I have 3 main questions that I want to know. I mostly worked with computer science but recently I got an arduino to play around with. I also extracted some motors from an old rc quadcopter that i had. I figured that with these parts, I could build my own arduino quadcopter as a learning project. Anyway, I did some research on RF transmitters and receivers, but there were many types, and I wasnt sure which one to get. Which leads to my questions
- Does power determine range? There are many transmitters with varying degrees of power, and it seems pretty consistent that more wattage = longer range. I was wondering if this is in fact the case, and I should be looking for a transmitter with higher power intake.
- Does 2.4 ghz go through objects? I was reading about most RC transmitters switching to 2.4 ghz because there is less interference, but i also read that you need line of sight. But then looking up line of sight, it turns out that you only need radio line of sight, which looks more like an elipse than a straight line. So I was wondering if 2.4 ghz will work for me, since I eventually want to fly it where I cannot see it, and control it with an FP camera.
- What gives me channels? https://m.ebay.com/itm/1-pair-of-RF-433Mhz-Transmitter-and-Receiver-Module-Kit-for-Arduino-Raspberry-Pi-/311858165335 This module for example has on the receiver 3 terminals, VCC, GND, and data. Does this mean it only has 1 channel? Does this mean that I can only control 1 function (ie. Rotation, forward/backward) with this module?
So in summary, i was hoping someone could point me to a decent transmitter and receiver combo with 1000m range and multiple channels. Not looking for prebuilt, just the circuits. Hope everything made sense and thanks