Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

RE: Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

ock — Mon, 22 Jan 2018 17:12:16 GMT

@Petter Myhre thanks!!!!

RE: Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

Petter Myhre — Fri, 10 Nov 2017 09:44:23 GMT

Are you using tags? This could happen if you have an extra comma in tags.

RE: Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

Abhinav — Wed, 08 Nov 2017 12:36:38 GMT

OK, but I am not able to post new question it is showing this error: Internal server error system error log is recorded, error will be fixed as soon as possible We're sorry for the inconvenience!

What to do?

RE: Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

Petter Myhre — Wed, 08 Nov 2017 11:23:26 GMT

Well yes, connecting shouldn't be to hard. The example should already be scanning, then you need to figure out how you want connection to be triggered. You can have a look at how BLE_GAP_EVT_ADV_REPORT is handled in ble_evt_handler(). Anyways, I think you should add a new question, this is not something that should be discussed in the comments of independent question.

RE: Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

Abhinav — Wed, 08 Nov 2017 08:08:59 GMT

Not sure about compatibility, but ble_app_uart_c can't we modify the code and make it to connect to device which doesn't have Nordic Uart Service.

RE: Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

Petter Myhre — Wed, 08 Nov 2017 07:51:10 GMT

Are you sure they are even compatible? The ble_app_uart_c is designed to work with peripheral having the Nordic UART Service.

RE: Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

Abhinav — Wed, 08 Nov 2017 06:36:11 GMT

Hello Petter,

In TI CC2640R2 I am using this code

dev.ti.com/.../

It enable UART service in peripheral. I am able to transfer data using "SerialConsole" app in my android phone and by connecting Peripheral in PC via Putty. But How to do this by using nRF5_SDK_14.0.0_3bcc1f7\examples\ble_central\ble_app_uart_c this code. Even I am not able to connect also.

Waiting for reply. Thanks

RE: Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

Petter Myhre — Mon, 06 Nov 2017 11:14:05 GMT

What code are you running on this peripheral? Are you able to connect to it using nRF Connect?

RE: Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

Abhinav — Fri, 03 Nov 2017 11:03:22 GMT

Hello,

I am using nRF5_SDK_14.0.0_3bcc1f7\examples\ble_central\ble_app_uart_c example program.

Firstly, I tried with nRF BLE peripheral device and flashed nRF5_SDK_14.0.0_3bcc1f7\examples\ble_peripheral\ble_app_uart code, it is working fine and exchanging data also between central and peripheral.
Secondly, I tried with some other (TI's CC2640R2) vendor BLE peripheral device. Not able to connect, Now my question is this "What changes I have to make in ble_app_uart_c code to connect to some other peripheral device". I tried changing NUS_BASE_UUID, BLE_UUID_NUS_SERVICE, BLE_UUID_NUS_RX_CHARACTERISTIC, BLE_UUID_NUS_TX_CHARACTERISTIC but still it is not connecting to CC2640R2 BLE peripheral device.

Waiting for reply.

RE: Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

Petter Myhre — Mon, 25 Sep 2017 11:40:59 GMT

After connecting the next step is service discovery. I'm not sure why the connection is dropped, probably it could be because the peer disconnects, because of reset when APP_ERROR_CHECK() is called with an error that is not NRF_SUCCESS (0x00000000), or because sd_ble_gap_disconnect() is called.

RE: Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

Abhinav — Mon, 25 Sep 2017 11:31:35 GMT

Thanks for suggestion

I have already detected its (HM10) UUID and edited the code (ble_app_uart_c), while scanning code able to found HM10 and tries to connect but after connection immediately it drops the connection and again started scanning, this continues in infinite loop.

RE: Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

Petter Myhre — Mon, 25 Sep 2017 10:33:53 GMT

Ok. You can probably use ble_app_uart_c as a starting point, but I have no idea of the behavior of the program on the HM10. I would use something like nRF Connect (and even better a sniffer) to look for any differences between the HM10 code, and the ble_app_uart example. The code on the HM10 is probably using a different UUID at least. I dont' really know.

RE: Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

Abhinav — Mon, 25 Sep 2017 10:18:24 GMT

Thanks for reply.

I don't have access to HM10's code but it is running uart profile. That is pre compiled BLE 4.0 module using its RX-TX we can communicate.

Is there any way to use this (ble_app_uart_c example) code to communicate with different vendor modules which implement uart profile.

RE: Implementing UART profile between NRF52832 (as central) and HM10 (as peripheral)

Petter Myhre — Mon, 25 Sep 2017 09:21:31 GMT

The ble_app_uart_c example implements the Nordic UART service client. It is a GAP central.

The application scans peripheral devices and connects to a device that advertises with the NUS UUID in its advertisement report. After connecting, the application enables notifications on the device that delivers the Nordic UART Service.

This code is designed to work peripherals that implements the Nordic UART service server. It doesn't work with all possible services.

What code are you running on the HM10?