IRQ pin stay low after several hours of use

[Snyfir]

I have an arduino pro mini 5V connected to an nrf24l01+

my code is

#define MY_DEBUG
#define MY_RADIO_RF24
#define MY_RX_MESSAGE_BUFFER_FEATURE
#define MY_RF24_IRQ_PIN (2)
#define MY_REPEATER_FEATURE

#include <MySensors.h>

MyMessage msg(0, V_CUSTOM);

void setup()
{
}

void presentation()
{
	sendSketchInfo("Test", "1.0");
	present(0,  S_CUSTOM);
}

void loop()
{
}

void receive(const MyMessage &myMsg)
{
	if (myMsg.type == V_CUSTOM && myMsg.sensor == 0) {
		send(msg.set(F("pong")));
	}
}

i send every minute a message to the node. But after some time the node is not responding.
When i check the IRQ pin in the arduino (pin 2) and the nrf24l01+, this one is low. It means the nrf24l01+ has been received the last message but the interrupt has not been trigger.

How can i fix this issue ? do you have a clue ?

Thank you for your help

[Snyfir]

When reception is not working, the status register value is 0x40, so RX_DR stay set.
I think the clear of RX_DR is not working very well. i will try to add

RF24_setStatus(_BV(RF24_RX_DR))

at the end of RF24_irqHandler function

[Snyfir]

@snyfir
with this fix, everything work fine :smiley: