AVR Wireless communications

[3wais]

Hi guys,
this is my first time doing anything with wireless communications so forgive me if my questions are stupid !!

I have made a simple project in which 2 atmega16 chips can communicate with each other through UART and an RS485 cable(I intend to add more chips on the same cable)
now i want to use wireless communication instead of cables , so is there an IC that can do this for me ?

I am using 1M baud rate
Full Duplex system if it can be called so
I want a good coverage range 200 meter if possible
it would be good if it can support long ranges of 1Km and more !!
low price
low power consumption


Can it be built if no such ICs are available ?

Thanks

 

[sky_123]

For your high bitrate, only cost effective solution is wifi. Otherwise, you need to find spectrum. You can buy wifi modules and use them, building them would be quite hard so use modules.

 

[mtwieg]

Your distance, baud rate, and low power requirements make single IC solutions infeasible I think. For such high baud rates you're confined to ~2.4GHz band, and you'll need a decent bit of power to get the distances you want. Might not be possible, given FCC limitations.

To get you started, I would look at single IC transceivers like the following:
https://www.sparkfun.com/products/705 : I've used this before with an AVR. Meets your baud rate spec and is pretty low power, but it's only good for 100m LOS (unless you can find some kind of add on to boost its range).
https://www.ti.com/lit/ds/symlink/cc1101.pdf : These have much lower baud rate, but are good for longer distance, and you can get a range booster as well. 1Km may be possible with these.

 

[3wais]

https://www.sparkfun.com/products/705 : I've used this before with an AVR. Meets your baud rate spec and is pretty low power, but it's only good for 100m LOS (unless you can find some kind of add on to boost its range).

that one is good
except
how to boost the range ??
or if there are any similar ones with higher ranges ,with more power of course ?

 

[Riya78992]

Hi,

You can even check WhizNets WiFi modules. They seems to have many WiFi modules based on different interfaces.