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db = db.getSiblingDB("whyd_music") // explicitely select collection
var jan2014 = ObjectId("52c35a800000000000000000"); // created using http://steveridout.github.io/mongo-object-time/
db.post.aggregate([
	{"$sort": {"_id": -1}}, // order: antichronological
	{"$match": {"_id": {"$gt": jan2014}}}, // only documents that were created after the 1syt january 2014
	{"$group": {"_id": "$eId", // group by value of the eId attribute -> _id attribute in the resulting output collection
	            "name": {"$first": "$name"}, // -> include the name of each grouped category
	            "count": {"$sum": 1}}}, // -> count attribute will contain the number of documents for each value of _eid
	{"$match": {"count": {"$gt": 50}}}, // limit output to results with count > 50
	{"$sort": {"count": -1}} // output order: highest count first

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#!/usr/bin/python
from Tkinter import *
from phue import Bridge

'''
This example creates 3 sliders for the first 3 lights
and shows the name of the light under each slider.
There is also a checkbox to toggle the light.
https://github.com/studioimaginaire/phue/
'''

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:: create mongodb.conf and Install mongodb as autorun Service with DB and log File in this Directory
::https://docs.mongodb.com/v2.4/reference/configuration-options/
@echo off
mkdir mongodb
set MONGOCONF=mongodb.cfg
echo logpath=%CD%\mongodb.log> %MONGOCONF%
echo logappend=true >> %MONGOCONF%
echo dbpath=%CD%\mongodb >> %MONGOCONF%
echo bind_ip = 127.0.0.1   >> %MONGOCONF%
echo port = 27017 >> %MONGOCONF%

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Connecting Sensors to the Internet using LoRaWAN Hackday

15 July 2017 public link: https://hackmd.io/s/H1lA3HLrb #LoRaLIV

[TOC]

Schedule

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    #!/usr/bin/python
     
    import os
    import datetime
    import ftplib
    import traceback
    import math
    import random, string
    import base64
    import json

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#!/usr/bin/env python

"""
Plot data received over a ZeroMQ port in real time using matplotlib.

Notes
-----
This appears to segfault when run using the WxAgg backend.
"""

malefs

How to setup mount / auto-mount USB Hard Drive on Raspberry Pi

Follow the simple steps in the order mentioned below to have your USB drive mounted on your Raspberry Pi every time you boot it.

These steps are required especially if your are setting up a Samba share, or a 24x7 torrent downloader, or alike where your Raspberry Pi must have your external storage already mounted and ready for access by the services / daemons.

Step 0. Plug in your USB HDD / Drive to Raspberry Pi If you are using a NTFS formatted drive, install the following

malefs

[general]
allowguest=no
port = 5060
bindaddr = 0.0.0.0
qualify = no
disable = all
allow = alaw
allow = ulaw
videosupport = no
dtmfmode = rfc2833

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import time
import shutil
import RPi.GPIO as gpio
import os
import sys

#Einstellungen
klingel_gpio = 4 #GPIO, der mit der Schaltung verbunden ist
callfilepfad = "/home/pi/klingel.call" #Dateipfad in dem das Script die .call-Datei ablegt
sipkanal = "624" #Name des SIP-Kanals (in eckigen Klammern in der SIP.conf)

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Weltempfänger
Raspi als Internet-Radio mit Touch-Bedienung
c't 6/17, S. 84
-----------------------------------------------------------
Für die meisten nachfolgenden Schritte sind Root-Rechte nötig:
  sudo su -
Ausgabe auf Raspi-Touch-Display drehen:
  echo "lcd_rotate=2" >> /boot/config.txt
Basis-Konfiguration von Raspbian:
  raspi-config