Issue 45 - Fix for Python3 bglib.py (and added example from Python2)

Python3/Examples/bglib_test_scanner.py

@@ -0,0 +1,117 @@
+#!/usr/bin/env python3
+
+""" Bluegiga BGAPI/BGLib implementation
+
+Changelog:
+    2013-04-11 - Initial release
+
+============================================
+Bluegiga BGLib Python interface library test scanner app
+2013-04-10 by Jeff Rowberg <[email protected]>
+Updates should (hopefully) always be available at https://github.com/jrowberg/bglib
+
+============================================
+BGLib Python interface library code is placed under the MIT license
+Copyright (c) 2013 Jeff Rowberg
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+===============================================
+
+"""
+
+__author__ = "Jeff Rowberg"
+__license__ = "MIT"
+__version__ = "2013-04-11"
+__email__ = "[email protected]"
+
+
+import bglib, serial, time, datetime
+
+# handler to notify of an API parser timeout condition
+def my_timeout(sender, args):
+    # might want to try the following lines to reset, though it probably
+    # wouldn't work at this point if it's already timed out:
+    #ble.send_command(ser, ble.ble_cmd_system_reset(0))
+    #ble.check_activity(ser, 1)
+    print("BGAPI parser timed out. Make sure the BLE device is in a known/idle state.")
+
+# handler to print scan responses with a timestamp
+def my_ble_evt_gap_scan_response(sender, args):
+    print("gap_scan_response",)
+    t = datetime.datetime.now()
+    disp_list = []
+    disp_list.append("%ld.%03ld" % (time.mktime(t.timetuple()), t.microsecond/1000))
+    disp_list.append("%d" % args["rssi"])
+    disp_list.append("%d" % args["packet_type"])
+    disp_list.append("%s" % ''.join(['%02X' % b for b in args["sender"][::-1]]))
+    disp_list.append("%d" % args["address_type"])
+    disp_list.append("%d" % args["bond"])
+    disp_list.append("%s" % ''.join(['%02X' % b for b in args["data"]]))
+    print(' '.join(disp_list))
+
+def main():
+    # NOTE: CHANGE THESE TO FIT YOUR TEST SYSTEM
+    port_name = "/dev/ttyACM0"
+    baud_rate = 115200
+    packet_mode = True
+
+    # create BGLib object
+    ble = bglib.BGLib()
+    ble.packet_mode = packet_mode
+
+    # add handler for BGAPI timeout condition (hopefully won't happen)
+    ble.on_timeout += my_timeout
+
+    # add handler for the gap_scan_response event
+    ble.ble_evt_gap_scan_response += my_ble_evt_gap_scan_response
+
+    # create serial port object and flush buffers
+    ser = serial.Serial(port=port_name, baudrate=baud_rate, timeout=1)
+    ser.flushInput()
+    ser.flushOutput()
+
+    # disconnect if we are connected already
+    ble.send_command(ser, ble.ble_cmd_connection_disconnect(0))
+    ble.check_activity(ser, 1)
+
+    # stop advertising if we are advertising already
+    ble.send_command(ser, ble.ble_cmd_gap_set_mode(0, 0))
+    ble.check_activity(ser, 1)
+
+    # stop scanning if we are scanning already
+    ble.send_command(ser, ble.ble_cmd_gap_end_procedure())
+    ble.check_activity(ser, 1)
+
+    # set scan parameters
+    ble.send_command(ser, ble.ble_cmd_gap_set_scan_parameters(0xC8, 0xC8, 1))
+    ble.check_activity(ser, 1)
+
+    # start scanning now
+    ble.send_command(ser, ble.ble_cmd_gap_discover(1))
+    ble.check_activity(ser, 1)
+
+    while (1):
+        # check for all incoming data (no timeout, non-blocking)
+        ble.check_activity(ser)
+
+        # don't burden the CPU
+        time.sleep(0.01)
+
+if __name__ == '__main__':
+    main()

Python3/bglib.py

@@ -615,7 +615,7 @@ def wifi_cmd_i2c_stop(self, endpoint):
     debug = False
 
     def send_command(self, ser, packet):
-        if self.packet_mode: packet = chr(len(packet) & 0xFF) + packet
+        if self.packet_mode: packet = bytes([len(packet) & 0xFF]) + packet
         if self.debug: print('=>[ ' + ' '.join(['%02X' % b for b in packet]) + ' ]')
         self.on_before_tx_command()
         self.busy = True