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I am writing a program in Keil whereby I have to send a large amount of data through BLE notification in real time. The program works by having two timers, one timer is used for the ADC to ... (more)
Hi there, I was trying out the ADC example which is sampling 10 times the ADC and then generating the event NRF_DRV_ADC_EVT_DONE to process the data. I extended the handler function to also react to event NRF_DRV_ADC_EVT_SAMPLE. But this does ... (more)
https://github.com/NordicSemiconducto... I have flashed the above program in the link on to my nrf51822 DK. I can see the values of the samples but i do not understand what the output is. The analog pin that is ... (more)
I'm currently developing an application on nrf52832 that'll use SAADC low power to fetch battery voltage level and report that value on BLE advertising data. I've adapt github example nFRF52-ADC-examples to the following:
#define REFERENCE_TO_MV 0 ...
Hi - In my app, I'm using Bluetooth, the ADC, the TWI, and the SPI. The general idea is to measure lots of things, store the data in SPI NOR FLASH, and occasionally flush some data through BLE. All is ... (more)
I'm starting to work with a new ADC that I need to drive with an external 4MHz clock that I will need to drive with my MCU. Is there a way to set up a pin to passively ... (more)
This is for the nRF51822.
I have done some tests where I configure a pin as input with pull up enabled and then reconfigure the pin for an adc measurement with 1/3 prescaler with band gap reference.
It looks ... (more)
Hello, I'm using nRF51822-mKIT for a research.
I recently posted a question related to "reading ADC value from analog input", having issues with reading proper ADC value from input pin. However, after narrowing down, I have found out that ... (more)
Hardware: nrf52 DK Software: SDK v13
I want to use SAADC to sample some analog data (main function of my device), but It seems to be noisy. In attachment spreadsheet with chart and recorded data.
Reference = VDD/4, input = VDD ... (more)
I am making a device which involves using nfr52832(PCA10040) to communicate with a NAND flash through spi to store data acquired from the ADC. After all the data has been stored, the device is then plugged into ... (more)
In this app by Nordic
a cyclic redundancy check (CRC) is added to the payload byte array before writing it to the UART receiving characteristic.
Is the CRC necessary? Doesn't the BLE stack add ... (more)
I am using nrf51822 SDK11 S130. I am using my custom design board which is powered by 12V. The nrf51822 is provided with 3.3V. I used 27k and 9.53K resistors in potential divider configuration and the node ... (more)
AD value and voltage conversion between the calculation formula
adc_config.resolution = NRF_ADC_CONFIG_RES_10BIT; adc_config.scaling = NRF_ADC_CONFIG_SCALING_INPUT_ONE_THIRD; adc_config.reference = NRF_ADC_CONFIG_REF_VBG; nrf_adc_configure(&adc_config);
I hope someone can point me in the right direction.
We've customised an NRF51822 beacon and made it into a sensor but there seems to be an strange error, I'm a bit lost as to where ... (more)
Hello, I tryed to find in Q&A something that can help me understand how it is possible to measure battery voltage with nRF52, but i am not sure i found the exact explanations. I am using primary 2xAAA cell ... (more)
I developed an application for the nrf51822 Smart Beacon, SDK11 s130, that basically advertises the battery lvl of the beacon, the staus of button_1 and the number of times that button_1 was released. For handling the button events I ... (more)
I'm writing an application that uses the SAADC and would like to set up a high limit to trigger on.
If I use the following code, I'm able to trigger 1 ADC sample successfully:
errCode = nrf_drv_saadc_buffer_convert( &adcValue ...
Currently, we are trying to have the nRF51 chip working with a type of capacitive pressure sensor. We did quite a lot of work on searching proper circuits of reading the capacitance of the sensor, including capacitance voltage divider, charging ... (more)
I am using SDK 12.2.0 with soft device s132 3.0.0 using NRF52 Development Board(PCA10040).
I want to update Battery level to central device/APP.As i want to use code for my custom Board i ... (more)
Is enable required before configuration? Does toggling NRF_ADC->ENABLE reset the configuration (like it does for the radio?) Is the power to the ADC automatic, so that even if enabled, it might be quiescent current?
The product spec, register description ... (more)
Hello developers, I am trying to integrate ADC, TWI based MPU6050 for accelrometer with ble_nus service for data transmission. The ADC and MPU6050 works perfect but once I integrate ble_nus the code compiles but my NRF51 DK does not advertise ... (more)
I am getting some error in my SAADC measurements and I believe it's due to the R_INPUT forming a parallel resistance with my voltage divider at the input (the voltage divider is meant to scale down the ... (more)
hello,i am using nrf52 DK.I was testing ADC example code .I am giving acq time is 3microsec .I want to find the total time is taken to sample adc for one sec.In data sheet if acq time ... (more)
some time ago I was struggling with interfacing an I2S microphone with the nRF52832. That remained unsuccessful. My conclusion back then was that the selected I2S microphone and the nRF52832 were incompatible (the mic wanted 32-bit word size, which ... (more)
Using existing examples in SDK13, I prepared ADC sampling app which works fine in ESB TX mode. Works well sending frames at 10ksps, and I can also put it to 'standby mode' by remote command from RX, when it wakes ... (more)
I have a sensor which has output in the range of 0-5V. I want to connect it to an nrf51822 GPIO pin and to be able to read the value via it's 10 bit ADC. Is there any guide ... (more)
Is there any data about power consumption of NRF52 when it is receving data from other device ?
I have an iot/coap environment setup and i want to read input voltage connected to p0.01.I can read the input in terms of resolution(0-1023).I can convert this values to voltage(0-3).I want to read ... (more)
I am using nRF52 pca10400 and I would sample some audio signal for short periods of time, but I found a lot of difficulties with the SAADC example from sdk 13, since if I put a value greater than 126 ... (more)
Hey, I am trying to sample from 10 analog sensors and stream the results via bluetooth. Since the nRF5 is on a board that only lets me access 5 Pins, I am using a 16:1 multiplexer connected to a ... (more)