feat: Support frost_protection_temperature for SONOFF TRVZB (#6425)

* feat: add support for Sonoff TRV frost protection

* refactor: moved frost protection into local Sonoff expose

* chore: reword description

src/devices/sonoff.ts

@@ -3,6 +3,7 @@ import fz from '../converters/fromZigbee';
 import tz from '../converters/toZigbee';
 import * as constants from '../lib/constants';
 import * as reporting from '../lib/reporting';
+import * as utils from '../lib/utils';
 import extend from '../lib/extend';
 import {Zcl} from 'zigbee-herdsman';
 import {Definition, Fz, KeyValue, KeyValueAny, Tz} from '../lib/types';
@@ -47,6 +48,20 @@ const fzLocal = {
                 result.open_window = data[0x6000] ? 'ON' : 'OFF';
             }
 
+            return result;
+        },
+    } as Fz.Converter,
+    frost_protection_temperature: {
+        cluster: '64529',
+        type: ['attributeReport', 'readResponse'],
+        convert: (model, msg, publish, options, meta) => {
+            const result: KeyValueAny = {};
+            const data = msg.data;
+
+            if (data.hasOwnProperty(0x6002)) {
+                result.frost_protection_temperature = data[0x6002] / 100;
+            }
+
             return result;
         },
     } as Fz.Converter,
@@ -81,6 +96,20 @@ const tzLocal = {
             };
         },
     } as Tz.Converter,
+    frost_protection_temperature: {
+        key: ['frost_protection_temperature'],
+        convertGet: async (entity, key, meta) => {
+            await entity.read(0xFC11, [0x6002]);
+        },
+        convertSet: async (entity, key, value, meta) => {
+            await entity.write(0xFC11, {0x6002: {value: utils.toNumber(value) * 100, type: Zcl.DataType.int16}});
+            return {
+                state: {
+                    [key]: value,
+                },
+            };
+        },
+    } as Tz.Converter,
 };
 
 const definitions: Definition[] = [
@@ -413,19 +442,26 @@ const definitions: Definition[] = [
                 .withLabel('Open window detection')
                 .withDescription('Automatically turns off the radiator when local temperature drops by more than 1.5°C in 4.5 minutes.')
                 .withAccess(ea.ALL),
+            e.numeric('frost_protection_temperature', ea.ALL)
+                .withValueMin(4.0)
+                .withValueMax(35.0)
+                .withValueStep(0.5)
+                .withUnit('°C')
+                .withDescription(
+                    'Minimum temperature at which to automatically turn on the radiator, if system mode is off, to prevent pipes freezing.'),
         ],
-        fromZigbee: [fz.thermostat, fz.battery, fzLocal.child_lock, fzLocal.open_window],
+        fromZigbee: [fz.thermostat, fz.battery, fzLocal.child_lock, fzLocal.open_window, fzLocal.frost_protection_temperature],
         toZigbee: [
             tz.thermostat_local_temperature, tz.thermostat_local_temperature_calibration, tz.thermostat_occupied_heating_setpoint,
-            tz.thermostat_system_mode, tz.thermostat_running_state, tzLocal.child_lock, tzLocal.open_window],
+            tz.thermostat_system_mode, tz.thermostat_running_state, tzLocal.child_lock, tzLocal.open_window, tzLocal.frost_protection_temperature],
         configure: async (device, coordinatorEndpoint, logger) => {
             const endpoint = device.getEndpoint(1);
             await reporting.bind(endpoint, coordinatorEndpoint, ['hvacThermostat']);
             await reporting.thermostatTemperature(endpoint);
             await reporting.thermostatOccupiedHeatingSetpoint(endpoint);
             await reporting.thermostatSystemMode(endpoint);
             await endpoint.read('hvacThermostat', ['localTemperatureCalibration']);
-            await endpoint.read(64529, [0x0000, 0x6000]);
+            await endpoint.read(0xFC11, [0x0000, 0x6000, 0x6002]);
         },
     },
 ];