TypeError: undefined is not an object (evaluating '_BleModule.BleModule.createClient')

I’m new to this library and whole react-native. I’ve done all steps written in this site successfully (It’s the same as the steps in README.md file). To test this library, I used the code in the polidea site (this Link) but faced this error on my Android device (I’m working with a real device):

TypeError: undefined is not an object (evaluating ‘_BleModule.BleModule.createClient’) This error is located at: in SensorsComponent (at renderApplication.js:33) in RCTView (at View.js:60) in View (at AppContainer.js:102) in RCTView (at View.js:60) in View (at AppContainer.js:122) in AppContainer (at renderApplication.js:32)

This is my build.gradle file:

apply plugin: "com.android.application"
import com.android.build.OutputFile
project.ext.react = [
    entryFile: "index.js"
]
apply from: "../../node_modules/react-native/react.gradle"
def enableSeparateBuildPerCPUArchitecture = false
def enableProguardInReleaseBuilds = false
android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"
    defaultConfig {
        applicationId "com.roboctl"
        minSdkVersion 18
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"
        ndk {
            abiFilters "armeabi-v7a", "x86"
        }
    }
    splits {
        abi {
            reset()
            enable enableSeparateBuildPerCPUArchitecture
            universalApk false  // If true, also generate a universal APK
            include "armeabi-v7a", "x86"
        }
    }
    buildTypes {
        release {
            minifyEnabled enableProguardInReleaseBuilds
            proguardFiles getDefaultProguardFile("proguard-android.txt"), "proguard-rules.pro"
        }
    }
    // applicationVariants are e.g. debug, release
    applicationVariants.all { variant ->
        variant.outputs.each { output ->
             // For each separate APK per architecture, set a unique version code as described here:
            // http://tools.android.com/tech-docs/new-build-system/user-guide/apk-splits
            def versionCodes = ["armeabi-v7a":1, "x86":2]
            def abi = output.getFilter(OutputFile.ABI)
            if (abi != null) {  // null for the universal-debug, universal-release variants
                output.versionCodeOverride =
                        versionCodes.get(abi) * 1048576 + defaultConfig.versionCode
            }
        }
    }
}
dependencies {
    compile fileTree(dir: "libs", include: ["*.jar"])
    compile "com.android.support:appcompat-v7:23.0.1"
    compile "com.facebook.react:react-native:+"  // From node_modules
}

// Run this once to be able to run the application with BUCK
// puts all compile dependencies into folder libs for BUCK to use
task copyDownloadableDepsToLibs(type: Copy) {
    from configurations.compile
    into 'libs'
}

This is my AndroidManifest.xml file:

`<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.roboctl">

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/>
<uses-permission-sdk-23 android:name="android.permission.ACCESS_COARSE_LOCATION"/>

<!-- Add this line if your application always requires BLE. More info can be found on:
     https://developer.android.com/guide/topics/connectivity/bluetooth-le.html#permissions
  -->
<uses-feature android:name="android.hardware.bluetooth_le" android:required="true"/>

<uses-sdk
    android:minSdkVersion="18"/>

<application
  android:name=".MainApplication"
  android:label="@string/app_name"
  android:icon="@mipmap/ic_launcher"
  android:allowBackup="false"
  android:theme="@style/AppTheme">
  <activity
    android:name=".MainActivity"
    android:label="@string/app_name"
    android:configChanges="keyboard|keyboardHidden|orientation|screenSize"
    android:windowSoftInputMode="adjustResize">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />
        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
  </activity>
  <activity android:name="com.facebook.react.devsupport.DevSettingsActivity" />
</application>

</manifest>`

This is my MainApplication.java file:

package com.roboctl;

import android.app.Application;

import com.facebook.react.ReactApplication;
import com.facebook.react.ReactNativeHost;
import com.facebook.react.ReactPackage;
import com.facebook.react.shell.MainReactPackage;
import com.facebook.soloader.SoLoader;

import java.util.Arrays;
import java.util.List;

public class MainApplication extends Application implements ReactApplication {

  private final ReactNativeHost mReactNativeHost = new ReactNativeHost(this) {
    @Override
    public boolean getUseDeveloperSupport() {
      return BuildConfig.DEBUG;
    }

    @Override
    protected List<ReactPackage> getPackages() {
      return Arrays.<ReactPackage>asList(
          new MainReactPackage()
      );
    }

    @Override
    protected String getJSMainModuleName() {
      return "index";
    }
  };

  @Override
  public ReactNativeHost getReactNativeHost() {
    return mReactNativeHost;
  }

  @Override
  public void onCreate() {
    super.onCreate();
    SoLoader.init(this, /* native exopackage */ false);
  }
}

How to solve this problem? None of the solutions in the google search was my case.

[mahdieh-dev]

Just hadn’t done steps 4 to 6 of the manual setup of react-native-ble-plx. refer to this link.

[zumi2013]

Just hadn’t done steps 4 to 6 of the manual setup of react-native-ble-plx. refer to this link.

@mshavandi How to do that last step Troubleshooting Problems with Proguard?