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BS21.py

@@ -0,0 +1,113 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+__author__ = 'thomas'
+
+import serial
+import os
+import argparse
+##from datetime import datetime
+
+verbosity=False
+
+def log(param):
+    if verbosity:
+        print param
+
+class BS21:
+    def __init__(self, dev='/dev/tty.BS21-21-000000-0-A-SPPDev', pin='1234'):
+        self.dev = dev
+        self.pin = pin
+        self.resp=None
+
+    def openSerialPort(self):
+        """
+        open the serial port for the bluetooth SDP/RFCOMM connection
+        """
+        try:
+            s = serial.Serial(
+                port=self.dev,
+                baudrate=115200,
+                parity=serial.PARITY_NONE,
+                stopbits=serial.STOPBITS_ONE,
+                bytesize=serial.EIGHTBITS,
+                timeout=10)
+            #s.open()  ## is alerady open? Ouch!
+        except serial.SerialException as e:
+            print "ERROR: "+e.message
+            s = None
+            log("... failed to open the serial port!")
+        return s
+
+    def command(self, cmd):
+        bs21 = self.openSerialPort()
+        if bs21==None:
+            log("something wrong, quitting")
+            print "ERROR"
+            exit()
+        log("connection established, write command "+cmd+"...")
+        bs21.write(cmd+"#"+ self.pin + "\r\n")
+        log("command transmitted, now waiting for response...")
+        resp = self.getResponse(bs21)
+        dollar=(resp[0][0]=='$')
+        if not dollar:
+            log("unexpected response: "+self.resp)
+            print "ERROR"
+        elif resp[0]=='$OK':
+            pass
+        elif resp[0][1:3]=='BS':
+            (hw, ver, unknown, hh, mm, ss) = resp[0].split(' ')
+            (str_bs, str_21, serialId, state, str_A) = hw.split('-')
+            print "Model "+str_bs[1:3]+"-"+str_21+" Serial ID="+serialId
+            print "  Revision "+ver
+            if state == '1':
+                print "  Power switch = ON"
+            elif state == '0':
+                print "  Power switch = OFF"
+            else:
+                print "  Power switch = UNKNOWN ("+state+")"
+            print "  Time: "+hh+":"+mm+":"+ss
+        bs21.close()
+
+    def getResponse(self, bs21):
+        self.resp=bs21.readline().strip()
+        log("... got response: '"+self.resp+"'")
+        return self.resp.split('|')
+
+
+if __name__=="__main__":
+    parser = argparse.ArgumentParser(
+        description='control Renkforce BS21 via Bluetooth',
+        epilog='''
+        Valid commands are either raw BS21 protocol like RELX, REL0, REL1, INFO, CLEAR00 (all uppercase)
+        or complex commands (all lowercase):
+            timer
+            ...
+        optional: store bluetooth device in environment variable $BS21_DEV and the PIN in $BS21_PIN
+        ''')
+    parser.add_argument('-v', '--verbose', help='increase verbosity', action="store_true")
+    parser.add_argument('-d', '--device', type=str, help='path to the device file for bluetooth connection')
+    parser.add_argument('-p', '--pin', type=str, help='the PIN to access BS21')
+    parser.add_argument('command', type=str, nargs='+', help='command (+args) to execute')
+    args = parser.parse_args()
+    if args.pin:
+        PIN=args.pin
+    else:
+        PIN=os.environ.get('BS21_PIN')
+        if not PIN:
+            PIN=raw_input("Enter the PIN: ").strip()
+    if args.device:
+        #TODO: check for existence
+        DEV=args.device
+    else:
+        DEV=os.environ.get('BS21_DEV')
+        if not DEV:
+            #TODO: search for resonable device /dev/tty.BS....
+            DEV="/dev/tty.BS-21-00NNNN-0-A-SPPDev"
+    if args.verbose:
+        verbosity=True
+        print "calling BS21 with device=%s and PIN=%s" % (DEV, PIN)
+    sw=BS21(DEV, PIN)
+    sw.command(' '.join(args.command))
+
+