First commit with working implementation

sms_functions.py

@@ -0,0 +1,104 @@
+
+import logging
+import os
+from pydbus import SystemBus
+from gi.repository import GLib
+
+
+# Setup logging
+logfile = "/opt/sms/sms.log"
+FORMAT = '%(asctime)-15s %(message)s'
+logging.basicConfig(format=FORMAT,filename=logfile,level=10)
+logger = logging.getLogger('observiumsms')
+
+class ModemManagerError(Exception):
+    def __init__(self, value):
+        self.value = value
+    def __str__(self):
+        return repr(self.value)
+		
+class SIMError(ModemManagerError):
+    def __init__(self, value):
+        self.value = value
+    def __str__(self):
+        return repr(self.value)
+
+def assemble_sms():
+    str_list = []
+    str_list.append("Observium {}\n".format(os.environ.get('OBSERVIUM_TITLE')))
+    str_list.append("{} [{}]\n".format(os.environ.get('OBSERVIUM_ENTITY_NAME'), os.environ.get('OBSERVIUM_ENTITY_DESCRIPTION')))
+    str_list.append("{}".format(os.environ.get('OBSERVIUM_DURATION')))
+    return ''.join(str_list)
+
+def get_modem():
+    # Contact ModemManager, unlock SIM and send SMS to emergency numbers
+    with SystemBus() as bus:
+        mm = bus.get('.ModemManager1')
+        modems = mm.GetManagedObjects()
+        if not modems or len(modems) == 0:
+           raise ModemManagerError('No modems found') 
+        modem_path = list(modems.keys())[0]
+    
+        logger.info("Going with %s", modem_path)
+        modem = bus.get(".ModemManager1", modem_path)
+        return modem
+
+def unlock_sim(modem):
+    sim_path = modem.Sim
+    if not sim_path:
+        raise SIMError('No SIM card found') 
+            
+    # unlock SIM, if not alreadY
+    props = modem.GetStatus()
+    print(props)
+    if props and props['state'] == 2:
+        logger.info("Trying to unlock %s", sim_path)
+        with SystemBus() as bus:
+            sim = bus.get('.ModemManager1', sim_path)
+            sim.SendPin("1234", timeout=10000)
+            props = modem.GetStatus()
+            if props and props['state'] == 2:
+                remaining_attempts = modem.UnlockRetries
+                print(remaining_attempts)
+                raise SIMError('Wrong PIN!')
+
+def send_sms(recipients, smsstring):
+    
+    # Assemble SMS
+    logger.info("Sending SMS: %s", smsstring)
+    
+    # Get modem, unlock SIM
+    modem = get_modem()
+    unlock_sim(modem)
+    
+    # enable the modem
+    modem.Enable(True)
+    
+    # test sending SMS
+    modem_msg = modem['org.freedesktop.ModemManager1.Modem.Messaging']
+    smses = modem_msg.List()
+
+    print(modem.GetStatus()['signal-quality'])
+
+    for line in recipients:
+        line = line.strip()
+        if not line:
+                continue
+
+        logger.info("Creating new SMS for %s", line)
+        smstext = GLib.Variant('s', smsstring)
+        smsnumber = GLib.Variant('s', line)
+        
+        dictsms = { 'text': smstext, 'number': smsnumber }
+
+        msgpath = modem_msg.Create(dictsms)
+        logger.info("Created new SMS %s", msgpath)
+
+        logger.info("Sending SMS %s", msgpath)
+        with SystemBus() as bus:
+            sms = bus.get(".ModemManager1", msgpath)
+            sms.Send(timeout=30000)
+            
+            logger.info("SMS %s state %s", msgpath, sms.State)
+    
+