jmsaavedra

AWS SERVER CONFIGURATION

Configuring an Ubuntu AWS Box with Node, Mongodb, and Forever with port forwarding

---

• Login to aws.amazon.com and create an EC2 instance with a standard Ubuntu (14.04) installation.
• Create a Security Group that allows type SSH on port 22 and HTTP on port 80.
• Download the .pem file (during setup) which we'll use to authenticate into your server via terminal.
• Modify permissions on the .pem file downloaded from AWS

$ chmod 0600 ~/Downloads/{your_key}.pem

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// WS2812_RFduino_Test
// By Thomas Olson
// No complicated Pixel Library needed.
// Tested with WS2812B 4 pin versions.
// Modified by Sam Decrock to resemble NeoPixel API
// Modified by http://jos.ph to incorporate more of NeoPixel examples
// 20160510 ... verified works with Arduino 1.6.5 and simblee module
// >>> using 3.3v > 5v level shifter between pin 6 and NeoPixels

const int ws2812pin = 6;

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char *in = "!%40%23%24%25%5e%26*()_%2b";
char *out = "000000000000000000000000000000";
void setup(){
  Serial.begin(9600);
  while(!Serial){
    ;
  }
  Serial.println(in);
  urldecode2(out,in);

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/* https://github.com/JChristensen/Timer */
#include <Timer.h>

Timer t_press;

int POWER_SNAP_BTN = 8;
int LED_1 = 13;
int LED_2 = 3;

int pressCount = 0;

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/Applications/Arduino.app/Contents/Java/hardware/tools/avr/bin/avrdude -C/Applications/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf -v -patmega328p -cstk500v2 -Pusb -e -Ulock:w:0x3F:m -Uefuse:w:0x05:m -Uhfuse:w:0xde:m -Ulfuse:w:0xff:m 

avrdude: Version 6.3, compiled on Jan 17 2017 at 12:01:35
         Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
         Copyright (c) 2007-2014 Joerg Wunsch

         System wide configuration file is "/Applications/Arduino.app/Contents/Java/hardware/tools/avr/etc/avrdude.conf"
         User configuration file is "/Users/jmsaavedra/.avrduderc"
         User configuration file does not exist or is not a regular file, skipping

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###ofGetAppPtr() example

from a .cpp file, for example, "particle.cpp" you can do two things:

• a) include "ofApp.h" (so you know what's inside the ofApp)
• b) cast the ofGetAppPtr as a ptr

you can't include ofApp.h inside another .h file, as you would recursive includes (ie, ofApp includes particle, particle includes ofApp), but putting it in the .cpp is fine.

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SD CARD IMAGE COPY AND RESTORE

---

great for RaspberryPi disk imaging and copying.

LOCATE AND UNMOUNT DISK

insert SD card into computer. to see all volumes mounted to machine:

$ diskutil list

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###mongodb quick CLI reference

db backup and restore

from any directory on host machine, export entire db

$ mongodump -db myDatabaseName #OSX
$ mongodump --db myDatabaseName -o C:\Users\someuser\Desktop #win

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{
  // http://eslint.org/docs/rules/

  "ecmaFeatures": {
    "binaryLiterals": false,                    // enable binary literals
    "blockBindings": false,                     // enable let and const (aka block bindings)
    "defaultParams": false,                     // enable default function parameters
    "forOf": false,                             // enable for-of loops
    "generators": false,                        // enable generators
    "objectLiteralComputedProperties": false,   // enable computed object literal property names

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string completeUpdate = "{\"requests\": [{\"method\": \"PUT\",\"path\": \"/1/classes/"+dbName+"/"+displayObjectId+"\",\"body\": "+ updateObj + "},{\"method\": \"PUT\",\"path\": \"/1/classes/"+dbName+"/"+displayObjectId+"\",\"body\": " + updateObj2 + "}]}";
string someId = "someIdString";

pushData(someId, completeUpdate);

void pushData(string someIdStr, string updateObjectStr){
 
    cout << "updating parse. objectId: "<<someIdStr<<endl;
    cout << "\tupdate object: "<<updateObjectStr<<endl;