React-native-ble-plx: Unable to detect connection lost in-between, It seems like method onDeviceDisconnected not been call.

[priyanka-Sadh]

scenario I am following.

1. Made a connection with device inside the mobile application.
2. After some time to detect disconnection, I just powered off of ble device.
3. Application should detect disconnection in that case too.
4. please check scanAndConnect method, inside that i am using disconnection listener, and guide me to implement this please.
   my code script which is now working. no error no nay message. It's been ignored i guess.
   `
   async scanAndConnect() {
   this.setState({text1:"Scanning..."})
   this.manager.startDeviceScan(null, null, (error, device) => {
   console.log("Scanning...");
   if (null) {
   console.log('null')
   }
   if (error) {
   this.alert("Error in scan=> "+error)
   this.setState({text1:""})
   this.manager.stopDeviceScan();
   return
   }
   if( /[_]/g.test( device.name ) )
   {
   let nameSplit = device.name.split('_');
   if(nameSplit[0] == 'mydevice'){
   const serviceUUIDs= device.serviceUUIDs[0]
   this.setState({text1:"Connecting to "+device.name, deviceName : device.name})
   this.manager.stopDeviceScan();
   //**listener for disconnection
   this.BleManager.onDisconnected(this.state.deviceid, (error, device) => {
   console.log(error)
   console.log('DisConnected ' + new Date().toISOString());
   })
   //**listener for disconnection
   this.manager.connectToDevice(device.id, {autoConnect:true}).then((device) => {
   (async () => {
   const services = await device.discoverAllServicesAndCharacteristics()
   const characteristic = await this.getServicesAndCharacteristics(services)
   this.setState({"deviceid":device.id, serviceUUID:serviceUUIDs, characteristicsUUID : characteristic.uuid,device:device })
   this.setState({text1:"Conneted to "+device.name})
   })();
   this.setState({device:device})
   return device.discoverAllServicesAndCharacteristics()
   }).then((device) => {
   return this.setupNotifications(device)
   }).then(() => {
   console.log("Listening...");
   }, (error) => {
   this.alert("Connection error"+JSON.stringify(error))
   })
   }
   }
   });
   }

`

[josef256]

im also having the same probleme. onDeviceDisconnected is ignored
ble plx version : 2.0.0

[priyanka-Sadh]

I appreciate your respond.
What is the solution for it ? Did you find something @josef256 ?

[josef256]

@priyanka-Sadh hello yes i found something,
i downgraded my version to 1.1.1 & it worked.(the 1.1.1 version is not compatible with react antive 0.60+, so you need to a little tweak to make it run)

more info in here #663

[priyanka-Sadh]

Thanks @josef256 let me try for same.

[priyanka-Sadh]

Are there any hope of same can support in 2.0.0
Library is being maintained I think.
Any thought about this. @josef256 and guys who maintaining this Library ?

[priyanka-Sadh]

Hey @josef256 I tried V1.1.1 to setup in RN 0.62.2
I just need to remove apply plugin: 'groovyx.android and build installation worked well.
So when I am trying Interrupting the connection in between, device.onDisconnected() method is been called. But the issue coming inside the node_module ble-plx Library (check screen shot). Any suggestion on this please ?

[josef256]

@priyanka-Sadh post the full code with the onDisconnected call

also if you edited the file directly in the node_modules it will reset with every npm install (do the importance of a postInstall script)

[priyanka-Sadh]

Hey @josef256 I was writting onDisconnected method call at wrong place. I fixed it, now onDisconnected method running fine on android.
But now I am trying same on ios and running the project says some error 'BleClient-Swift.h' file not found, Any suggestion on this please.

[josef256]

@priyanka-Sadh id didn't try it on ios yet.
but let me know if you fix it