Adding functionality to nRF Connect Desktop Bluetooth Low Energy App

RE: Adding functionality to nRF Connect Desktop Bluetooth Low Energy App

ThienVu — Thu, 25 Jun 2020 02:30:40 GMT

Thanks everyone.

I looked at the writeCharacteristic function and noticed that it already have dispatch() in there, so I'm thinking it is called just like a regular function when needed, and it will dispatch the appropriate action accordingly. I think my problem is maybe I'm using the wrong function to do what I want.

And regarding states and reducers, for this app, what do I need to keep track of in the state?

Sorry for asking many questions. There isn't much documentation for nrf connect apps that I can find.

This is the writeCharacteristic I'm talking about, located in deviceDetailsActions.js

export function writeCharacteristic(characteristic, value) {
    return (dispatch, getState) => (
        new Promise((resolve, reject) => {
            const adapterToUse = getState().app.adapter.bleDriver.adapter;

            if (adapterToUse === null) {
                reject(new Error('No adapter selected'));
                return;
            }

            const ack = !characteristic.properties.writeWoResp;

            adapterToUse.writeCharacteristicValue(characteristic.instanceId, value, ack, error => {
                if (error) {
                    dispatch(completedWritingAttributeAction(characteristic, null, error));
                    reject(new Error(error.message));
                    return;
                }
                dispatch(completedWritingAttributeAction(characteristic, value));
                resolve();
            });
        }).catch(error => {
            dispatch(showErrorDialog(error));
        })
    );
}

RE: Adding functionality to nRF Connect Desktop Bluetooth Low Energy App

ThienVu — Thu, 25 Jun 2020 02:12:46 GMT

Thank you.

Sorry for asking many questions. There isn't much documentation for nrf connect apps that I can find.

RE: Adding functionality to nRF Connect Desktop Bluetooth Low Energy App

Joakim Jakobsen — Mon, 22 Jun 2020 10:29:44 GMT

Some feedback from our developers:

The correct way to implement the function is to

Write the function, like calling deviceDetailActions and put it in a file in lib/actions
Create a container under lib/containers which pass the function to the component
Import the function into the component and use it

So it is using React and Redux framework. And in redux you use dispatch() to trigger the actions and change the states. So furthermore, if you need to manage the states, you have to create a file under reducers to manage the state and put it in container so that component can update it whenever the state has been updated.

Br,
Joakim

RE: Adding functionality to nRF Connect Desktop Bluetooth Low Energy App

ThienVu — Mon, 22 Jun 2020 02:15:08 GMT

Hi.

Thank you for helping.

I tried that, but it didn't work. The value on the '1234' characteristic of the advertising device didn't change. I think I need to call this function a very specific way.

Have anyone modified this app? Any help?

RE: Adding functionality to nRF Connect Desktop Bluetooth Low Energy App

Bence — Fri, 19 Jun 2020 10:57:58 GMT

In your code onPairDevice is a property of ConnectedDevice which must be a function, but you did not provide a function but rather the return value of a function (writeCharacteristic). Try this way:

// onPairDevice={writeCharacteristic('1234', 0x22)}
onPairDevice={() => { writeCharacteristic('1234', 0x22); }}

RE: Adding functionality to nRF Connect Desktop Bluetooth Low Energy App

ThienVu — Fri, 19 Jun 2020 01:59:59 GMT

Can someone please help? I'm very close now and only need a little push

RE: Adding functionality to nRF Connect Desktop Bluetooth Low Energy App

ThienVu — Wed, 17 Jun 2020 03:33:23 GMT

Hello,

I've looked at the source code and was able to render a button and assigned a logger.info() in ConnectedDevice Component and DeviceDetails Component.

I also found the writeCharacteristic(characteristic, value) in deviceDetailActions, that corresponds to my needs. However, how do I call this function the correct way. I tried this in DeviceDetails Component but didn't work. onPairDevice is the extra function I want. I only post the part that I changed in each Component:

const DeviceDetailsView = ({
    device,
    [snipped]
    onPairDevice,
})

<ConnectedDevice
                id={`${instanceId}_details`}
                sourceId={`${adapter.instanceId}_details`}
                [snipped]
                onPairDevice={writeCharacteristic('1234', 0x22)}
            />
            
DeviceDetailsView.propTypes = {
    device: PropTypes.object.isRequired,
    [snipped]
    onPairDevice: PropTypes.func.isRequired,
};

this is in ConnectedDevice Component:

const ConnectedDevice = ({
    id,
    [snipped]
    onPairDevice,
}) => {

const onSelect = eventKey => {
        switch (eventKey) {
            case 'Disconnect':
                onDisconnect();
                break;
            [snipped]
            case 'pairDevice':
                onPairDevice();
                break;
            default:
                console.log('Unknown eventKey received:', eventKey);
        }
    };
    
    
    ConnectedDevice.propTypes = {
    id: PropTypes.string.isRequired,
    [snipped]
    onPairDevice: PropTypes.func.isRequired,
};

RE: Adding functionality to nRF Connect Desktop Bluetooth Low Energy App

ThienVu — Sat, 13 Jun 2020 14:56:55 GMT

Thanks for the reply.

I downloaded the BLE source code.

My question is how do I use the bluetooth library in the BLE app? Where is it in the source code?

RE: Adding functionality to nRF Connect Desktop Bluetooth Low Energy App

Joakim Jakobsen — Fri, 12 Jun 2020 08:59:43 GMT

Hi.

Talked to one of our developers;

You can start from here:
https://nordicsemiconductor.github.io/pc-nrfconnect-docs/

And then get the existing BLE app following the example here:
https://nordicsemiconductor.github.io/pc-nrfconnect-docs/get_an_existing_app_s_sources

The BLE source is at:
https://github.com/NordicSemiconductor/pc-nrfconnect-ble

Just can just find the place you would like to update and change it.

If you need more information, let me know and I'll forward your questions to our developers.

Br,
Joakim

RE: Adding functionality to nRF Connect Desktop Bluetooth Low Energy App

ThienVu — Fri, 12 Jun 2020 04:05:24 GMT

Anyone can help? I really don't understand the structure of the included library in the BLE App. What library/component do I need to look into to use the Bluetooth driver to do what I need (send/receive notification string)?