Connection not establish in IOS

[sarveshkaushik]

I am already set all settings but connection not establish. please help me how to make connection easily .

NativeModules. RNZebraBluetoothPrinter.connectDevice(item.address)
.then((result) => {
alert('connection result',result);
if (!result) {
alert('Could not connect to printer. Please check printer connection.')
} else {
alert('connection establish')
}
})
.catch(e => console.log(e))
}

[varunwyest]

We are not able to see the list of devices which are paired. How did you manage to see the list of paired devices?

[kkureli]

hi, could u solve?

[anmoljain10]

@varunwyest @kkureli , it is not possible to see paired devices in iOS as of now. We need to manage it via our app only. As i have added in the readme file, it will return nil. We can use the scanDevices function to get the devices near us and the connect using connectDevice function, after the device is connected we can use a global state/store to save which devices are connected. Sorry, iOS functionality is kind of limited due to its permission issues. Happy to get PRs for the solution.

[kkureli]

Hi, thanks for your response, I can easily print zpl codes on Android devices but for iOS I have tried 4 different zebra printers and I couldnt print any zpl code. Could u help me ? Did u try with any ios device with any zebra printer?

[anmoljain10]

@kkureli , i used zebra ZD-420 BLE printer. Are we able to connect with the printer from the iOS device? If its connected properly, we could see the device in the bluetooth settings as connected. After that, we can send the zpl for printing.

Also, if things don't work, try changing the chunk size in this print function and try adding a timeout. https://github.com/anmoljain10/react-native-zebra-bluetooth-printer/blob/master/ios/RNZebraBluetoothPrinter.m. If it works we can make a PR to send chunk size as a parameter. Hope it helps.

[kkureli]

When I scan it with package it doesnt find my zq510 but I can connect it from iphone's settings. After I connected from settings, I am trying printing but it didnt work, also I changed chunk size to 50 and 100. Also, do u know how can I learn printer's unique id, I have only its mac address. Thanks.

@kkureli , i used zebra ZD-420 BLE printer. Are we able to connect with the printer from the iOS device? If its connected properly, we could see the device in the bluetooth settings as connected. After that, we can send the zpl for printing.

Also, if things don't work, try changing the chunk size in this print function and try adding a timeout. https://github.com/anmoljain10/react-native-zebra-bluetooth-printer/blob/master/ios/RNZebraBluetoothPrinter.m. If it works we can make a PR to send chunk size as a parameter. Hope it helps.

[anmoljain10]

@kkureli , it's better to connect the device from app only using connectDevice function. That's how, the bluetooth manager will get instantiated. You can check unique identifier in the bluetooth setting if it's available or it should be written on the printer manual/beneath the printer.
Also note the sometimes when using scanDevices, we'll not get the name of the device but we do get the unique identifier associated with it. So we use that for printing.

[kkureli]

@anmoljain10 Hello again, now I am trying with ZQ220 and I can connect to printer with package but when I want to print, it gives me this error

.

[kkureli]

@anmoljain10 also this

,