It is solved. Supplying it through battery is OK, supplying it from +5V Vusb pin causes 4mA consumption.
I am already working on my application.
Good for you.
The on-board battery charge controller consumes a lot of current when powered from the 5V pin or USB connector.
Looks like, yes, still, can’t fathom how that chip managed to consume 4mA. Yet here we are, Thanks for idea!
According to the datasheet, the current consumption of the charge controller BQ25100 is 0.75mA.
There may be other causes for the 4 mA.
edit
When the battery is not connected, the charging terminal falls below 4.2V, so the BQ25100 attempts to charge the battery until it reaches 4.2V. The operating current at this time would be about 4 mA.
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Heyy guys
facing an issue observe 5 spikes every 100ms from 2uA to 23uA unable to understand whats the issue
i tried multiple ways , those didnt worked i cimmented them
here is following snipet
//----------------------------------------------------------------------------------------------
// BSP : Seeed nRF52 Borads 1.1.1
// Board : Seeed nRF52 Boards / Seeed XIAO nRF52840 Sense
// important : need for Serial.print() <Arduino.h> <Adafruit_TinyUSB.h>
// \Arduino15\packages\Seeeduino\hardware\nrf52\1.1.1\libraries\Bluefruit52Lib\src
//----------------------------------------------------------------------------------------------
// 2023/07/07
// Central sketch : nRF52_XIAO_LightSleepAdvScan_central.ino
// Need to be deleted /Documents/Arduino/libraries/SdFat
#include <nrf_rtc.h>
#include <Arduino.h>
//#include <Adafruit_TinyUSB.h> // For Serial.print()
#include <bluefruit.h> // \Arduino15\packages\Seeeduino\hardware\nrf52\1.1.1\libraries\Bluefruit52Lib\src
#include <Adafruit_SPIFlash.h> // Need to be deleted /Documents/Arduino/libraries/SdFat
#define SLEEP_TIME 30 // Sleep time [sec]
//#define SLEEP_TIME 30 // Sleep time [sec]
Adafruit_FlashTransport_QSPI flashTransport;
//uint8_t timeout = 5;
void setup() {
// Serial port initialization
//Serial.begin(115200);
//while ((!Serial) && (timeout)){
// delay(1000);
// timeout–;
// Enable DC-DC converter
NRF_POWER->DCDCEN = 1; // Enable DC/DC converter for REG1 stage
// Sleep QSPI flash
flashTransport.begin();
flashTransport.runCommand(0xB9); // enter deep power-down mode
flashTransport.end();
//NRF_UART0->ENABLE = 0; // Disable UART
//NRF_SPI0->ENABLE = 0; // Disable SPI
//NRF_TWI0->ENABLE = 0; // Disable I2C
//Bluefruit.Advertising.start();
//Bluefruit.Advertising.stop();
//RTC initialization
initRTC(32768 * SLEEP_TIME); // SLEEP_MTIME [sec]
SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;
// Initialization of Bruefruit class
// Bluefruit.begin();
//Bluefruit.setTxPower(4); // Check bluefruit.h:151 for supported values
//Bluefruit.autoConnLed(false); // turn off LED to save power Sleep Current 4uA
// Bluefruit.setConnLedInterval(50); // Should not be used, Sleep current 300uA
suspendLoop();
// Serial.println(“End of initialization”);
}
//*************************************************************************************************************
void loop() {
// Bluefruit.Advertising.stop();
//delay(5000);
//digitalWrite(LED_BLUE, LOW); // turn the LED on (HIGH is the voltage level)
//delay(5000); //Led on // light for 5 seconds, but the rtc in the background keeps running. → light off only for 25 seconds
//digitalWrite(LED_BLUE, HIGH);
//enterLowPowerState();
// delay(SLEEP_TIME * 1000);
// Sleep
__WFI();
__SEV();
__WFI();
// System ON Sleep by FreeRTOS
}
//**************************************************************************************************************
// RTC initialization
void initRTC(unsigned long count30)
{
// See “6.22 RTC - Real-time counter 6.22.10 Registers”
NRF_CLOCK->TASKS_LFCLKSTOP = 1;
NRF_CLOCK->LFCLKSRC = 1; // select LFXO
NRF_CLOCK->TASKS_LFCLKSTART = 1;
while(NRF_CLOCK->LFCLKSTAT != 0x10001)
NRF_RTC2->TASKS_STOP = 1; // stop counter
NRF_RTC2->TASKS_CLEAR = 1; // clear counter
NRF_RTC2->PRESCALER = 0; // set counter prescaler, fout=32768/(1+PRESCALER) 32768Hz
NRF_RTC2->CC[0] = count30; // set value for TRC compare register 0
NRF_RTC2->INTENSET = 0x10000; // enable interrupt CC[0] compare match event
NRF_RTC2->EVTENCLR = 0x10000; // clear counter when CC[0] event
NVIC_SetPriority(RTC2_IRQn,3); // Higher priority than SoftDeviceAPI
NVIC_EnableIRQ(RTC2_IRQn); // enable interrupt
NRF_RTC2->TASKS_START = 1; // start Timer
}
//**************************************************************************************************************
// RTC interrupt handler
extern “C” void RTC2_IRQHandler(void)
{
if ((NRF_RTC2->EVENTS_COMPARE[0] != 0) && ((NRF_RTC2->INTENSET & 0x10000) != 0)) {
NRF_RTC2->EVENTS_COMPARE[0] = 0; // clear compare register 0 event
NRF_RTC2->TASKS_CLEAR = 1; // clear counter
//intFlag = true;
//digitalWrite(LED_RED, LOW);
//delayMicroseconds(10000); // for LED
//digitalWrite(LED_RED, HIGH);
}
}
following is ouput observed on PPK
@PJ_Glasso @iggzzzz @daCoder @hobbya @1melc @msfujino
I think the DC/DC converter may be working.
Please use </> when you post your code.
For example, if you want XIAO to wake up every 30 seconds, you should write delay(30000); instead of using RTC, which will reduce the sleep current.
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