Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [nrf52832]

34 questions
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What is this component? What is its purpose?

What is this component? I don't how to search for it. It has only "4 4" written on it; I didn't get any search results from it. Does anyone know what this SMD component is, and what it is used for?
Just doin Gods work
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Flash SPI communication doesn't work without osciloscope

We are using W25Q128JV Flash IC in conjunction with nRF52 SoC. Datasheet of flash: https://www.winbond.com/resource-files/W25Q128JV%20RevH%2003102021%20Plus.pdf We face following issue: SPI communication doesn't work. However if we connect logic…
Elvin Qasanov
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Programming Nrf52832 using Arduino?

Has anyone programmed a bare nrf52832. I have the ebytes e73-2g4m04s1b module. Nordics devzone suggest using segger j link and stuff. But I don't have access to any of those. Can I use Arduino Uno to programme ? Has anyone done it before ? Can u…
binu23
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Arduino analog input read peak-noise

I am using the NRF52832 and code it with arduino. I am reading A0 to get a signal from a sensor at 1m cable length. simulate this circuit – Schematic created using CircuitLab If I disconnect the sensor from the board, the analog input drop to…
Christophe Gudlake
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Buck/boost converter behaviour when MCU is sleeping

I'm building an optical wireless mouse based on nRF52833 and a 16340 cell, I need a sanity check on some considerations regarding the DC regulation. The battery voltage goes from 4.2V when fully charged to 2.5V when fully discharged, so to power the…
StefanoN
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USART stop bit not pulled high during nRF update

I am using an STM32L4 chip that sends an update to the nRF52832 on a ublox module over USART. I assume the nordic chip is in the bootloader during the update. We get a UART error: 4 and when we observe the UART lines we see that on the TX line of…
chat_de_schroedinger
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nrf52-based localization tag flash dump and modification

Lately I've bought a localisation tag (apple airtag alike) When I click a button on my cell phone, the device plays a chiptune-like ringtone. The ringtone is configurable using the app and stored on the tag itself - I confirmed that by comparing…
tomaszu
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Inrush current when n-channel MOSFET turns off

We are using a FDN028N20 n-channel MOSFET for load switching. Load current is 80mA max. and it is controlled via processor's 3.3V pin (NRF52832). Our schematic: When the MOSFET turns off, I measure 6mA current peaks flowing into the processor pin.…
Elvin Qasanov
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How to calculate Pi filter for RF with PCB antenna - Nordic nRF52832

I have finished the layout of a bluetooth beacon based on SoC nRF52832 of Nordic, there is a Pi filter between the IC pin and the antenna that use the AN043 drawing of Texas. AN043: https://www.ti.com/lit/an/swra117d/swra117d.pdf How can I…
abomin3v3l
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Adafruit Feather (Arduino compatible) nRF52 SPI with ADXL345 issues

I’m experiencing some issue in trying to make ADXL345 accelerometer works in SPI by using an nRF52 feather. I'm using the ADXL345 SparkFun library read values from it. Here are the connections nrf52 ADXL345 SCK SCL MISO …
Andrea
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Register 2 peripheral UUID with 1 service, NRF52

I have 3 nrf52 boards: 2 act as peripheral and 1 as central device. I want to register 2 different UUID's for the 2 peripheral devices, which contain the same service (0x0001 - NUS for example). I add UUID's using sd_ble_uuid_vs_add(..) function and…
user2809652
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Initializing MAX 30009 with NRF5340

I have just started working on Initializing MAX 30009 bioimpedance sensor with NRF5340. Since there are no examples or libraries related to max 30009 sensor on any platforms, it has been very difficult for me to initialize it. I tried using sensor.h…
Barsa
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NRF52 - unexpected high power in idle mode

I am trying to program a low-powered Bluetooth Low-Energy sensor using an nrf52810 microcontroller. I am trying to minimize power consumption when the sensor is idle. I have created a minimum code example to demonstrate my issue. This code simply…
ItsAmy
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Help me understand the tStrict rectangular patch in PCB design

I found this circuit reference online for nRF52810. (Git Source here). The example I used of nRF528210 to make some changes. here So, the reference Board has this tStrict part: After doing Copper power, the result of the top and bottom layers is…
Just doin Gods work
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e-Paper display no sharp image

I'm driving an e-Paper display with Adafruit Feather nRF52 Bluefruit LE, code mentioned below but not getting any sharp image. The display starts to get dull as soon as the power goes off. Is there anything I can change in code to retain the…
Just doin Gods work
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