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I'm using the nRF52840 and have all sorts of problems trying to using dynamic memory allocation.
I'm trying to develop on an example project from
./examples/ble_peripheral/ble_app_uart. Firstly I had to modify the project because ... (more)
I am working on S140 on nRF25840. I am using the ble_app_beacon sample.
I want to set the advertising interval smaller than 100ms while using non-connectable mode. But the
BLE_GAP_ADV_NONCON_INTERVAL_MIN stops me. I wonder if there is any reason to ... (more)
I am currently trying to make an MSD RAM disk with nrf52840 nRF5_SDK_14.0.0 with O0 optimization level. And had no success. For some reason in Keil example O3 is used. If I set O0 then it stops ... (more)
I'm trying to create a footprint for the NRF52840, and I can't find a layout specification for this package. I'm able to find a mechanical drawing here:
But this is insufficient as ... (more)
With the nRF52840 S140 SDK 13, does BLE encryption use the Cryptocell?
SDK Version: 13 Alpha
I've been able to track down, through app_uart.h, where UART interrupt priorities are set using NVIC_SetPriority(). Now I'd like to know where interrupts are mapped to there associated handler.
I have already fruitlessly ... (more)
I am evaluating the USB audio example from SDK v14 with an nRF52840-Preview-DK (PCA10056, V0.9.2, 2017.25).
SW9 is set to VDD power, SW6 is set to DEFAULT. The board is connected over both USB connectors to ... (more)
Connection interval (both min & max) = 10ms
ATT_MTU size: 52 bytes
Dle: 52+4 bytes
Connection event extension: enabled
Slave latency: 0
Connection supervision timeout: 4s
I'm transmitting 10 samples wrapped ... (more)
I'm trying to run two UARTs out of my NRF52840. Do you have an example in which both SoftDevice UARTs are used? The Nordic Infocenter SDK 14.0.0 documentation lists one of the advantages of the new serial ... (more)
I'm using Ceedling, Unity + CMock to implement unit tests but I'm running into issues when it comes to mocking nrf_drv_gpiote.h.
I'm trying to test a file, call it foo.c, which includes nrf_drv_gpiote.h, therefore ... (more)
In the file app_sdcard.c of the SDK13.0.0, an assert is done when calling
app_sdc_init() with a pin P0.0. Can i safely use P0.0 with the assert deactivated or should i use another pin ?
I'm developing multiprotocol applications based on examples from Thread SDK: Proximity/CoAP server and BLE UART/CoAP client. All CoAP communication in this examples is initiated from client by sending requests, but I'd like to have a ... (more)
Hello, I'm working on a concurrent role device (advertiser+scanner+peripheral+central) and devices are configured to connect each other in a mesh-like way (Note: I'm not using BLE MESH!). I noticed that the connection events seems to ... (more)
The SoftDevice uses the GPIO pin and port abstraction to configure and control IO's. When developing in Thread, how does one access and control the nRF52840 GPIO's using the Thread SDK?
I would like to order Li-Po batteries for my nRF52840 development kits and need some information. From the battery, what type of female battery connector is needed to plug into the board?
I'm supplying a DK with an external battery source plugged into J6 (Li-Po) and the nRF power source switch set to VDD. When I flash the chip with one of the Openthread client examples, the DK operates normally ... (more)
Hello, I have an error while building the project "ble_app_hrs_rscs_relay_pca10056_s140" with sdk14.0.0 on segger embedded studio 3.26 and gcc/clang.
When compiling nrf_atfifo.c, is says "variably modified 'do_assert' at file scope", and I'm redirected to ... (more)
Hi, I have used nRF52840-PDK. And I want to test profile and protocol with PTS. I succeeded in GATT-based service test and GATT test with PTS.
But when I try to L2CAP test, PTS makes message and doesn't conduct ... (more)
I'm developing an application for nrf52840 that's essentially based on both the USB MSC example and the BLE NUS example in SDK 14. I started with the USB MSC example, wrote a block device driver so I ... (more)
I am trying the Thread Cloud COAP Client
on a NRF52840 PDK. I'm using Thread SDK v0.10.0. The example works as described.
However, when I unplug the board from USB, it ... (more)
We are using a nRF52840 (QIAAAA) on a custom board which replicates exactly the schematic used by the development kit (PCA10056). When using Segger RTT for debugging purposes, the board does not emit any BLE packets (no errors are reported ... (more)
I'm using a PCA10056 (NRF52840 Preview DK) v0.9.1, and trying to erase the existing firmware, but running into issues.
nrfjprog -f NRF52 --eraseall with version 9.6.0 of the NRF Tools and version ... (more)
I'm trying to use ble_app_hrs_rscs_relay_pca10056_s140 on a nRF52840 Preview DK using example from SDK 13.0.0_04a0bfd.
When I copy the precompiled .hex file in the file explorer, everything is fine.
I have an issue when I try ... (more)
In the nRF52840 Objective Product Specification, there is 4 PWM in the key features but only 3 in the beginning of the PWM chapter.
I'd like to use nrfjprog to read contents of QSPI external memory. (I'm using an nRF52840-QIAA on a custom PCB, based on the PDK.)
Using application firmware I am able to successfully read and write to my external ... (more)
Hi, On my single I2C Bus, I have interfaced 4 I2C slave devices.. Now my voltage level of this bus behaves randomly. sometimes It shows 3.3V, but most of the times It stays 1.6V, due to this 2 ... (more)
I'm busy exploring the
ble_peripheral_uart example and ran into a couple of issues I don't fully understand. Upon flashing the S140 SoftDevice and application program to the nRF52840, the following is observed:
1.) The advertising LED ... (more)
I modified the HTS service to send notifications and read property at the peripheral. It notifies the simulated temperature every 1 sec in Celsius type. I tried writing HTS service at the central to receive the notifications similar to battery ... (more)
This post is more about some suggestions for review rather than a question.
I've been looking at implementing a project using the nRF52840, SDK 14.0.0 and FreeRTOS in a low power application. The release note for SDK ... (more)
I'm transmitting data packets each of 48 bytes in the form of notifications using Bluetooth 5.0. When I observed the logs over sniffer, I see that the packets are fragmented which is shown as CRC errors and L2CAP ... (more)