Detect presence of RaZberry

[skiv71]

Hi,

I'm looking to detect the presence of the RaZberry GPIO board.

I've found out that the port, ttyAMA0 is always present in Raspbian, regardless of any device that might be connected.

With that in mind, is there any way I can probe the serial to discover if RaZ is actually present?

Thanks

Neil

[pofs]

Sure it is Try to initialize the library (or its JS binding) on that port, if discover fails then it is not a valid Z-Wave device.

[skiv71]

I've been in touch with ps @ zwave and he's mentioned the get-tty but I really need to do this by sending a hex string and looking for a response. Not sure what to send though and what to expect

[skiv71]

I sussed it myself...

#!/bin/bash

# initialise
port=/dev/ttyAMA0

# set port
stty -F $port cs8 raw 115200

# test port
echo -ne "\x01\x03\x00\x07\xFB" >$port
a=($(xxd -p -l 12 -c 2 <$port))
b=$(printf %.d 0x${a[3]})

# evaluate
if [ "$b" = "327" ]; then
echo z-wave.me
fi

[pofs]

This may actually fail in case there's a number of devices in your network reporting to controller. So report from device will be read instead of actual response (which will come later).
So it basically works, but is not 100% reliable.