I am trying to implement the following :
I got 2 (more than 1 anyway) distinct sensors and an arduino and I need to get the sensors' state wirelessly.
Here is what I have thought of so far:
As for the wireless part, I am going with 2 RF transmitters and an RF receiver (433Mhz - found this on ebay)
My problem is, I need to distinguish between the 2 RF transmissions. I do not expect them to go off at the same time, but I can't simply send a simple HIGH transmission. And I don't want another arduino controller simply to handle the sensor.
My thoughts were to implement a custom bit sequence per sensor using the following :
- a 4-bit counter plus some logical gates to create the sequence
- a 555 IC in astable mode serving as a clock
- a 555 IC in monostable mode triggered by the sensor, triggering the RF transmission
Would this work? Will I have a problem receiving the sequence with my arduino?
This is actually my first try in electronics, so any help will be appreciated. I am open to suggestions if my thinking above wouldn't work.
Thanks in advance!