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Install redis

Use homebrew:

    $ brew install redis

Redis config is here: /usr/local/etc/redis.conf

Starting redis

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Using Alexa to Open and Close your garage door

This guide assumes a functioning Zwave garage door opener configured with Smartthings. As of this writing Alexa does not support opening and closing garage doors natively. So, some sorcery is required.

Create a routine that opens your garage

Just create a routine, say, "Open garage door" and configure it open your garage door.

Create a routine that closes your garage

Just create a routine, say, "Close garage door" and configure it open your garage door.

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Install homebrew

brew.sh

Install cmake and qt

$ brew install cmake qt

Install XCode

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Unique Constraints in Cassandra

Cassandra is a NoSQL database, and is meant for different applications than traditional relational databases. Nevertheless, developers will want (and try) to implement RDBMS features in Cassandra. Unique constraints is one such example.

Many people have asked about creating unique constraints in Cassandra: 1, 2, 3, 4. There is no definitive answer. The most popular answer seems to be to not even try it. Square peg, round hole. If you need unique constraints, Cassandra may not be the tool for the job. Others have suggested to use LWT/CAS. It should be noted that, simply using LWT/CAS does not give us reliable unique constraints that we get i

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Prerequisites

• Smartthings Hub
• You have the $25 plan from simplisafe

Step 1: Create a Device Handler (for Simplisafe)

• Login to the smartthings IDE
• Click on 'My Device Handlers'
• Click on 'Create new Device Handler'
• Click on 'From Code' Tab
• Paste the code from: https://github.com/foxxyben/foxxyben-smartthings/blob/master/devicetypes/tobycth3/simplisafe.src/simplisafe.groovy

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#Step 1: Update /etc/postfix/main.cf

$ sudo vim /etc/postfix/main.cf

Add the following lines, anywhere really, but preferably under the relayhost section:

relayhost = smtp.gmail.com:587
smtp_sasl_auth_enable = yes