Hacking_and_Penetration_Testing_with_Low_Power_Devices

Remote control via python
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serial_port ¼ serial.Serial(’/dev/ttyO2’, 57600)
xbee ¼ Xbee(serial_port)
xbee.tx(dest_addr¼’\x00\x00’, data¼”This is my data”)
The XBee module supports receiving data synchronously or asynchronously. The
following code snippet demonstrates synchronous mode:
import serial
from xbee import XBee
serial_port ¼ serial.Serial(’/dev/ttyUSB0’, 57600)
xbee ¼ XBee(serial_port)
while True:
try:
print xbee.wait_read_frame()
except KeyboardInterrupt:
break
serial_port.close()
In order to use asynchronous mode, a callback function must be defined and registered.
The upside of using asynchronous mode is that your script can be off doing
other things when no data are being received by the XBee modem. The following
snippet demonstrates the use of asynchronous mode:
import serial
import time
from xbee import Xbee
def dispatch_packets(data):
saddr ¼ data[’source_addr’]
saddr_long ¼ data[’source_addr_long’]
rec_data ¼ data[’rf_data’]
print “Received %i bytes from MAC %s with address %s” %
(len(rec_data), repr(saddr_long), repr(saddr))
serial_port ¼ serial.Serial(’/dev/ttyUSB0’, 57600)
xbee ¼ Xbee(serial_port, callback¼dispatch_packets)
while True:
try:
print “Doing something else”
sleep(1)
except KeyboardInterupt:
break
xbee.halt()
serial_port.close()
In order to control our drones using XBee, we must establish a protocol for this
communication. The simple protocol we will use is to start packets with a command
or packet identifier followed by a colon. Commands sent to drones will start with
“c:”. Responses back to the command console will be of the form “lr:” followed by a number of packets beginning with “r:”. Announcements
can be sent from the drones by send a packet that starts with “a:”.