Technical question: if I would have 3 HC-12 Transmitters in an area of less than a square meter, and one transmitter in more distant location (10 meters for example) would there be high radio interference if I would like the 3 to be connected all between themselves and with the 4th one additionally?
That would depend on how you define "interference".
If the transmitters are not on the same channel, or not transmitting at the same time, problems are dramatically reduced.
Channel separation may be degraded with transmitters located so close together, if they transmit simultaneously.
Suppose the transmitters are located close together, not on the same channel but they do transmit at the same time, would that cause interference, i.e loss of information on different channels?
Likely, for adjacent channels.
Try it yourself and post the results.
I wish I had the equipment... I am currently deciding what to chose
IF there is a receiver that is listening to your transmitters, then there will be what is called "desensing" in the receiver. That means the automatic gain control in the receiver will have the gain reduced by the strongest signal and will take time to recover it's sensitivity and during that time may not be able to receive a weak signal.
There are other possible problems like two signals mixing in the receiver to produce spurious signals that will make the receiver circuitry not able to decode the data in the transmission.
Your testing will possibly uncover other problems.
It is very difficult to predict how well radios will work in your environment, based on the information in the data sheet. Performance depends on antenna design, antenna orientation, power output, the presence of nearby reflecting and absorbing materials, other interference from motors, etc., etc.
Really, your only option is to buy a couple and experiment.
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.