Expo can use react-native-ble-manager?

Version

[Unhandled promise rejection: TypeError: null is not an object (evaluating 'bleManager.start')] Stack trace: http://127.0.0.1:19001/node_modules%5Cexpo%5CAppEntry.bundle?platform=android&dev=true&minify=false&hot=false:145167:21 in <unknown> node_modules\promise\setimmediate\core.js:45:7 in tryCallTwo node_modules\promise\setimmediate\core.js:200:23 in doResolve node_modules\promise\setimmediate\core.js:66:12 in Promise http://127.0.0.1:19001/node_modules%5Cexpo%5CAppEntry.bundle?platform=android&dev=true&minify=false&hot=false:145162:27 in start http://127.0.0.1:19001/node_modules%5Cexpo%5CAppEntry.bundle?platform=android&dev=true&minify=false&hot=false:144595:45 in componentDidMount node_modules\react-native\Libraries\Renderer\implementations\ReactNativeRenderer-dev.js:17029:10 in commitLifeCycles node_modules\react-native\Libraries\Renderer\implementations\ReactNativeRenderer-dev.js:20002:23 in commitLayoutEffects node_modules\react-native\Libraries\Renderer\implementations\ReactNativeRenderer-dev.js:307:15 in invokeGuardedCallbackImpl node_modules\react-native\Libraries\Renderer\implementations\ReactNativeRenderer-dev.js:531:36 in invokeGuardedCallback node_modules\react-native\Libraries\Renderer\implementations\ReactNativeRenderer-dev.js:19768:10 in commitRootImpl [native code]:null in commitRootImpl node_modules\scheduler\cjs\scheduler.development.js:643:23 in unstable_runWithPriority node_modules\react-native\Libraries\Renderer\implementations\ReactNativeRenderer-dev.js:19590:4 in commitRoot [native code]:null in commitRoot node_modules\react-native\Libraries\Renderer\implementations\ReactNativeRenderer-dev.js:18709:28 in runRootCallback [native code]:null in runRootCallback node_modules\react-native\Libraries\Renderer\implementations\ReactNativeRenderer-dev.js:5642:32 in runWithPriority$argument_1 node_modules\scheduler\cjs\scheduler.development.js:643:23 in unstable_runWithPriority node_modules\react-native\Libraries\Renderer\implementations\ReactNativeRenderer-dev.js:5638:22 in flushSyncCallbackQueueImpl node_modules\react-native\Libraries\Renderer\implementations\ReactNativeRenderer-dev.js:5627:28 in flushSyncCallbackQueue node_modules\react-native\Libraries\Renderer\implementations\ReactNativeRenderer-dev.js:18556:30 in scheduleUpdateOnFiber node_modules\react-native\Libraries\Renderer\implementations\ReactNativeRenderer-dev.js:11484:17 in dispatchAction [native code]:null in dispatchAction App.js:22:4 in loadResourcesAndDataAsync node_modules\regenerator-runtime\runtime.js:45:44 in tryCatch node_modules\regenerator-runtime\runtime.js:274:30 in invoke node_modules\regenerator-runtime\runtime.js:45:44 in tryCatch node_modules\regenerator-runtime\runtime.js:135:28 in invoke node_modules\regenerator-runtime\runtime.js:145:19 in PromiseImpl.resolve.then$argument_0 node_modules\promise\setimmediate\core.js:37:14 in tryCallOne node_modules\promise\setimmediate\core.js:123:25 in setImmediate$argument_0 node_modules\react-native\Libraries\Core\Timers\JSTimers.js:146:14 in _callTimer node_modules\react-native\Libraries\Core\Timers\JSTimers.js:194:17 in _callImmediatesPass node_modules\react-native\Libraries\Core\Timers\JSTimers.js:458:30 in callImmediates [native code]:null in callImmediates node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:407:6 in __callImmediates node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:143:6 in __guard$argument_0 node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:384:10 in __guard node_modules\react-native\Libraries\BatchedBridge\MessageQueue.js:142:17 in __guard$argument_0 [native code]:null in flushedQueue [native code]:null in invokeCallbackAndReturnFlushedQueue

Tell us which versions you are using:

• react-native-ble-manager v7.2.0
• react-native v37.0.1 const BleManagerModule = NativeModules.BleManager; BleManagerModule is null I have see #301 ，you say expo don’t support external Native Modules. So should i do ,expo can use this

[Cupidor]

react native

react native can use ,expo can not use toothblue module

[marcosinigaglia]

I don’t get your point. You can’t use external native module in Expo.