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+# HS2S Workflow
+
+## import HS2S module
+
+```js
+import {
+  HS2SModule,
+  HS2SProfileModule
+} from '@ihealth/ihealthlibrary-react-native';
+```
+
+## APIs
+
+### add and remove listener
+
+```js
+// add
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    console.log(event);
+});
+
+// remove
+notifyListener.remove();
+```
+
+### get device information
+
+```js
+HS2SModule.getDeviceInfo(mac);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === "action_get_device_info") {
+       console.log(event["battery"]);
+       console.log(event["unit_current"]);
+       console.log(event["user_count"]);
+    }
+}
+```
+
+### get device battery
+
+```js
+HS2SModule.getBattery(mac);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === "action_get_battery_hs") {
+       console.log(event["battery_hs"]);
+    }
+}
+```
+
+### set Unit
+
+```js
+HS2SModule.setUnit(mac);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === "action_set_unit") {
+       console.log(event["result"]);
+    }
+}
+```
+
+### get user information
+
+```js
+HS2SModule.getUserInfo(mac);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === "action_get_user_info") {
+       console.log(event["user_info-count"]);
+       let array = event["user_info_array"];
+       console.log(array["body_building"]);
+       console.log(array["impedance"]);
+       console.log(array["height"]);
+       console.log(array["age"]);
+       console.log(array["gender"]);
+       console.log(array["weight"]);
+       console.log(array["create_time"]);
+       console.log(array["user_id"]);
+    }
+}
+```
+
+### create user
+
+```js
+HS2SModule.updateUserInfo(mac);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === "action_create_or_update_user_info") {
+       console.log(event["result"]);
+    }
+}
+```
+
+### delete user
+
+```js
+HS2SModule.deleteUser(mac, userId);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === "action_delete_user_info") {
+       console.log(event["result"]);
+    }
+}
+```
+
+### get the number of offline data
+
+```js
+HS2SModule.getMemoryDataCount(mac, userId);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === "action_history_data_num") {
+       console.log(event["history_data_count"]);
+    }
+}
+```
+
+### get offline data
+
+```js
+HS2SModule.getMemoryData(mac, userId);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === "action_history_data") {
+        let arr = event["history_data"];
+        arr.forEach(function(result) {
+            console.log(result["fat_weight"]);
+            console.log(result["fat_control"];
+            console.log(result["weight_control"];
+            console.log(result["standard_weight"];
+            console.log(result["skeletal_muscle_mass"];
+            console.log(result["body_water_rate"];
+            console.log(result["muscle_mas"];
+            console.log(result["instruction_type"];
+            console.log(result["body_building"];
+            console.log(result["height"];
+            console.log(result["gender"];
+            console.log(result["muscle_control"];
+            console.log(result["physical_age"];
+            console.log(result["visceral_fat_grade"];
+            console.log(result["protein_rate"];
+            console.log(result["bone_salt_content"];
+            console.log(result["visceral_fat_grade"];
+            console.log(result["measure_time"];
+            console.log(result["age"];
+            console.log(result["impedance"];
+            console.log(result["weight"];
+       })
+    }
+}
+```
+
+### delete offline data by user id
+
+```js
+HS2SModule.deleteMemoryData(mac, userId);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === "action_delete_history_data") {
+       console.log(event["result"]);
+    }
+}
+```
+
+### get the number of anonymous offline data
+
+```js
+HS2SModule.getAnonymousMemoryDataCount(mac);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === "action_anonymous_data_num") {
+       console.log(event["anonymous_data_count"]);
+    }
+}
+```
+
+### get anonymous offline data
+
+```js
+HS2SModule.getAnonymousMemoryData(mac);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === "action_anonymous_data") {
+        let arr = event["history_data"];
+        arr.forEach(function(result) {
+            console.log(result["instruction_type"];
+            console.log(result["body_building"];
+            console.log(result["height"];
+            console.log(result["gender"];
+            console.log(result["measure_time"];
+            console.log(result["age"];
+            console.log(result["impedance"];
+            console.log(result["weight"];
+       })
+    }
+}
+```
+
+### delete anonymous offline data
+
+```js
+HS2SModule.deleteAnonymousMemoryData(mac);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === "action_delete_anonymous_data") {
+       console.log(event["result"]);
+    }
+}
+```
+
+### start a online measurement
+
+The API is asyn function. It will return message until finish measurement.
+
+```js
+HS2SModule.measure(mac);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === "action_specify_users") {
+        console.log(event["result"]);
+        // 1: success, 0: failure
+
+    } else if (event.action === "action_online_real_time_weight") {
+        console.log(event["weight"]);
+
+    } else if (event.action === "action_online_result") {
+        console.log(event["weight"]);
+
+    } else if (event.action === "action_body_fat_result") {
+        let bodyFat = event["data_body_fat_result"];
+        let fat_weight = bodyFat["fat_weight"];
+        let fat_control = bodyFat["fat_control"];
+        let weight_control = bodyFat["weight_control"];
+        let standard_weight = bodyFat["standard_weight"];
+        let skeletal_muscle_mass = bodyFat["skeletal_muscle_mass"];
+        let body_water_rate = bodyFat["body_water_rate"];
+        let muscle_mas = bodyFat["muscle_mas"];
+        let instruction_type = bodyFat["instruction_type"];
+        let body_building = bodyFat["body_building"];
+        let height = bodyFat["height"];
+        let gender = bodyFat["gender"];
+        let muscle_control = bodyFat["muscle_control"];
+        let physical_age = bodyFat["physical_age"];
+        let visceral_fat_grade = bodyFat["visceral_fat_grade"];
+        let protein_rate = bodyFat["protein_rate"];
+        let bone_salt_content = bodyFat["bone_salt_content"];
+        let visceral_fat_grade = bodyFat["visceral_fat_grade"];
+        let measure_time = bodyFat["measure_time"];
+        let age = bodyFat["age"];
+        let impedance = bodyFat["impedance"];
+        let weight = bodyFat["weight"];
+
+    } else if (event.action === "action_measure_finish_at_critical") { }
+});
+```
+
+### start heart rate measurement mode
+
+```js
+HS2SModule.resetDevice(mac);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === HS2SProfileModule.ACTION_HS2S_MEASURE_HEARTRATE) {
+       
+    }
+}
+```
+
+### stop heart rate measurement mode
+
+```js
+HS2SModule.resetDevice(mac);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === HS2SProfileModule.ACTION_HS2S_EXIT_MEASURE_HEARTRATE_STATUS) {
+        // {"status":0,"heartrate":78}
+       console.log(event.message);
+    }
+}
+```
+
+### reset device
+
+```js
+HS2SModule.resetDevice(mac);
+
+notifyListener = DeviceEventEmitter.addListener(HS2SModule.Event_Notify,  (event) => {
+    if (event.action === "action_restore_factory_settings") {
+       console.log(event["result"]);
+    }
+}
+```
+
+### disconnect device
+
+```js
+HS2SModule.disConnect(mac);
+```
+
+### get all connected devices
+
+```js
+HS2SModule.getAllConnectedDevices();
+```