RF modules (27997/transceiver) multi-point communication
dx9s
Posts: 7
This is a new (spawned from another thread) thread to request information from those that have used the 433Mhz RF modules in a multi-point configuration.
http://www.parallax.com/detail.asp?product_id=27997
According to the two page PDF (not much information), it is possible.
Curious as to others' experience with distance, interferance, speeds, etc. The webpage (above) claims the distance is 150 feet, if so, then multiple "master" units will need to be used.
The handshaking and polling method would incorportate the last known master-node that was in range of the slave node. If fails to poll over a few attempts, the next master node will be used to "contact" the slave a few times (round robbin), Conditions can be programmed (for both master and slave device) if enough time passes without a completed poll.
I need to visualize 150feet and assuming that walls and other metal objects will probably reduce the range down to 75 feet -- and take this into concideration. The datarates for the above device are 600bps, 1200bps (recommended) and 2400bps. I would have hopped to have a higher datarate, but I will need to work out a priority system as apart of the polling/scanning and message/packet priority.
--Doug
http://www.parallax.com/detail.asp?product_id=27997
According to the two page PDF (not much information), it is possible.
Curious as to others' experience with distance, interferance, speeds, etc. The webpage (above) claims the distance is 150 feet, if so, then multiple "master" units will need to be used.
The handshaking and polling method would incorportate the last known master-node that was in range of the slave node. If fails to poll over a few attempts, the next master node will be used to "contact" the slave a few times (round robbin), Conditions can be programmed (for both master and slave device) if enough time passes without a completed poll.
I need to visualize 150feet and assuming that walls and other metal objects will probably reduce the range down to 75 feet -- and take this into concideration. The datarates for the above device are 600bps, 1200bps (recommended) and 2400bps. I would have hopped to have a higher datarate, but I will need to work out a priority system as apart of the polling/scanning and message/packet priority.
--Doug