I'm putting together a system that monitors the contents of 3 silo's and reports the contents on a webpage.
Each silo has an electromechanical plumb bob type level sensor, and outputs an analogue voltage.
I want 2 of the silo's to have a simple radio tx and a microcontroller, and the 3rd to have an rx and the wifi server.
The thing is comming up with a protocol that works, the 2 transmitters cannot detect if the other is transmitting, I was thinking of just transmitting at a random time for each 'packet', and cope with some transmissions going missing when both transmit at the same time.
Data rate is very slow, even if half of the 'packets'get corrupted it'll still work fine, it takes several minutes for the level to change in these things, they hold a lot.
Any ideas?
Each silo has an electromechanical plumb bob type level sensor, and outputs an analogue voltage.
I want 2 of the silo's to have a simple radio tx and a microcontroller, and the 3rd to have an rx and the wifi server.
The thing is comming up with a protocol that works, the 2 transmitters cannot detect if the other is transmitting, I was thinking of just transmitting at a random time for each 'packet', and cope with some transmissions going missing when both transmit at the same time.
Data rate is very slow, even if half of the 'packets'get corrupted it'll still work fine, it takes several minutes for the level to change in these things, they hold a lot.
Any ideas?