I need a way to transfer small amount of data (4 8bit integers + checksum) over wireless.
I'm struggling to find any information dealing with sending serial transmissions over some sort of radio link. Sending is quite simple, but I have no idea how would the receiving end work, as it needs a clock, which can't be provided over radio.
The second thing is I don't really know which technology to choose for the radio. I'm hoping to build something really really simple and cheap. Range wise i'd be happy with a few meters, say 10, in unobstructed space. Transmission speeds of about 10kbit per second would be sufficient, I think at that speed the bandwidth falls within voice range.
I've built a small FM transmitter before but I have no idea how to make both transmitter and the receiver with a fixed tuning that won't drift when the circuit heats up or the antenna changes shape.
Also I realise that this question is a bit vague, and i'm not looking for finished solution, just some pointers on how to address these problems
EDIT: I haven't made up my mind yet. The proposed modules are either more expensive or require more work to set up in the configuration that I want. What I think i'm going to do in meantime is build a small FM transmitter with two signal generators, each frequency associated with 0 or 1. I can generate the frequency directly from the MCU on the transmitter end. On the receiver I will do a simple freq filter, that should give me 0 or 1 output, I still have to figure out how to clock it though. In the end total parts will definitely be under £1. i'll try to find some material on data transmissions, maybe there is a better way of doing it.
Thanks for the answer Anindo, I will accept if my attempt ends up futile.