From e56d4c6ab01979fcf19a570f2db47ee714a5c913 Mon Sep 17 00:00:00 2001
From: Joerg Lehmann <joerg.lehmann@nbit.ch>
Date: Sat, 19 Aug 2017 17:47:41 +0200
Subject: [PATCH] Initial Commit

---
 bin/beielimon-config.yaml |   7 ++
 bin/beielimon.py          | 133 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 140 insertions(+)
 create mode 100644 bin/beielimon-config.yaml
 create mode 100755 bin/beielimon.py

diff --git a/bin/beielimon-config.yaml b/bin/beielimon-config.yaml
new file mode 100644
index 0000000..d7cdaac
--- /dev/null
+++ b/bin/beielimon-config.yaml
@@ -0,0 +1,7 @@
+scale_interfaces:
+- usb_pce
+read_scale_interval_sec: 5
+number_of_samples: 5
+sms_alert_phonenumbers:
+- "0765006123"
+swarm_alarm_threshold_gram: 50
diff --git a/bin/beielimon.py b/bin/beielimon.py
new file mode 100755
index 0000000..43d7211
--- /dev/null
+++ b/bin/beielimon.py
@@ -0,0 +1,133 @@
+#!/usr/bin/env python
+# -*- coding: UTF-8 -*-
+# vim: expandtab sw=4 ts=4 sts=4:
+#
+# Beehive-Monitoring with SMS Alerts and Data-Upload to
+# Webservice.
+#
+# Author: Joerg Lehmann, nbit Informatik GmbH
+#
+"""Beehive Monitoring"""
+
+from __future__ import print_function
+import gammu.smsd
+import sys
+import serial
+import time
+import yaml
+
+# Read Configuration from YAML-File
+with open("beielimon-config.yaml", 'r') as stream:
+    try:
+        config_data = yaml.load(stream)
+    except yaml.YAMLError as exc:
+        print(exc)
+
+# Constants
+INVALID_VALUE = -999
+
+# Interface to gammu-smsd
+smsd = gammu.smsd.SMSD('/etc/gammu-smsdrc')
+
+class Scale(object):
+    def __init__(self):
+        self.last_values = []
+
+    def __del__(self):
+        pass
+
+    def AppendReading(self,weigh_in_gram):
+        self.last_values.append(weigh_in_gram)
+        if len(self.last_values) > config_data['number_of_samples']:
+            self.last_values = self.last_values[1:]
+        print('DEBUG WEIGHT: %d' % (weigh_in_gram))
+        print(self.last_values)
+
+    def Read(self):
+        pass
+
+    def SwarmAlarm(self):
+        return (self.GetWeighLoss() > config_data['swarm_alarm_threshold_gram'])
+
+    def ResetValues(self):
+        self.last_values = []
+
+    def GetLastValue(self):
+        return (self.last_values or [0])[-1]
+
+    def GetWeighLoss(self):
+        last_value = self.GetLastValue()
+        max_value = max(self.last_values or [0])
+        print('BBB: ',max_value,last_value)
+        return (max_value - last_value) 
+
+
+class ScaleUSB_PCE(Scale):
+    def __init__(self,serial_int):
+        Scale.__init__(self)
+        self.ser = serial_int
+
+    def Read(self):
+        res = INVALID_VALUE
+        self.ser.write('Sx\r\n') 
+        weight_string = self.ser.readline()
+        if len(weight_string) == 16:
+            if (weight_string[12:13] == 'g'):
+                try:
+                    res = int(weight_string[2:11])
+                except: 
+                    print('DEBUG WEIGHT STRING IS NOT AN INTEGER: %s' % (weight_string[2:11]))
+            else:
+                print('DEBUG WEIGHT STRING SHOULD BE IN GRAMS: but is [%s]' % (weight_string[12:13]))
+        else:
+            print('DEBUG WEIGHT STRING SHOULD BE 16 DIGITS: but is %d' % (len(weight_string)))
+        if res != INVALID_VALUE:
+            self.AppendReading(res)
+
+
+class ScaleDummy(Scale):
+    def __init__(self,serial_int):
+        pass
+    def Read(self):
+        pass
+
+
+def send_sms(phonenumbers , text):
+    for phonenumber in phonenumbers:
+        message = {
+        'Text': text,
+        'SMSC': {'Location': 1},
+        'Number': phonenumber
+        }
+   
+        smsd.InjectSMS([message])
+
+def main():
+    scales = []
+    for scale_interface  in config_data['scale_interfaces']:
+        if scale_interface == 'usb_pce':
+             ser = serial.Serial(port='/dev/ttyUSB0', 
+                                 baudrate=9600,
+                                 bytesize=serial.EIGHTBITS,
+                                 parity=serial.PARITY_EVEN,
+                                 timeout=20000)
+             scale=ScaleUSB_PCE(ser)
+             scales.append(scale)
+                        
+    # Main Loop
+    while True:
+        for scale in scales:
+            scale.Read()
+            if scale.SwarmAlarm():
+                date_time = time.strftime("%d.%m.%Y %H:%M:%S"))
+                last_value = scale.GetLastValue()
+                weigh_loss = scale.GetWeighLoss()
+                sms_message = '*** Schwarmalarm ***\nDatum/Zeit: \nLetztes Gewicht [g]: %d\nGewichtsverlust [g]: %d' % (date_time,last_value,weigh_loss)
+                print(config_data['sms_alert_phonenumbers'],sms_message)
+                send_sms(config_data['sms_alert_phonenumbers'],sms_message)
+                scale.ResetValues()
+
+        time.sleep(config_data['read_scale_interval_sec']) 
+
+if __name__ == "__main__":
+    main()