit map - bit 0 enables it, bits 1-7 are the
+  weekdays - not an enumeration. The old `Time of Use` select listed whole-register
+  values, so an inverter with TOU on and no day bits (146 = 1) matched nothing and the
+  entity stayed blank. It is replaced by a `Time of Use` switch plus one switch per day
+  (disabled by default); each writes only its own bit, leaving the others untouched.
+  The old `time_of_use_days` select is gone - delete the stale entity in Home Assistant.
+
 ## 0.1.7
 - Change: "Battery Shutdown SOC" and "Battery Low SOC" are now named
   "Battery Shutdown SOC (cutoff)" (register 115) and "Battery Low SOC (warning)"

README.md

@@ -133,6 +133,8 @@ Rebadged units on the same platform (Sunsynk, etc.) will generally work too.
 |------|----------|
 | Switch | Inverter On/Off, Solar Sell (Export), Grid Charge Enable, Generator Charge Enable |
 | Select | Work Mode (Selling First / Zero Export To Load / Zero Export To CT) |
+> **Time of Use.** Register 146 is a bit map: the **Time of Use** switch is bit 0 and the seven day switches (disabled by default) are bits 1-7. Each writes only its own bit.
+
 > **SOC settings.** While Time of Use is enabled (register 146), the inverter discharges only to the active slot's **TOU SOC**, not to *Battery Low SOC (warning)* — that one is the warning level, and *Battery Shutdown SOC (cutoff)* is the real cutoff. The TOU SOC entities ship disabled; enable them to change the floor.
 
 | Number | Max Sell Power, Max Grid Output Power, Active Power Regulation, Battery Max Charge/Discharge Current, Grid Charge Current, Battery Shutdown/Restart/Low SOC, Battery Capacity, Grid Voltage High/Low limits |

custom_components/deye_modbus/manifest.json

@@ -16,5 +16,5 @@
   "requirements": [
     "pymodbus>=3.5.0"
   ],
-  "version": "0.1.7"
+  "version": "0.1.8"
 }

custom_components/deye_modbus/maps/sun_3ph_hybrid.yaml

@@ -1597,39 +1597,98 @@ controls:
       - label: Load First
         value: 1
 
-  - type: select
+  # Register 146 is a bit map, not an enumeration: bit 0 enables Time of Use and
+  # bits 1-7 are Monday..Sunday. A select over whole-register values cannot show
+  # combinations the list does not contain (an inverter with TOU on and no day
+  # bits reads 1 and left the entity blank), so each bit gets its own switch and
+  # the write is a read-modify-write that leaves the other bits alone.
+  - type: switch
     name: Time of Use
-    unique_id: time_of_use_days
+    unique_id: time_of_use_enable
     group: Time of Use
     register_type: holding
     address: 146
+    bit: 0
     icon: mdi:calendar-clock
     entity_category: config
-    options:
-      - label: Disabled
-        value: 0
-      - label: Every day
-        value: 255
-      - label: Weekdays
-        value: 63
-      - label: Weekend
-        value: 193
-      - label: Monday
-        value: 3
-      - label: Tuesday
-        value: 5
-      - label: Wednesday
-        value: 9
-      - label: Thursday
-        value: 17
-      - label: Friday
-        value: 33
-      - label: Saturday
-        value: 65
-      - label: Sunday
-        value: 129
-
-  # ------------------------------------------------------ Battery Setting page
+
+  - type: switch
+    name: Time of Use Monday
+    unique_id: tou_day_monday
+    group: Time of Use
+    register_type: holding
+    address: 146
+    bit: 1
+    icon: mdi:calendar
+    entity_category: config
+    enabled_default: false
+
+  - type: switch
+    name: Time of Use Tuesday
+    unique_id: tou_day_tuesday
+    group: Time of Use
+    register_type: holding
+    address: 146
+    bit: 2
+    icon: mdi:calendar
+    entity_category: config
+    enabled_default: false
+
+  - type: switch
+    name: Time of Use Wednesday
+    unique_id: tou_day_wednesday
+    group: Time of Use
+    register_type: holding
+    address: 146
+    bit: 3
+    icon: mdi:calendar
+    entity_category: config
+    enabled_default: false
+
+  - type: switch
+    name: Time of Use Thursday
+    unique_id: tou_day_thursday
+    group: Time of Use
+    register_type: holding
+    address: 146
+    bit: 4
+    icon: mdi:calendar
+    entity_category: config
+    enabled_default: false
+
+  - type: switch
+    name: Time of Use Friday
+    unique_id: tou_day_friday
+    group: Time of Use
+    register_type: holding
+    address: 146
+    bit: 5
+    icon: mdi:calendar
+    entity_category: config
+    enabled_default: false
+
+  - type: switch
+    name: Time of Use Saturday
+    unique_id: tou_day_saturday
+    group: Time of Use
+    register_type: holding
+    address: 146
+    bit: 6
+    icon: mdi:calendar
+    entity_category: config
+    enabled_default: false
+
+  - type: switch
+    name: Time of Use Sunday
+    unique_id: tou_day_sunday
+    group: Time of Use
+    register_type: holding
+    address: 146
+    bit: 7
+    icon: mdi:calendar
+    entity_category: config
+    enabled_default: false
+
   - type: select
     name: Battery Control Mode
     unique_id: batt_control_mode