Hi There. I'm ready to develop a system involving some sensors distributed which would be sending their reading to a "central" node and after investiganting the different options I am a little confused.
Options I see: RF24L01 (w and w/o PA+LNA), RFM22, ZigBee, and LoRa, mainly.
I see they are all basically Low Power modules that would let me send and receive some payload
But my confusion comes here in the differences between them all.
Are they a point to point (like a transparent serial line) RF line? Or can they receive from different modules at the same time?
I see Lora is mainly used in LoRaWan protocols, which seems to work to connect singular devices (mostly IoT) to a main gateway (like in the city, unfortunately in mine there's no endpoints). Can I still use LoRa as a normal device "interconnection" system so all the devices talk to a central point (and then the centrl point has the WAN interface -Wifi or Sigfox- to the world)?
In my scenario, where I would have like 5-10 devices reading a parameter every 10 minutes and a central gateway which would listen to the remote devices and forward the reading to "the cloud", which system would you use to communicate them all? I'm now biased towards nRF+PA+LNA but I don't understand the channels/pipes relationship and whether it would be able to LISTEN at the same time to several clients or it's only for a PTP link. It seems like I could listen to 5 pipes at the same time? Do I need to set up same channel and pipe# on both ends?
Any clarification on these would be really appreciated