why mysensors is based on nrf24?

[Reza]

@VaZso @AWI thank you friends. if simple NRF with pcb antenna that you use (original) have a good connection with 15-20 m distance and 30-40 cm width wall ( a connection without any lost or failed packet) so NRF is good radio really. I have not experienced it until now.

[VaZso]

@Reza Don't forget it is only true if there are no other noises in that frequency like any WLAN radios at a nearby channel or microwave oven, etc.

Even a bluetooth connection can cause some loss as it is hopping from frequency to frequency.
Bluetooth works somewhat like in the tale - it does not interfere with other equipments but it interferes with all of them a bit...

So, if data integrity is really important, one should handle re-sending missing informations by software especially in wider ranges of distance. However, internal retry also helps.
(I don't know what mysensor's library do about this question.)

[Reza]

@VaZso i see different channels in my home and all channel was never busy.i am sure this is just related to radio structure

thank you

[VaZso]

@Reza What are you mean about "all channel was never busy"?
(I assume you tried free channels.)

Anyway, a simple wlan-scan only shows occupied wlan channels but not other communications (or noises) in the same frequency range.
Anyway, some modifications of the antenna may highly affects signal strength.

[Reza]

@VaZso i see 0-85 channel and i see most is silent , but my controller and gateway is 1m distance with router (because controller connect with lan cable to router)
anyway thank you. i think this is related to just chinese radio...