nodejs library to create senseBox Arduino Sketches

Usage no npm install needed!

<script type="module">
  import senseboxSketchTemplater from 'https://cdn.skypack.dev/@sensebox/sketch-templater';


senseBox sketch-templater

Arduino sketch templates used by the openSenseMap-api

Build Status NPM Version



Releasing a new version

On each commit, Travis CI builds and tests the package with this .travis.yml. If the commit has a Git tag, a new version of the package will be published to npm through travis.

To create a new version, use npm version.

  1. Document your changes in CHANGELOG.md. Make sure there are no uncommited changes in the worktree.
  2. Run npm version [major | minor | patch] -m "[v%s] Your commit message"
  3. Type in the new version (to create a beta release include the word beta in the new version)
  4. git push --tags origin master


Install via npm install --save @sensebox/sketch-templater or yarn add @sensebox/sketch-templater

const Sketcher = require('@sensebox/sketch-templater');

const mySketcher = new Sketcher('<your api post domain>');

// generate Sketch
const mySketch = mySketcher.generateSketch(box);
const mySketchBase64 = mySketcher.generateSketch(box, { encoding: 'base64' });


In order to fill in the correct ingress domain, you have to specify a valid hostname. Do not specify a protocol (http or https)!

You can do this either in code when calling the new Sketcher('your domain here') or through external configuration.

If your project is using lorenwest/node-config, you can specify the ingress domain in your config file of your project like this:

    ... your other config

    "sketch-templater": {
      "ingress_domain": "ingress.example.com"

Adding new Templates

To add new templates, just create a new .tpl file in the templates directory. A template consists of two parts. The first line contains a JSON object for configuration. The second line until the end is used as the template text.

Example configuration in first line

Specify a single model:

{ "model": "homeEthernet" }

Specify multiple models:

{ "models": ["homeWifi", "homeWifiFeinstaub"] }

Templating values

The templater uses special transformers to process the templates. The transformers are applied through searching for @@SUB_TEMPLATE_KEY@@ occurrences in the template files. Each replacement starts and ends with a double @. To specify a transformer, append a pipe (|) and the transformer name. When no transformer is specified, it just returns the input variable. For adding new template transformers, see Adding Transformers.

As of writing this, the following replacements can be made:

Template text Replacement
@@SENSEBOX_ID@@ the senseBox ID
@@SENSOR_IDS@@ sensor IDs
@@NUM_SENSORS@@ the number of sensors
@@INGRESS_DOMAIN@@ the domain of your ingress server
@@SERIAL_PORT@@ Serial port for connected SDS011 (only Feinstaub models)
@@SSID@@ the domain of your ingress server (only homeV2Wifi models)
@@PASSWORD@@ the domain of your ingress server (only homeV2Wifi models)
@@ACCESS_TOKEN@@ the access_token of wifi / ethernet boxes

Additionally, the following transformers are implemented:

Transformer name Description
as-is Do nothing.
toDefine Transform an array of sensors to multiple #define statements.
toProgmem Transform an array of sensors to multiple const char xxSENSOR_ID[] PROGMEM = "<id>"; statements.
digitalPortToPortNumber Transform a digital port (A, B or C) to a port number. You can add a offset parameter.

Adding Transformers

In order to add a new transformer, just add a function in src/transformers.js to the module.exports. The function should return a string.

Adding Replacements

Add your additional replacements in src/index.js in the method _cloneBox to the second parameter of the Object.assign call.


MIT 2017 Matthias Pfeil, Jan Wirwahn, Gerald Pape