Frequency drifting on nRF24L01+

RE: Frequency drifting on nRF24L01+

Peter — Wed, 02 Jul 2014 23:20:09 GMT

If I setup 5 receivers with flashing LED's to indicate a correctly received packet, I can see that receivers will sometimes not acknowledge transmissions evenly. These "dropped packets" are seemingly random amongst the 5 receivers. This seems to indicate that the tuning of the transmission changes sometimes with each transmission (within seconds of each-other)? Could this be a result of the RF tuning circuitry?

RE: Frequency drifting on nRF24L01+

Peter — Wed, 02 Jul 2014 23:15:32 GMT

We can confirm that the VDD_PA pin is being asserted and therefore it is transmitting. This happens on several boards with different chip markings.

RE: Frequency drifting on nRF24L01+

Peter — Fri, 20 Jun 2014 07:19:28 GMT

I will test the VDD_PA pin and then provide some feedback.

RE: Frequency drifting on nRF24L01+

Håkon Alseth — Thu, 19 Jun 2014 15:05:28 GMT

I cannot say that this is an issue we've seen before.

Can you verify that the L01+ is transmitting within the "dead voltage range"? This can be done by scoping VDD_PA pin (goes high for each on-air TX)
Can you please post the nRF chip markings? Should be something like:

NRF M 24L01+ 1313AA
Does this happen with other boards as well? Or is it only one of them?