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# -*- coding: utf-8 -*-
import paho.mqtt.client as mqtt
import time
import json
import base64

def on_connect(client, userdata, flags, rc):
    print("Connected with result code " + str(rc))

dev_eui = 'ZZZZZ'

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#-*- coding: utf-8 -*-
u"""
MOD: pymongo
"""


import pymongo


#===============================================================================

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# mongo_test_restaurants.py
# Python 2.7.6

"""
Test script to connect to MongoDB collections using pymongo library
Connects to an already imported connection named "restaurants"
source - https://docs.mongodb.org/getting-started/python/
"""

from pymongo import MongoClient, ASCENDING, DESCENDING

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First install pip for Python2. Download the get-pip.py file from https://bootstrap.pypa.io/get-pip.py
$ cd <download location>
$ sudo -H python ./get-pip.py

Installing pip also installs Python3
To run Python3
$ python3

Install pip3 by just executing the same file as in the step above, but this time using Python3
$ sudo -H python3 ./get-pip.py

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# capture mjpegstream -r Framerate 
ffmpeg -f mjpeg -r 2 -i "http://127.0.0.1/rpicam/cam_pic_new.php?" -r 2 ./video.avi

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#include <string>
#include <ctime>
#include <msgpack.hpp>

struct message
{
  std::string tag;
  std::time_t time;
  std::string text;
  MSGPACK_DEFINE(tag, time, text);

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MySQL

Getting started

• http://www.sqlteaching.com/
• https://www.codecademy.com/learn/learn-sql

Related tutorials

• MySQL-CLI
• Analyzing Business Metrics
• SQL joins infografic

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# --------- SCRIPT BEGIN ----------
# By Bret Stateham
# This script assumes
# - You are running on a linux machine
# - You have the can-utils installed and working.  See:
#   - https://github.com/linux-can/can-utils
#   - https://www.kernel.org/doc/Documentation/networking/can.txt
# - You have a can device attached and configured as can0 (you can change the targetbus variable to match if otherwise)
# - The can device is attached to your running target vehicle

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//
//  "Pacifica"
//  Gentle, blue-green ocean waves.
//  December 2019, Mark Kriegsman and Mary Corey March.
//  For Dan.
//

#define FASTLED_ALLOW_INTERRUPTS 0
#include <FastLED.h>
FASTLED_USING_NAMESPACE

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Python environment cheatsheet

virtualenv

Tool for creating isolated Python environments

The common use-cases:

• Handling different versions of same libraries per each service
• Same plus no access to site-packages