Hi,
While pushing the NRF24 radio I've encoutered a strange bug which seems to delay write's significantly (~100ms). Not sure if this is some sort of race condition.
I define retries as two attempts with a gap of 500us.
radio.setRetries(1,1); //delay(microseconds (n+1)*250, count)
To test I've assigned two timers, one before the write loop, one after. Loop serves as a rough signal quality indication.
test1 = millis();
while(ack_rec == false && count < 10)
{
ack_rec = radio.write(serialIN, 5);
count += 1;
}
test2 = millis();
Highlighted in blue is the time difference (ms) from before writing radio data to sending data back across USB [test1], highlighted in red is the time difference (ms) from after writing to sending data back across USB [test2]. Hence ~1 second is used in the write here. More testing showed that a loop of 1 iteration had ~100ms delay, hence delay is cumulative with iterations. Also worth mentioning is that every "slow" response failed to receive any ack.
[ATTACH1]
However in what should be a worst case scenario with receiver unplugged gives a ~35ms delay.
[ATTACH2]
Any ideas what might cause the radio.write to suddenly, and occasionally, take ~100ms per write?
Cheers.
