had some bluetooth questions

[delislej]

hi there, i wanted to try making an android app for the blue retro device. however using the react native ble library, i get strings instead of the dataviews that you get using the web bluetooth API.

for example the api version should be 2 but i get a weird string for value.

Characteristic {
"_manager": BleManager {
"_activePromises": Object {},
"_activeSubscriptions": Object {},
"_errorCodesToMessagesMapping": Object {
"0": "Unknown error occurred. This is probably a bug! Check reason property.",
"1": "BleManager was destroyed",
"100": "BluetoothLE is unsupported on this device",
"101": "Device is not authorized to use BluetoothLE",
"102": "BluetoothLE is powered off",
"103": "BluetoothLE is in unknown state",
"104": "BluetoothLE is resetting",
"105": "Bluetooth state change failed",
"2": "Operation was cancelled",
"200": "Device {deviceID} connection failed",
"201": "Device {deviceID} was disconnected",
"202": "RSSI read failed for device {deviceID}",
"203": "Device {deviceID} is already connected",
"204": "Device {deviceID} not found",
"205": "Device {deviceID} is not connected",
"206": "Device {deviceID} could not change MTU size",
"3": "Operation timed out",
"300": "Services discovery failed for device {deviceID}",
"301": "Included services discovery failed for device {deviceID} and service: {serviceUUID}",
"302": "Service {serviceUUID} for device {deviceID} not found",
"303": "Services not discovered for device {deviceID}",
"4": "Operation was rejected",
"400": "Characteristic discovery failed for device {deviceID} and service {serviceUUID}",
"401": "Characteristic {characteristicUUID} write failed for device {deviceID} and service {serviceUUID}",
"402": "Characteristic {characteristicUUID} read failed for device {deviceID} and service {serviceUUID}",
"403": "Characteristic {characteristicUUID} notify change failed for device {deviceID} and service {serviceUUID}",
"404": "Characteristic {characteristicUUID} not found",
"405": "Characteristics not discovered for device {deviceID} and service {serviceUUID}",
"406": "Cannot write to characteristic {characteristicUUID} with invalid data format: {internalMessage}",
"5": "Invalid UUIDs or IDs were passed: {internalMessage}",
"500": "Descriptor {descriptorUUID} discovery failed for device {deviceID}, service {serviceUUID} and characteristic {characteristicUUID}",
"501": "Descriptor {descriptorUUID} write failed for device {deviceID}, service {serviceUUID} and characteristic {characteristicUUID}",
"502": "Descriptor {descriptorUUID} read failed for device {deviceID}, service {serviceUUID} and characteristic {characteristicUUID}",
"503": "Descriptor {descriptorUUID} not found",
"504": "Descriptors not discovered for device {deviceID}, service {serviceUUID} and characteristic {characteristicUUID}",
"505": "Cannot write to descriptor {descriptorUUID} with invalid data format: {internalMessage}",
"506": "Cannot write to descriptor {descriptorUUID}. It's not allowed by iOS and therefore forbidden on Android as well.",
"600": "Cannot start scanning operation",
"601": "Location services are disabled",
},
"_eventEmitter": NativeEventEmitter {},
"_scanEventSubscription": null,
"_uniqueId": 5,
},
"deviceID": "E8:31:CD:C3:D4:7A",
"id": 17,
"isIndicatable": false,
"isNotifiable": false,
"isNotifying": false,
"isReadable": true,
"isWritableWithResponse": false,
"isWritableWithoutResponse": false,
"serviceID": 11,
"serviceUUID": "56830f56-5180-fab0-314b-2fa176799a00",
"uuid": "56830f56-5180-fab0-314b-2fa176799a06",
"value": "Ag==",
}

any ideas? thanks!

[delislej]

ok i figured it out, the data is coming in as a base64 string, just decoded it and made a Uint8Array from it and bam, proper data!