- Thu Jun 19, 2008 7:01 pm
#50559
Hi all,
A question for any ZigBee experts out there: I'm trying to transmit small (8 byte) packets at a high (100Hz) rate on a pt-pt connection. I found, the hard way, that ZigBee seems to have a superframe period of 15ms (or at least the XBee Pro modules with the latest non-beacon firmware do -- BTW I haven't for the life of me been able to find "beacon" firmware for these guys), which means that 100Hz communication doesn't work out too well -- and I get a lot of latency jitter, which is a killer for my app.
I tried disabling ACK's in the MAC layer and tried fiddling with some other params, so far to no avail...
Any ideas on configuring these modules to enable 100Hz, fixed-latency (but not necessarily reliable) communication? If Bluetooth/standard ZigBee is TCP, i'm looking for a UDP-type wireless transport.
Am I barking up the wrong wireless tree? Do I need to be looking at other modules? Any advice would be incredible... I've spent a while looking at various modules/modems but exact latency/timing specs aren't always available/clear.
Thanks!
-The Bulldozer.
A question for any ZigBee experts out there: I'm trying to transmit small (8 byte) packets at a high (100Hz) rate on a pt-pt connection. I found, the hard way, that ZigBee seems to have a superframe period of 15ms (or at least the XBee Pro modules with the latest non-beacon firmware do -- BTW I haven't for the life of me been able to find "beacon" firmware for these guys), which means that 100Hz communication doesn't work out too well -- and I get a lot of latency jitter, which is a killer for my app.
I tried disabling ACK's in the MAC layer and tried fiddling with some other params, so far to no avail...
Any ideas on configuring these modules to enable 100Hz, fixed-latency (but not necessarily reliable) communication? If Bluetooth/standard ZigBee is TCP, i'm looking for a UDP-type wireless transport.
Am I barking up the wrong wireless tree? Do I need to be looking at other modules? Any advice would be incredible... I've spent a while looking at various modules/modems but exact latency/timing specs aren't always available/clear.
Thanks!
-The Bulldozer.