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CES demonstration - Low latency BT LE audio

Hi, In your LE audio presentation from CES that you had a demonstration of a low latency setup with LE audio. We are more curious about the setup you demonstrated so we have two questions: What is the bitrate for the low latency setup? What we are worried about is whether we have to trade audio quality for low latency. Like: High audio quality or bit rate => high latency, low audio quality or bit rate => low latency. The optimum from a pure audio quality point of view would be to have high bit rate Why are you using two separate receivers in the setup you are demonstrating?

forum

1/18/2022

Question about uart configurations for nRF52832 and nRF52840

Dear , I am currently testing the UART peripheral on nRF52832 and nRF52840 using nRF Connect SDK. Basically, I have a sensor that continues sending out data via uart and I would like to use the uart peripheral to receive and parse the data packets. I checked the sample code provided as lpuart, but still have a few questions. In the devicetree setup for the uart, there are REQ pin and RDY pin. Are these pins always compulsory for using lpuart? Can I use uart without configure these two pins, i.e. using only tx and rx pins? As to the application I mentioned above, how can I set up an interrupt-driven process which will analyze each incoming byte once it's received? If you could kindly provide a few advice and directions, it will be very helpful. Thank you so much for your help and assistance. Kind regards, Kevin

forum

1/18/2022

nrfutil (nRF52840) for windows 11

Hello, I just recently updated to Windows 11 and facing the issue(nrfutil is not working) after win11 update. Do you have the working nrfutil for Windows 11? Additional Details, OS version : Win11 (64 bit) nrfutil version : 5.2.0 Python version : 3.7.0 Regards, Mani

forum

1/18/2022

Vendor model server message receiving problem

( https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.meshsdk.v1.0.1%2Fmd_doc_getting_started_how_to_models.html) I created a vendor model by following the instructions given in the link.For messages received on the server side, handle_set_cb is called twice and it looks like two messages were received.When I assign numbers to the packages, a message sent from the client is displayed twice on the server. What could be the reason? what am i missing?

forum

1/18/2022

Change the Device Name via a Name Stored in the UICR register

Hello, I'm trying to implement a set up of the ble device name from the NVMC UICR register. But when I try to take it from the register and to set it has a name, it doesn't work very well. I think this is an issue about the utf-8 encoder of the ble device name. Here's my code: 1) Write the device name only if it wasn't done before. static void write_name () { uint32_t* deviceName = (uint32_t*)&NRF_UICR->CUSTOMER[0]; if (*deviceName == 0xFFFFFFFF){ ret_code_t err_code; err_code = nrf_sdh_disable_request(); APP_ERROR_CHECK(err_code); NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Een READY == NVMC_READY_READY_Busy){} NRF_NVMC->ERASEUICR = NVMC_ERASEUICR_ERASEUICR_Erase; NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren READY == NVMC_READY_READY_Busy){} NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen READY == NVMC_READY_READY_Busy){} uint8_t* name = "WAW-TEST"; NRF_UICR->CUSTOMER[0] = 0xFFFFFFFF & *name; NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren READY == NVMC_READY_READY_Busy){} NVIC_SystemReset(); } } 2) set the ble device name static void gap_params_init() { ret_code_t err_code; ble_gap_conn_params_t gap_conn_params; ble_gap_conn_sec_mode_t sec_mode; BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode); uint32_t* deviceName = (uint32_t*)&NRF_UICR->CUSTOMER[0]; uint8_t

forum

1/18/2022

CONFIG_MCUBOOT_IMAGE_VERSION from external file

Hello I Have to set: CONFIG_MCUBOOT_IMAGE_VERSION from value defined in external header file. is this even possible?

forum

1/18/2022

nRF21540-dk PCA10112 hex file for nRF Connect Direct Test Mode

Dear nRF, I have couple of nRF21540-dk boards (PCA10112) in my hand. I would like to use nRF Connect Direct Test Mode to activate TX and RX. I found that the tool lacks correct hex file for PCA10112. If I activate TX, there is no practical RF power present at the test connector, measured with NRP-Z21. I assume that there is no TX / RX configuration done for the external FEM. Could you advise where I can get the correct hex file? My nRF Connect is version 3.9.3. Fast response is very much appreciated. Thanks.

forum

1/18/2022

Secure vs Non-Secure Build for Modem Firmware Update(NRF9160, Zephyr RTOS)

Hi, I'm working on nRF9160 modem firmware update. I have used nRF9160: Full modem firmware update using SMP Server demo and compiled it for nRF9160dk board. While compilation, I received an error of non-secure firmware must be need to compile nrf_modem_lib in demo example. Therefore to update modem, must use non-secure board only to compile SMP server demo for nRF9160 board. Question: 1) Can I perform DFU of modem in nRF9160 board without non-secure image ? 2) Why nrf_modem_lib need non-secure board and not working with secure board ? 3) What is the difference between secure vs non-secure build ? 4) How can I use nrf_modem_lib for nRF9160 secure board ?

forum

1/18/2022

BLE example for custom board with NRF52820 and no 32Khz xtal

Hello all, This is my first project using Nordic chips and my first project using BT. A lot of firsts :) I have made a custom board using nRF52820 chip. The board is 4 layer 0.8mm thick board 80mm x 50mm. I have used the PCB manufacturer's calculator to set the trace with for the 50 ohm impedance. The antenna I am using is Johanson Technology 2450AT43A100E. I do not have low frequency xtal on the board. You can see may schematics and the layout I have used for this board bellow. Layout Schematic I am programming the board using nRF52833-DK. So far I got SPI, TWI and USB to work on the board, but I am struggling with the RF part. For my base project I am using the "usbd_ble_uart". I can successfully connect and RX/TX data using my phone and the DK. I have looked at questions

forum

1/18/2022

please clarify UART / UART0 in SDK

in sdk_config.h it says this // NRFX_UART_ENABLED - nrfx_uart - UART peripheral driver //========================================================== #ifndef NRFX_UART_ENABLED #define NRFX_UART_ENABLED 1 #endif // NRFX_UART0_ENABLED - Enable UART0 instance #ifndef NRFX_UART0_ENABLED #define NRFX_UART0_ENABLED 0 #endif on page 24 of the nRF52832 datasheet, it seems that UART and UARTE cannot both be used (they share the same ID). Is this correct? effectively only one UART on this device? and then what do UART and UART0 refer to in the sdk config? thank you

forum

1/18/2022