Technology design recommendation

[eosella]

I'm designing a  solution based on a series of nodes that senses data and has to send it wirelessly to a hub. Each hub must be able to receive data from about 4 to 8 nodes. The raw data is generated at a rate of about 62000 bits per second by each node. This nodes are supposed to be working with batteries, so power consumption considerations is a must.

I've never develped any wireless device, neither specific comunication protocols, more than simple UART, I2C or SPI comunications,  so I'm pretty newbie about this kind of stufs.

From the things that I've been looking, I was wondering if Bluetooth (or even B Low energy) in a star topology could be a solution, using a pc or a cellphone as hub, but there is a plethora of information on internet and is getting hard to find the ball point.

What could the community suggest me? (including bibliography)

Thanks!

Esteban

[haakonsh]

PCB antennas should be fine, they are quite good if done right. 

There is one big problem with wearable devices and the 2.4GHz spectrum and that is the fact that at those frequencies the EM waves are completely attenuated by water, of which the human body has plenty. It's why we use 2.4GHz for our microwave ovens.
Luckily you intend to be indoors, reflections from walls will be able to reach the receiver, but you will end up in scenarios where the device is in a position where you won't get the expected throughput. This is fairly unavoidable with 2.4GHz RF. The only way to know the impact for sure is to try it out. 

I suggest you get your hands on a couple of nRF52832 or 52840 DKs, load them up with the Experimental: ATT_MTU Throughput Example, and try it out by walking around in a room similar to what you intend to use the device in and monitor the throughput.