hi, i have been working on a project where i have a sensor which sends data to a receiver connected to a laptop, both the transceiver and receiver where being placed on an arduino with nrf24l01+ antennas, it works perfectly, but know because of "security" issues, i can't use the 2.4ghz antennas, they say they might have interference with other stuff running on that freq, any ideas what other low cost antenna i can use?
Thanks.
You might try the very cheap 433 MHz modules, similar to these:
together with the VirtualWire library.
can they have more that 1 pair working in the same area without problem?
also, these aren't 2 way, i do need 2 way communication
Among similar more expensive possibilities there is this two-way modem operating at 433 MHz, which supposedly has 8 channels. I haven't used it. Modem Long Range 433MHz: UM96 - Includes Antenna and Cable - WRL-00155 - SparkFun Electronics
just that there isn't any arduino library for them is it?
What would you need the library for? This is supposed to be a serial com port.
i just read that, thx, its definitely an option, pretty easy too, ill just wander around to see if there is a cheaper one out there.
something to consider with this module is that the logic is 3.3v i need to have a voltage divider for this am i right?
What sort of security are you concerned with?
If you are only concerned that data transmission between your wireless devices will be reliable I would have though the NRF devices would have plenty of protection. I haven't used them but I suspect they are similar to the Cypress CYRF6936 which I have been using and which has several options for ensuring transmission reliability in "busy" environments. Perhaps all of the features are not exposed by whatever library you are using?
...R
the concern is not actually on the nrf modules, but that people im doing this for is concerned that thier other communications might get garbage from the nrf, I believe this is wrong too, but i can't make them change their minds 