The nRF24 series is marked as Not Recommended For New Designs. Yet looking specifically at nRF24L01 and nRF2401A, both not recommended, they recommend using nRF24L01+ and a couple of others instead. Are we safe to use nRF24L01+, or will it too be (is already) not recommended? Are there other alternatives?
Our timing-sensitive industrial application requires low latency and even lower jitter. We want communications latency to be <1ms, worst case.
I set up an experiment with two nRF24L01 modules, each with an 8-bit AVR, separated by ~3 feet. With the oscilloscope set to infinite persistence, over two hours it recorded a min/max latency of 0.725/0.775ms. That is a jitter of +/-25µs. This is great, we can work with that.
It seems that nRF52 is Nordic's recommended alternative, but can it match that latency? From posts here it looks like nRF52 will have a minimum jitter of 7.5ms, correct? That is related to the time between communication events. This will not work. Can it have a mode where it emulates nRF24, including latency?
