Meraki SSID Crypto Ticker

Ever wanted BTC or ETH prices available at a moment's notice from any WiFi enabled device? Look no further!

This application uses the Cisco Meraki Cloud APIs to set the SSID of a wireless network you control to the current BTC and/or ETH price with their current upward or downward 24-hour trend and percent change. Any and all cryptocurrency information is pulled from CoinMarketCap's public API and formatted one of many available national currencies.

Modes

The ticker can be run in one of two modes:

Cron Mode: run the application as a one-off command in intervals from your system crontab using the -cron flag
Service Mode: run the application with no flags and background it so it'll run forever (or until it hits an error and crashes...)

Configuration

First of all, you obviously need control of a Meraki network with at least one active access point. This guide assumes you have knowledge of the Meraki cloud dashboard. It won't teach you how to create new SSIDs or any of that junk.

Make sure you clone this repo to $GOPATH/src/github.com/dechristopher/meraki-ap-crypto-ticker if you plan to build the application yourself otherwise the dependeices won't pull properly. Pre-compiled builds can be found in the releases section. If using a pre-compiled build, skip steps 11 and 12 and just run the application binary after following steps 1-10

That in mind, here are the steps to configuring the application to do our bidding:

Enable the Merkai API at the bottom of the Organization > Settings Page.
Generate an API key on the Edit Account Page
Create a new SSID under the Wireless > SSIDs Page. Name it whatever you want because it'll be renamed promptly by the application. Ensure it's secured properly and implement any firewall rules and traffic shaping as you see fit. This network shouldn't have any devices connect to it ever, so just fire and forget some obnoxiously long PSK.
At this point you need to hit the API to get your Organization ID and your Network ID. Get the organization ID with this query. Be sure to fill in your API key header:

curl -L -H 'X-Cisco-Meraki-API-Key: <key>' -X GET -H 'Content-Type: application/json' 'https://api.meraki.com/api/v0/organizations'

It'll return something like this, note the id field in each object is what we're after:

[
  {
    "id":1234,
    "name":"My org"
  }
]

Use the organization ID you just pulled to find the network ID of the network that contains the SSID you're using for the ticker. Be sure you fill in the API key and organization ID before running the command:

curl -L -H 'X-Cisco-Meraki-API-Key: <key>' -X GET -H 'Content-Type: application/json' 'https://api.meraki.com/api/v0/organizations/[organizationId]

It'll return something like this, note the id field in each object is what we're after:

[
  {
    "id":"N_1234",
    "organizationId":"1234",
    "type": "wireless",
    "name":"My network",
    "timeZone": "US/Pacific",
    "tags": null
  }
]

Now you'll need to find the SSID number of the SSID that'll act as the ticker. This one's easy. Just go in and edit the SSID's settings in the Meraki Cloud Dashboard and the number will be in the last part of the URL as shown here:
At this point we have all the information to allow the application to do its business. Make a copy of the config.example.json and call it config.json. Take your Meraki API key along with the NetworkID and SSID number we gathered and store them in the config.json as such:

{
    "apikey": "API_KEY_HERE",
    "networkid": "NETWORK_ID_HERE",
    "ssidnum": "SSID_NUMBER_HERE",
    ...
}

Enable the cryptocurrencies you'd like to see and set your currency code using the other configuration options in config.json, setting them to true as shown here:

{
    "apikey": "API_KEY_HERE",
    "networkid": "NETWORK_ID_HERE",
    "ssidnum": "SSID_NUMBER_HERE",
    "btc": true,
    "eth": false,
    "currency": "USD",
    "interval": 1
}

Supported currency codes are: "AUD", "BRL", "CAD", "CHF", "CLP", "CNY", "CZK", "DKK", "EUR", "GBP", "HKD", "HUF", "IDR", "ILS", "INR", "JPY", "KRW", "MXN", "MYR", "NOK", "NZD", "PHP", "PKR", "PLN", "RUB", "SEK", "SGD", "THB", "TRY", "TWD", "ZAR"

Before we can compile, we need to ensure we've got all the dependencies. To do this, make sure you're in the project src directory and run:

go get ./...

We're home free! Just build the application using tools/build-(platform).sh and run the application using ./ticker located in the build directory
Within seconds you should see the SSID set to the current crypto prices that you have enabled. They'll be formatted like this:

BOTH Enabled:

[BTC ↑ $13.4k] [ETH ↑ $481]

Only one enabled:

(BTC) ↑ $13,416 [+7.4%]
or
(ETH) ↑ $481 [+9.1%]

Additional Information

By default the application updates the prices once every minute in service mode. This can be changed using the interval configuration option. The value is set in minutes.

Contributing

PLEASE contribute to this project. I know it's a novelty, but it's got some interesting solutions to novelty engineering problems that nobody thinks of...

That said, if there are issues, I'd love to know. Submit an issue or a PR if you're a proactive problem solver.