node-red-contrib-meraki-cmx

A Node-RED node to receive WiFi and Bluetooth beacon location data from a Cisco Meraki wireless network.

Install

Run the following command in your Node-RED user directory - typically ~/.node-red

npm i node-red-contrib-meraki-cmx

Restart Node-RED

node-red

Description

A Cisco Meraki Scanning API node to receive presence information from a Meraki WiFi network. Formely called CMX or Location API

Meraki WiFi access points will send their WiFi and Bluetooth beacon observations, via the Meraki cloud, to this node. The JSON stream will be available in the msg.payload object on the Data output.

Note: The access points must be placed appropriately on the map in the Meraki Dashboard.

Outputs

• Data

Sends the observation data msg.payload

{
    "version": "2.0",
    "secret": "supersecret",
    "type": "DevicesSeen",
    "data": {
        "apMac": "00:18:0a:13:dd:b0",
        "apFloors": [],
        "apTags": [
            "dev",
            "home",
            "test"
        ],
        "observations": [
            {
                "ipv4": "/192.168.0.56",
                "location": {
                    "lat": 51.5355157,
                    ...

• Status

Sends various topics depending on event status and additional parameters

{
    topic: "type"
    payload: "discarding radio type"
    remoteAddress: "127.0.0.1"
    _msgid: "913d6108.aadcf"
    supportedType: "BluetoothDevicesSeen"
    type: "DevicesSeen"
    statusCode: 200
}

More information on the Scanning/CMX Location API can be found on the Meraki Developers Portal. http://developers.meraki.com/tagged/Location

How it works

The Node requires the following configurations

Validator

• Used by Meraki to validate the receiver. The CMX Node will respond with the validator when Meraki performs a [GET] request to your server.

Secret

• Used by the CMX Node to ensure the JSON stream is from the appropriate sender.

URL

• The URL that will listen for the JSON stream. This path will be appended to the servers domain name and port. http://yourserver:port/URL

Note:

• Multiple Nodes with an identical URL will not function properly. Instead, use a "link" node to send the data to multiple flows.

Changelog

August 2017

• Fixed "invalid data" issue. (Heroku was impacted by this)
• Removed reference to msg object
• Handle invalid secret better.

July 2017

• Added Status output
• Return status codes
• Added Radio Type selector!
• Fixed validator key display in settings
• Housekeeping

Written by Cory Guynn, 2016(2017)

http://www.InternetOfLEGO.com

http://developers.meraki.com

Screenshots

Node Basic Flow

Node Settings

Meraki Dashboard AP Map Placement

Meraki Location Data on Worldmap

Sample Flow

[{"id":"8d0a63e4.7ff19","type":"debug","z":"9560177e.d80b58","name":"Data","active":true,"console":"false","complete":"payload","x":510,"y":120,"wires":[]},{"id":"e6a6b005.01677","type":"Meraki CMX","z":"9560177e.d80b58","name":"","url":"/scanning","settings":"","radioType":"BluetoothDevicesSeen","x":100,"y":140,"wires":[["8d0a63e4.7ff19","23f1e4d9.3149ec"],["a303ae76.9149d"]]},{"id":"6b254578.dfd17c","type":"debug","z":"9560177e.d80b58","name":"Status: Data","active":true,"console":"false","complete":"true","x":490,"y":200,"wires":[]},{"id":"aa97b7a4.7e4b18","type":"split","z":"9560177e.d80b58","name":"","splt":"\\n","spltType":"str","arraySplt":1,"arraySpltType":"len","stream":false,"addname":"topic","x":330,"y":520,"wires":[["5700cec1.0367b"]]},{"id":"cb89fe11.4c4b5","type":"function","z":"9560177e.d80b58","name":"Extract Observations","func":"// Flatten JSON\nmsg.type = msg.payload.type;\nmsg.apMac = msg.payload.data.apMac;\nmsg.apFloors = msg.payload.data.apFloors\nmsg.apTags = msg.payload.data.apTags;\nmsg.payload = msg.payload.data.observations;\n\nreturn msg;","outputs":1,"noerr":0,"x":240,"y":480,"wires":[["aa97b7a4.7e4b18"]]},{"id":"5700cec1.0367b","type":"debug","z":"9560177e.d80b58","name":"Observation","active":true,"console":"false","complete":"true","x":490,"y":520,"wires":[]},{"id":"a303ae76.9149d","type":"switch","z":"9560177e.d80b58","name":"","property":"topic","propertyType":"msg","rules":[{"t":"eq","v":"data","vt":"str"},{"t":"eq","v":"version","vt":"str"},{"t":"eq","v":"validator","vt":"str"},{"t":"eq","v":"secret","vt":"str"},{"t":"eq","v":"type","vt":"str"},{"t":"eq","v":"error","vt":"str"},{"t":"else"}],"checkall":"true","outputs":7,"x":290,"y":300,"wires":[["6b254578.dfd17c"],["53f245f.0b2c2bc"],["5287b886.c827f8"],["4668f0fa.353d8"],["7946f407.72013c"],["adce6018.ce8af"],["4c7a8875.a90598"]]},{"id":"5287b886.c827f8","type":"debug","z":"9560177e.d80b58","name":"Status: Validator","active":true,"console":"false","complete":"true","x":480,"y":280,"wires":[]},{"id":"4668f0fa.353d8","type":"debug","z":"9560177e.d80b58","name":"Status: Secret","active":true,"console":"false","complete":"true","x":480,"y":320,"wires":[]},{"id":"7946f407.72013c","type":"debug","z":"9560177e.d80b58","name":"Status: Type","active":true,"console":"false","complete":"true","x":490,"y":360,"wires":[]},{"id":"adce6018.ce8af","type":"debug","z":"9560177e.d80b58","name":"Status: Error","active":true,"console":"false","complete":"true","x":490,"y":400,"wires":[]},{"id":"4c7a8875.a90598","type":"debug","z":"9560177e.d80b58","name":"Status: Otherwise","active":true,"console":"false","complete":"true","x":470,"y":440,"wires":[]},{"id":"23f1e4d9.3149ec","type":"link out","z":"9560177e.d80b58","name":"Meraki Scanning","links":["21b70a5e.6a00c6"],"x":275,"y":160,"wires":[]},{"id":"21b70a5e.6a00c6","type":"link in","z":"9560177e.d80b58","name":"Split Observations","links":["23f1e4d9.3149ec"],"x":60,"y":480,"wires":[["cb89fe11.4c4b5"]]},{"id":"ae4f659c.475398","type":"comment","z":"9560177e.d80b58","name":"Workflow Examples","info":"","x":120,"y":440,"wires":[]},{"id":"53f245f.0b2c2bc","type":"debug","z":"9560177e.d80b58","name":"Status: Version","active":true,"console":"false","complete":"true","x":480,"y":240,"wires":[]},{"id":"e7a18191.9674a","type":"comment","z":"9560177e.d80b58","name":"Meraki Scanning Node - README","info":"Update the Meraki node with your Meraki Network's\nvalidator and secret","x":410,"y":60,"wires":[]}]