implementing custom service

RE: implementing custom service

Vidar Berg — Fri, 05 Jul 2024 12:45:56 GMT

Serial recovery is perfomed within the bootloader which does not run concurrently with the main app, so I wouldn't expect the DFU process to interfere with your regular UART comminucation.

[quote user="Srikara"]interface ot iMX the same UART will not be there for BLE peripheral UART purpose[/quote]

It is up to the application to decide what data to relay over the BLE link.

RE: implementing custom service

Srikara — Fri, 05 Jul 2024 11:50:18 GMT

we need UART for DFU. For DFU he suggested serial recovery and other method. I need to test that in our board. Serial recovery I have tested in DK.

Also we want to have one option of BLE peripheral UART. This we have tested in DK and in OUR board. But when we interface ot iMX the same UART will not be there for BLE peripheral UART purpose and DFU.

As of now you can ignore DFU, as we are verifying serail recovery method.

RE: implementing custom service

Vidar Berg — Thu, 04 Jul 2024 12:06:25 GMT

Could you give a brief summary of what you need the UART for? I understand from the discussion that you use it as an interface between the nRF5 and IMX, but I'm not sure what else you need it for.

RE: implementing custom service

Srikara — Mon, 01 Jul 2024 08:55:12 GMT

[quote userid="106736" url="~/f/nordic-q-a/109776/implementing-custom-service/491320"]These sound like custom requirements for Bluetooth LE operations.
I suggest that you take the DevAcademy Bluetooth Course and learn how to implement your own Bluetooth LE applications so you can make it custom to match your requirements.[/quote]

Actually what i mean to say is uart0 is already engaged with iMX, and also uart0 is getting used in peripheral UART.

So for both to work together it is not possible right?

Because we have only one uart is exposed in our custom HW.

RE: implementing custom service

Sigurd Hellesvik — Fri, 28 Jun 2024 12:10:35 GMT

[quote user="Srikara"]

If he is sending request from android app, he will receive response to android app.

for example: read command is sent

then all the nearby RFID tags details will be sent to android app

If he is sending from iMX he will be received to iMX

for example: read command is sent

then all the nearby RFID tags details will be sent to iMx

Like read we have lot of commands so usage may be iMX/Android app.

This is our requirement. Will this can be done? If so How we will do it.

[/quote]

These sound like custom requirements for Bluetooth LE operations.
I suggest that you take the DevAcademy Bluetooth Course and learn how to implement your own Bluetooth LE applications so you can make it custom to match your requirements.

EDIT:
And when I say "custom", I mean that we do not have any samples that does exactly this

RE: implementing custom service

Srikara — Fri, 28 Jun 2024 07:42:36 GMT

we need both, same customer may send the data from iMX and android app.

If he is sending request from android app, he will receive response to android app.

for example: read command is sent

then all the nearby RFID tags details will be sent to android app

If he is sending from iMX he will be received to iMX

for example: read command is sent

then all the nearby RFID tags details will be sent to iMx

Like read we have lot of commands so usage may be iMX/Android app.

This is our requirement. Will this can be done? If so How we will do it.

[quote userid="106736" url="~/f/nordic-q-a/109776/implementing-custom-service/491224"]

You have two alternatives, and I am not sure which one you need. Here they are, with suggested solutions:

Receive data over UART from iMX and send directly over BLE without changing data:
1. Run Peripheral UART sample as is. Minor changes needed.
Receive data over UART from iMX. Do operations with data on nRF. Then send something else over BLE.
1. Learn how to implement Bluetooth applications from DevAcademy Bluetooth course. Specifically its Lesson on Bluetooth and UART will be useful for you.

[/quote]

Based on our requirement i think this is not useful i Believe.

RE: implementing custom service

Sigurd Hellesvik — Fri, 28 Jun 2024 07:24:34 GMT

[quote user="Srikara"]

This code is merging of two nRF connect SDK sample applications.

C:\ncs\v2.2.0\nrf\samples\bluetooth\peripheral_uart

and C:\ncs\v2.2.0\zephyr\samples\drivers\uart\echo_bot

[/quote]

The peripheral_uart sample already does UART for your.
I do not think merging these two samples makes much sense.

You have two alternatives, and I am not sure which one you need. Here they are, with suggested solutions:

Receive data over UART from iMX and send directly over BLE without changing data:
1. Run Peripheral UART sample as is. Minor changes needed.
Receive data over UART from iMX. Do operations with data on nRF. Then send something else over BLE.
1. Learn how to implement Bluetooth applications from DevAcademy Bluetooth course. Specifically its Lesson on Bluetooth and UART will be useful for you.

Do I understand correctly? Does my suggestions make sense?

RE: implementing custom service

Srikara — Fri, 28 Jun 2024 04:44:55 GMT

Sorry, ithink misunderstood.

I am asking about second picture where it is UART interface to iMX.

In this case UARTE0 is needed and it uses uart0 and in actual communication case also

#define UART_DEVICE_NODE DT_CHOSEN(zephyr_shell_uart)
struct device *uart_dev = DEVICE_DT_GET(UART_DEVICE_NODE);

uart0 is used.

So we want both BLE and uart communication need to be worked.

Please gothrough the code i ahve shared. YOu will have a clue what i am asking.

This code is merging of two nRF connect SDK sample applications.

C:\ncs\v2.2.0\nrf\samples\bluetooth\peripheral_uart

and C:\ncs\v2.2.0\zephyr\samples\drivers\uart\echo_bot

these two together should work on uart communication.

RE: implementing custom service

Sigurd Hellesvik — Thu, 27 Jun 2024 15:43:39 GMT

[quote user="Srikara"]Still we need CONFIG_NRFX_UARTE0=y with CDC_ACM interface to iMX and also UART interface?[/quote]

I do not think you need UARTE drivers to do CDC_ACM, no.

[quote user="Srikara"]Is this both possible in single application. Currently as you suggested we are in process to move UART method to serial recovery method. But before that making our code work with BLE over UART has become priority. So requesting this in paralllel to other ticket.[/quote]

MCUmgr only supports one interface at a time for its DFU, unfortunally. It is probably possible to work around this somehow, but I do not think it will be easy.
I think that generally, it will be easier to make the app if you have different application code for the UART device and the CDC ACM device.

RE: implementing custom service

Srikara — Thu, 27 Jun 2024 03:34:11 GMT

we have two different products where in 1 it goes as USB CDCACM.

In another we have UART interface. In this we want to tap the data to BLE connected to Android app/ios app. In the same we want UART communication to iMX.

Ofcourse currently testing this with laptop instead of iMX where UART driver send data to COM(testing with tera term). Final thing will be iMX.

Is this both possible in single application. Currently as you suggested we are in process to move UART method to serial recovery method. But before that making our code work with BLE over UART has become priority. So requesting this in paralllel to other ticket.

adding to the above query, UARTE is taking uart0 i think.

Just now found nelw lines from:

config NRFX_UART0

bool "UART0 driver instance"

depends on $(dt_nodelabel_has_compat,uart0,$(DT_COMPAT_NORDIC_NRF_UART))

select NRFX_UART

config NRFX_UARTE

bool

config NRFX_UARTE0

bool "UARTE0 driver instance"

depends on $(dt_nodelabel_has_compat,uart0,$(DT_COMPAT_NORDIC_NRF_UARTE))

select NRFX_UARTE

C:\ncs\v2.2.0\zephyr\modules\hal_nordic\nrfx\kconfig

So will uart0 is available for BLE and also COM/shell connection.

for shell/data communication we are using below"

#define UART_DEVICE_NODE DT_CHOSEN(zephyr_shell_uart)
struct device *uart_dev = DEVICE_DT_GET(UART_DEVICE_NODE);

Peripheral UART uses:

static const struct device *uart = DEVICE_DT_GET(DT_CHOSEN(nordic_nus_uart));

Both can be used in same application?

Sorry for multiple edits.

I thought one thing, so added the UART code to BLEperipheral UART code which i tested on nRF52840 DK.

On to the same I tested echo_bot code seperately to test serial code.

ow I merged both, and see only BLE code works as it took over the UART first.

In main.c the code in #if 1 ... #endif belongs to serial.

Attaching here.devzone.nordicsemi.com/.../BLEperipheraUART.zip

RE: implementing custom service

Sigurd Hellesvik — Wed, 26 Jun 2024 10:48:54 GMT

We are talking about multiple devices now.
Are you able to make a drawing of communication lines here, so I do not misunderstand?

RE: implementing custom service

Srikara — Wed, 26 Jun 2024 09:49:58 GMT

Hi,

As you know was busy with serail recovery testing did not spend time on this.

Now on DK i am able to test the peripheral UART using nRF Tool box.

In peripheral UART we are using

# Enable the UART driver

CONFIG_UART_ASYNC_API=y

CONFIG_NRFX_UARTE0=y

CONFIG_SERIAL=y

now my query is initially i want to port this to our custom board with CDC_ACM.

also we have the UART implemented and custom driver is used where we are able to communicate to UART and get the data also.

Still we need CONFIG_NRFX_UARTE0=y with CDC_ACM interface to iMX and also UART interface?

RE: implementing custom service

Srikara — Fri, 14 Jun 2024 01:58:54 GMT

ok sure. Will check that.

RE: implementing custom service

Sigurd Hellesvik — Wed, 12 Jun 2024 12:53:56 GMT

For the android app, it is mostly up to you.

However, we have the source code for the nRF Toolbox open source: https://github.com/NordicSemiconductor/Android-nRF-Toolbox. You can use this as inspiration.

RE: implementing custom service

Srikara — Wed, 12 Jun 2024 09:07:08 GMT

with NRF tool box it works fine.

Now this peripheral UART we want to port to other application (which we were discussing in private ticket.).

Now my team head want this app to be ported to our app and also the android app to support this.

Can we suggest the steps to be proceeded to create android app to handle this(we may do it from scratch or already we have some app and we want to add this.)

Usually there will be commands sent on RX characteristic and will receive the data from nRF.

RE: implementing custom service

Sigurd Hellesvik — Tue, 11 Jun 2024 11:52:10 GMT

The code I shared is meant for two different DKs, one for each sample.

You can also use the UART Peripheral sample together with the https://www.nordicsemi.com/Products/Development-tools/nrf-toolbox, which should make it easy to test.

Does this answer your questions?

RE: implementing custom service

Srikara — Tue, 11 Jun 2024 09:19:10 GMT

[quote userid="112768" url="~/f/nordic-q-a/109776/implementing-custom-service/488263"]Also i am able to send in the RX characteristic only test and able to see that data in COM port connection(Teraterm)[/quote]

able to send any data but able to see only test data not byte. But in the RTT logs i can see data is received. Also when send ign data from nRF to android app the data sent is failed.

Sorry. One more point, as per the link you shared i have just build the code without any modifications mentioned in the documentaion.

Will that be need for this to work.

RE: implementing custom service

Srikara — Tue, 11 Jun 2024 09:11:22 GMT

[quote userid="106736" url="~/f/nordic-q-a/109776/implementing-custom-service/487883"]developer.nordicsemi.com/.../quote]

Thank you. I have used this peripheral UART. built and falshed onto nRF52840DK.

Foolowed the steps mentioned in testing column.

Did not understand the point 8.

Also i am able to send in the RX characteristic only test and able to see that data in COM port connection(Teraterm)

to send the data from nRF DK to nRF Connect app pont 12 is not working. I am not seeing any thing happening on the android app side. How to verify the notification?

[/quote]

RE: implementing custom service

Sigurd Hellesvik — Fri, 07 Jun 2024 11:24:34 GMT

[quote user="Srikara"]Like in nRF 5 sdk , do we have any sample which supports UART over BLE.[/quote]

Yes

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/central_uart/README.html

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/peripheral_uart/README.html

[quote user="Srikara"]Do we need Descriptor and NOTIFY in WRITE case/ READ case.[/quote]

Android -> nRF: WRITE, do not use notify
nRF -> Android: READ, use notify

RE: implementing custom service

Srikara — Fri, 07 Jun 2024 06:12:37 GMT

hi,

Like in nRF 5 sdk , do we have any sample which supports UART over BLE.

We want to recive the request from the Android app and then send the data to app.

THe data is read from UART in nRF.

One more thing is

1.We will receive request from Android app(actually read RFID data)

2.we will be sending the data to Android app--> this data may be continuous(this will be RFID tags data)

For this i feel two characteristics needed.

. service

.--- Read Chracteristic ----READ

--- write characteristic ---- WRITE

Do we need Descriptor and NOTIFY in WRITE case/ READ case.

can you suggest on this.

RE: implementing custom service

Sigurd Hellesvik — Tue, 14 May 2024 11:08:30 GMT

[quote user="Srikara"]Ok Ok got it. You are saying in the settings we can select to see all the device instead of running with SMP server.[/quote]

Yes.

And if you make your own phone app later you can make that phone app sort for your UUID specifically

RE: implementing custom service

Srikara — Tue, 14 May 2024 08:50:29 GMT

Ok Ok got it. You are saying in the settings we can select to see all the device instead of running with SMP server.

Will test that, may not be now as busy in other project/issues. \

Thank you.

RE: implementing custom service

Sigurd Hellesvik — Tue, 14 May 2024 08:47:31 GMT

[quote user="Srikara"]But for the FW upgrade if we are using nRF Device manager app it will shortlist by the DFU service right?[/quote]

Yes, but in the settings for the app you can choose to list all devices instead, and then choose device, even if it is listing the DFU service or not.

Does that answer your question?

RE: implementing custom service

Srikara — Tue, 14 May 2024 05:31:48 GMT

Sorry for the late response. I was on leave for last 2weeks. I was able to understand how to add custom service. But Now how to add the two services and in the advertisemnet packet i may need to have both DFU service and the custom service as the app will intiate the connection if the custom service is implemented. But for the FW upgrade if we are using nRF Device manager app it will shortlist by the DFU service right? ot is there any other way we can do DFU over BLE.: devzone.nordicsemi.com/.../ncs-dfu

RE: implementing custom service

Sigurd Hellesvik — Mon, 29 Apr 2024 11:42:33 GMT

Did you look at the course I linked to?

Were you able to add a custom service?