Why doesn't my MX-FS-03V / MX-05V 433MHz trick work?
The idea is to attach the transmitter (no arduino) to a walking cane, and have receiver + [small] arduino + buzzer in a pocket/bag.
Transmitter is pretty dumb: I connect gnd or vcc to data (whichever works best). The idea is to figure out how the receiver behaves when there's no transmition (high, low, or random) and choose to transmit whatever distinctively says "I'm alive" :)
The receiver setup (at the moment) simply connects one of the rx pins (there are 2) to an analog input on an arduino, samples it in a loop and blurts it to Serial.
Now when I simulate the input with "native" gnd or vcc, it says 0 or 1023 like it should, but when I connect the receiver, it's quite erratic. Not as random as sampling a brick, but not any more useful.
Any idea what I'm doing wrong?