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Google Thread protocol vs. BLE Mesh

Hi Nordic team I am skilled in BLE Mesh and developed BLE mesh at several projects. At BLE mesh, 1. Provisioner was hard-code consistent. It could be smartphone with nRF Mesh apps or standalone solution as a Nordic chip. 2. Provisionee broadcasted unprovisioned beacon to let provisioner find it and add it to this network. Then, this provisionee become a node in this network. 3. Provisioner can configure models of every node in order to divide all nodes in network into several groups. Then, client node can control multi server nodes in same group. My questions about Thread Q1. Tested COAP client and COAP server, client can send multicast message to all FTDs/MEDs. Or, single paired between client and one server, client can send message only to paired server. If we want group division same as BLE mesh, can Thead make it? Through which interface to manually configure it? As

forum

12/1/2022

Can sd_ble_gap_data_length_update return NRF_ERROR_BUSY if I only use it in response to a BLE_GAP_EVT_DATA_LENGTH_UPDATE_REQUEST?

I'm not totally clear from the SDK documentation on when I can expect NRF_ERROR_BUSY from sd_ble_gap_data_length_update(). Would it happen in the case where both sides attempted to do sd_ble_gap_data_length_update() at nearly the same time? If I see a sd_ble_gap_data_length_update(), would I expect to soon receive a BLE_GAP_EVT_DATA_LENGTH_UPDATE_REQUEST? If I only do sd_ble_gap_data_length_update() in response to BLE_GAP_EVT_DATA_LENGTH_UPDATE_REQUEST, can I expect to never see NRF_ERROR_BUSY? I am using s132 v5.1.0.

forum

12/1/2022

JLink disappeared on NRF52840DK after use

Hi, my PC stopped detecting the JLink debugger on my NRF52840DK board. This happened after I accidentally flipped the NRF only switch while I was handling the board. I have tried following the instructions from https://devzone.nordicsemi.com/f/nordic-q-a/24592/my-nrf52-nrf51-dk-kit-doesn-t-work/96836#96836, but I was not able to carry out step 4, as LED5 still blinks quickly when I power cycled the board while holding IF/RESET button. The BOOTLOADER drive does not apear on my computer either. I was able to verify that the NRF52840 SoC itself was functioning, as I could access the openThread CLI through the USB port. Also, JLink Commander updated the firmware of the on board debugger while I was flashing a program. However, I am not sure if this is relevant. Any help would be appreciated.

forum

12/1/2022

NCS Power Management

Some clarification on Power Management using NCS/Zephyr, please, for present and future use: 1. There is System PM and Device PM. 2. System PM is associated with the processor. When the main thread (and all other threads) end (yield or sleep) and the idle thread runs, the processor core is stopped. If CONFIG_PM is enabled, before stopping, the processor core is configured for low-power state, which is apparently "SystemOn Idle"; that is, either PM_STATE_RUNTIME_IDLE or PM_STATE_SUSPEND_TO_IDLE. 3. By default (or if CONFIG_PM_POLICY_DEFAULT is enabled), no other attention to managing the system power savings is required. If CONFIG_PM_POLICY_CUSTOM is enabled, the API can/must be used to handle power savings under direct program control. 4. The nRF52840 (and other nRF52, and maybe other nRF5) can turn off all/part of RAM for further power savings. There's no mention of this in the Zephyr docs, but if CONFIG_APP_RETENTION is enabled, nrfx library resources can

forum

12/1/2022

GFX Library print fucnction

Hollo Im using the GFX example, want to print string and to clear the screen , i use screen_clear(); function, this is default function gfx example this is the loop can be so fast? devzone.nordicsemi.com/.../WhatsApp-Video-2022_2D00_11_2D00_30-at-3.08.43-PM.mp4 do i need to implement a buffer? or whats is the problem? thanks a regards

forum

11/30/2022

Asset Tracking with Fanstel SE840F-210

I am evaluating Nordic nRF52840 Development Kit and a test tracking device from Fanstel SE840F-210. Can I use these for Asset Tracking with Apple Find My network? I work for U-Haul in their U-Box software development area. I need to track thousands of U-Boxes, but we can't use AirTag, so we need to develop our own. The Fanstel SE840F-210 seems to be a Temperature and Humidity sensor, but I thought I could use it for Asset Tracking the location of our U-Boxes. Or do I need a different device?

forum

11/30/2022

9160 Resetting

Developing on nrf9160 using NCS 2.1.2 and MFW 1.3.3, is there any sort of Hard Fault detection and handler besides the k_sys_fatal_error_handler hook in lib/fatal_error/fatal_error.c ? We're seeing resets again on a non-secure build for the nrf9160 that don't hit the error handler (which in this case, is overwritten by Nordic), so we don't get any information about the reset besides the reset reason being 0x00010000, which is AIRCR.SYSRESETREQ , but isn't coming from the error handler? I've looked through the documentation, but don't see a list of everything that can cause that. Could it be the modem setting a reset? This has proven difficult to resolve since it isn't coming through the error handler, so there is no information beyond the reset reason register.

forum

11/30/2022

Connect the nRF5340 DK to a MAC computer

using a MAC computer I cant see the nRF5340 DK under the "CONNECTED DEVICES" tab in the visual studio code workspace. any suggestions why?

forum

11/30/2022

Setup network connectivity to nRF5340DK

Hi, I wanted to setup a network connectivity to nRF5340DK to send RPC messages to remote server(Blockchain Network). Already I tried to setup OTBR using RPi and nRF52840 dongle and I was able to establish network connectivity between the devices but was not successful in establishing connection to remote server. Now I connected my nRF5340DK(flashed with nrf Thread:CLI sample) to RPi, just to replicate the same setup as OTBR using RPi and nRF52840 dongle. But when I check the otbr-agent status I could see below issue. `[email protected]:~ $ sudo service otbr-agent status ● otbr-agent.service - OpenThread Border Router Agent Loaded: loaded (/lib/systemd/system/otbr-agent.service; enabled; vendor preset: enabled) Active: activating (start-pre) since Wed 2022-11-30 14:15:24 CET; 2s ago Cntrl PID: 4396 (systemctl) Tasks: 1 (limit: 4915) CPU: 57ms CGroup: /system.slice/otbr-agent.service └─4396 systemctl start mdns.service Nov 30 14:15:24 pi systemd[1]: Starting OpenThread Border Router Agent... Nov 30 14:15:26 pi systemd[1]: Started OpenThread Border

forum

11/30/2022

Distance Measurement library questions (part 2)

I came across a document called 2870.Measuring_distance_with_Nordic_Distance_Toolbox_slides.pdf (found here Measuring distance with the Nordic Distance Toolbox webinar slides ) Several questions 1. There are 2 slides for "High Precision" - I assume this means that nrf_dm_high_precision_calc function was used - can you confirm? How does this map to the dm_result.dist_estimates? ( in dm.h) I assume it's mspd.best- can you confirm that? 2. What "Median 3 Filter" was used ? Can you point to the source code? 3. in dm.c the code calls nrf_dm_calc when the data arrives. How can I call nrf_dm_high_precision_calc instead? There is no hook or parameter in dm.c. to do that Thank you

forum

11/30/2022