nrf24l01+ IRQ current in between retries

RE: nrf24l01+ IRQ current in between retries

debraj — Wed, 29 Oct 2014 00:36:07 GMT

Thanks for the insight.... I also observed that when the ARD value ( time between retries) is kept low, the packet success rate drops in indoor environment, probably because of slow fading nature of the channel. when the ARD value is increased, the PSR value improved. But the cost paid is the time duration when the transmitter is in standby I mode

RE: nrf24l01+ IRQ current in between retries

Asbjørn — Tue, 28 Oct 2014 18:18:12 GMT

So between the TX event and listening for incoming package will be the same as "average current during RX settling" = 8.9 mA. After the RX event if there's been no ACK and after the ARD, it will be the "average current during TX settling" = 8.0 mA. Please see chapter 5.1 of the nRF24L01+ product specification.

In the time after the end of the RX window and before the next TX settling it will be in standby-II mode. Please see Figure 10 on page 35 of the nRF24L01+ product specification.

RE: nrf24l01+ IRQ current in between retries

debraj — Wed, 22 Oct 2014 20:40:25 GMT

In documentation, it also refers to the section with ART:

"nRF24L01+ enters standby-I mode if there is no more untransmitted data in the TX FIFO and the CE pin is low. If the ACK packet is not received, nRF24L01 goes back to TX mode after a delay defined by ARD and retransmits the data. This continues until acknowledgment is received, or the maximum number of retransmits is reached."