■ PHOTO 3. This is the first cousin
of the q51 PANalyzer. The ZENA
can be used in 802.15.4, ZigBee,
and MiWi networks.
followed by SHOP1. You can use Screenshot 2 to pick out the proprietary
Mi Wi ways versus the official 802.15.4 protocol. Screenshot 2 was generated
by Microchip’s Wireless Development Studio and the ZENA (Photo 3) which
are tuned to sniff Mi Wi P2P packets.
Believe it or not, we can reduce sleep current consumption by replacing
the TC1262 with a MCP1703A. The MCP1703A draws only 2 µA of
operational current. Again, nothing is free. The MCP1703A can only supply a
maximum of 250 mA to the load versus 500 mA provided by the TC1262.
The Mi Wi P2P node you see in Photo 1 has been sleeping on my bench now
for about a week. Every 20 minutes, it wakes up and sends a couple of bytes.
I figure I won’t have to worry about charging its battery for quite some time.
the captured MiWi
P2P data shown in
Using this as a
template, it's easy
to see where Mi Wi
strays from the
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