NRF24L01+ working irregulary

[Fred Lamer]

Hi everyone,

I bought two NRF24L01+ off ebay a couple of week ago and started to work on them this week. I seem to have problem with establishing a reliable communication between both devices. I enabled Shockburst by setting register EN_AA all to "1" and register EN_RXADDR all to "1". I should then have auto-acknowledgement on the TX device. Both device work with the IRQ pin with external interrupt on my two MCU (ATMEGA8) and interrupt are masked with the STATUS register to show what interrupt is trigerred by the NRF. I seem to have a bad communication, but the packet still cross from the TX to the RX irregularly. I checked the value of the received packet and it is the same as the one sent., but no acknowledge received in the TX device...

Any fast thoughts on why it would do this?

Thanks, Fred

[Fred Lamer]

I just discovered that I had strange behaviors in my circuit. I noticed that when my programmer (AVR dragon) was plugged via ISP (In system programming) to program my microcontroler (ATMEGA8), I had roughtly 4% to 5% of datalost. When I unplugged the wire, I got it down to about 0,20% of packet lost. I assume that this problem cause the NRF24L01+ to have difficulty changing from RX to TX mode. I will try to rewrite the code to use Auto-Ack and unplugged my ISP wire and see if this was the problem. I will keep you posted

Fred