[SOLVED] NRF24 can not sleep

[Pavel Polititsky]

Hi
Several days im trying to build radio button using example for binary switch
But at final I got the trouble with power consumption by NRF24
328P was sleeping well and take only ~0.2uA. But NRF24 module still powered up with current ~800uA (sometimes 15mA, by chance) This current was measured on the power pin of NRF
So, how to force it to sleep?
Thx

My code:

// Enable and select radio type attached
#define MY_RADIO_NRF24
//#define MY_RADIO_NRF5_ESB
//#define MY_RADIO_RFM69
//#define MY_RADIO_RFM95

#include <MySensors.h>
#include <avr/sleep.h>

#define SKETCH_NAME "Binary Sensor"
#define SKETCH_MAJOR_VER "1"
#define SKETCH_MINOR_VER "0"

#define PRIMARY_CHILD_ID 3
#define SECONDARY_CHILD_ID 4

#define PRIMARY_BUTTON_PIN 2   // Arduino Digital I/O pin for button/reed switch
#define SECONDARY_BUTTON_PIN 3 // Arduino Digital I/O pin for button/reed switch

#if (PRIMARY_BUTTON_PIN < 2 || PRIMARY_BUTTON_PIN > 3)
#error PRIMARY_BUTTON_PIN must be either 2 or 3 for interrupts to work
#endif
#if (SECONDARY_BUTTON_PIN < 2 || SECONDARY_BUTTON_PIN > 3)
#error SECONDARY_BUTTON_PIN must be either 2 or 3 for interrupts to work
#endif
#if (PRIMARY_BUTTON_PIN == SECONDARY_BUTTON_PIN)
#error PRIMARY_BUTTON_PIN and BUTTON_PIN2 cannot be the same
#endif
#if (PRIMARY_CHILD_ID == SECONDARY_CHILD_ID)
#error PRIMARY_CHILD_ID and SECONDARY_CHILD_ID cannot be the same
#endif



// Change to V_LIGHT if you use S_LIGHT in presentation below
MyMessage msg(PRIMARY_CHILD_ID, V_TRIPPED);
MyMessage msg2(SECONDARY_CHILD_ID, V_TRIPPED);

void setup()
{
	// Setup the buttons
	pinMode(PRIMARY_BUTTON_PIN, INPUT);
	pinMode(SECONDARY_BUTTON_PIN, INPUT_PULLUP);
}

void presentation()
{
	sendSketchInfo(SKETCH_NAME, SKETCH_MAJOR_VER "." SKETCH_MINOR_VER);
	present(PRIMARY_CHILD_ID, S_DOOR);
	present(SECONDARY_CHILD_ID, S_DOOR);
}

void wake ()
{
  // cancel sleep as a precaution
  sleep_disable();
  // precautionary while we do other stuff
  detachInterrupt (0);
}  // end of wake

// Loop will iterate on changes on the BUTTON_PINs
void loop()
{
	uint8_t value;
	static uint8_t sentValue=2;
	static uint8_t sentValue2=2;

	sleep(5);

	value = !digitalRead(PRIMARY_BUTTON_PIN);

	if (value != sentValue) {
		// Value has changed from last transmission, send the updated value
		send(msg.set(value==LOW));
		sentValue = value;
    sleepNow(); // sleep function called here
	}
  
  sleepNow();
  }
  

void sleepNow() // here we put the arduino to sleep
{
   ADCSRA = 0;  
  
  set_sleep_mode (SLEEP_MODE_PWR_DOWN);  
  sleep_enable();

  noInterrupts ();
 
  attachInterrupt (0, wake, RISING);
  EIFR = bit (INTF0);  // clear flag for interrupt 0
 
  // BODS must be set to one and BODSE must be set to zero within four clock cycles
  MCUCR = bit (BODS) | bit (BODSE);
  // The BODS bit is automatically cleared after three clock cycles
  MCUCR = bit (BODS); 
 
  interrupts ();  // one cycle
  sleep_cpu ();   // one cycle

  } // end of loop

[mfalkvidd]

@pavel-polititsky Mysensors has a built-in sleep function, that will turn off the nrf24. Use that and throw away all the complicated code ;-)

[Pavel Polititsky]

It is just result of my experiments, builtin mysensors sleep function works the same. Also 800uA to NRF
I' ve cheked right now. NRF consuming ~800uA in all examples.
Its not posible to use battaries power

[mfalkvidd]

@pavel-polititsky there have been a few cases where people have purchased bad nrf24 clones that wouldn't go to sleep properly. Maybe you stumbled on that variant.

[Pavel Polititsky]

@mfalkvidd it's possible... :smirk:
But in this case I want to know exactly how much consumes original module with any example... Then I will try to replace several modules.

[mfalkvidd]

@pavel-polititsky 900nA (yes nA, not µA)

[Pavel Polititsky]

@mfalkvidd :astonished: Another module just fu...g works. Great thx!

[maghac]

@mfalkvidd How do you measure such low currents? I have the problems with some nodes that are consuming way too much power and I'd like to check them.

[mfalkvidd]

@maghac I don't. But the most accurate way seems to be to get a uCurrent gold.

[Pavel Polititsky]

@maghac Im using mastech MY65 and I can measure ~0.1uA minimal current with some error