MMM-CommandToNotification

MagicMirror² module which periodically calls configured scripts and sends the output as value of configurable notifications. The values can be displayed in modules like MMM-ValuesByNotification.

Example scripts to read the temperature values of DHT11, DHT22, DS18B20, HTU21 or BME280 connected to the raspbarry or Miflora sensors in reach of bluetooth are included in the scripts directory. There is a documentation in the scripts directory, too.

Basic installation

cd ~/MagicMirror/modules
git clone https://github.com/Tom-Hirschberger/MMM-CommandToNotification
cd MMM-CommandToNotification
npm install

Basic configuration

Add the following code to your ~/MagicMirror/config/config.js:

  {
   module: "MMM-CommandToNotification",
   disabled: false,
   config: {
    commands: [
    ]
   },
  },

General

Option	Description	Type	Default
updateInterval	How often should the scripts be iterated (in seconds)	Integer	30
commands	A array containing the command definition objects	Array	[]
sync	Should the commands called one by one (true) or should all be started as fast as possible (false). Can be overriden for each command in the command configuration	Boolean	true
debug	This flag controls if debug messages should be output on the console	Boolean	false

Commands

Option	Description	Mandatory	Type	Default
script	Either a absolute path or the realtive path of a script starting at the "scripts" directory.	true	String	null
args	Arguments which should be passed to the script	false	String	""
timeout	Should the script be killed if it does not return within a specific amount of milliseconds?	false	Integer	infinity
notifications	A array containing names of the notifications to send if script returns output. If not present the script gets called but no notification will be send. If you want to override the payload instead of using the output please look at the notification section.	false	Array	[]
sync	Should the command by run synchronous (next command will be called after this one, true) or asynchronous (directly proceed with the next one and process output when the command finishes, false)	Boolean	true
delayNext	Wait some amount of time (milliseconds) before the next command will be processed after this one has called. Make sure to set to updateInterval of the module to a value that is enough time to call and process all commands with all delays summed up!	Integer	0
conditions	A map containing conditions that need to match to send the notifications	false	Map	null

Notifications

The notifications array contains all notifications that should be send if a command is called (and the conditions matched). There may be situations where you want send a notification with a specific payload instead of the output of the script. You can do so if you specify a array instead of the string identifiying the notification. Lets see the following example:

notifications: [
  ["TEST1","MY_NEW_PAYLOAD"],
  "TEST2",
],

In this example the notification "TEST1" will have "MY_NEW_PAYLOAD" as output while "TEST2" contains the output of the command.

Conditions

All conditions specified need to match to send notifications!

Option	Description	Type	Default
returnCode	Specify either a single return code or a array of return codes that need to match. If a array is specified one of the values need to match (or condition).	Integer or Array of Integer	null
outputContains	Specify either a single string or a array of possible strings which of one need to be present in the output (or condition).	null

Example

Add the following example to produce the following result:

• the scripts will be iterated every 10 seconds
• the script "scripts/randomInteger.js" gets called every iteration
  • a random number between -10 and 10 is produced
  • the timeout of the script is 5 seconds. If the script does not produce any output within 5 seconds the call will be aborted and no notifications will be send
  • if the script produces output the output will be send as payload of the notifications TEST1 and TEST2
• the script "scripts/randomNumberJson.js" will be called every fourth iteration because a three skips are configured
  • the script calculates a random number between -50 and 20 and produces a json object containing two values ("integer" and "float"). The float value is the random number the integer value the random number rounded as integer.
  • the timeout of the script is set to 10 seconds
  • the result of the script (JSON object as string) will be send as payload of notification TEST3 while TEST4 will be send with payload "true"
  • As the condition returnCode is set to [0,1,2] the notifications TEST3 and TEST4 only will be send if the script ./randomNumberJson.js only will be send if the script exits with code 0, 1 or 2

  {
   module: "MMM-CommandToNotification",
   disabled: false,
   config: {
    updateInterval: 10,
    commands: [
     {
      script: "./randomInteger.js",
      args: "-10 10",
      timeout: 5,
      notifications: [
       "TEST1",
       "TEST2",
      ],
     },
     {
      script: "./randomNumberJson.js",
      args: "-50 20",
      skips: 3,
      timeout: 10,
      conditions: {
        returnCode: [0,1,2]
      }
      notifications: [
       "TEST3",
       ["TEST4", true]
      ],
     }
    ]
   },
  },

My Prusa MK4 3D-Printer setup