Library for integrating nrf52840 with MTk7628 running on openwrt

[SanthoshN]

Hi Nordic Engineer,

We want to interface NRF52840 with MTK7628 over UART. Is there a client library for nrf52840 which we can integrate with our application which runs on MTK7628..??

Our operational flow is as follows,

A. Application running on MTK7628 sends command to NRF52840 over UART/any serial interface 

B. Application receive response from BT module.

C. After getting the response from NRF52840 our application will process the info and does the rest.

We came through ACI and HCI interfaces, are these interfaces specifically used to communicate between host module and nrf52840 BT module..?? If yes, please let us know the procedure for doing this.

We don't want to use Bluez layer to communicate with NRF52840 module.

Thanks

[Stian Røed Hafskjold]

You can check out the serialization API: https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/lib_serialization.html?cp=5_1_3_42

The nRF52 will be running the BLE stack (softdevice) and your host MCU (in this case the MTK7628  as I understand) can communicate with the softdevice over UART (or other protocols).

The host software pc-ble-driver is written to be run on a PC and communicate over UART to the BLE stack. It is written in C and can be ported to your host MCU. It contains a couple of examples to get started. The examples in the SDK that normally runs on the nRF52 can also be ported to your host MCU (or used as a reference): https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/serialization_porting_guide.html?cp=5_1_3_42_5

[Goutham Reddy]

Hi,

We followed steps given in pc-ble-driver and able to build the pc-ble-driver, but for Connectivity HEX it is having dependency of nRF5x Command-Line Tools for Linux 64-bit.

We are not able to download it as it is showing 404 Page not Found error.

Is there any alternative way to download and install nRF5x Command-Line Tools for Linux 64-bit.

[Stian Røed Hafskjold]

Here's the correct link: http://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF-Command-Line-Tools/Download#infotabs

Anyways, the command line tools require the nrfjprog DLL and we currently only supports this for Linux running on x86/64 architecture. However, the nrf52840 has a USB interface, and you can use UART over USB to communicate with the device. This way you remove the nrfjprog dependency.

I wrote an answer here to another question about running pc-ble-driver on a raspberry pi, https://devzone.nordicsemi.com/f/nordic-q-a/47329/connection-3b-armv8-and-nrf-52840-dongle/188449#188449 Don't know if that's helpful but you can have a look.

[SanthoshN]

santhosh@santhosh:~/pc-ble-driver/hex/examples$ sudo ./heart_rate_monitor_sd_api_v5 /dev/ttyACM0
Serial port used: /dev/ttyACM0
Baud rate used: 1000000
Info: Successfully opened /dev/ttyACM0. Baud rate: 1000000. Flow control: none. Parity: none.
Status: 6, message: Target Reset performed
Error: h5_decode error, code: 0x802c, H5 error count: 1. raw packet: c0 60 00 01 01 c0
Error: h5_decode error, code: 0x802c, H5 error count: 2. raw packet: c0 60 00 01 01 c0
Error: h5_decode error, code: 0x802c, H5 error count: 3. raw packet: c0 60 00 01 01 c0
Error: h5_decode error, code: 0x802c, H5 error count: 4. raw packet: c0 60 00 01 01 c0
Error: h5_decode error, code: 0x802c, H5 error count: 5. raw packet: c0 60 00 01 01 c0
Error: h5_decode error, code: 0x802c, H5 error count: 6. raw packet: c0 60 00 01 01 c0
Status: 0, message: No response from device. Tried to send packet 6 times.
Failed to open nRF BLE Driver. Error code: 0x0D

I am facing the above error

For testing purpose I am using nrf52840 dongle