2 min read

Creating an Azure IoT Edge Typescript Module

Deploy a Typescript Azure IoT Edge module to your devices utilizing the latest such as swc and node v18
Creating an Azure IoT Edge Typescript Module
Photo by Ilya Pavlov / Unsplash

Let's learn how we can create a Typescript module in our Azure IoT Edge project!

⚠️ At the day of writing (15/NOV/2022) the IoT Edge ecosystem is under construction, I highly recommend to follow this entire post as the current shipped Node.js version is v10 (we are currently LTS on v18)


You can easily copy the code from this post from my Public Repository

PublicProjects/Azure-IoT-Edge/Typescript-and-Python-Modules-Communicating/modules/AudioInferencing at master · XavierGeerinck/PublicProjects
Contribute to XavierGeerinck/PublicProjects development by creating an account on GitHub.


  • A working IoT Edge solution and connected device
  • Working iotedgedev cli command
  • Basic understanding of Module development

Creating our Module

Out of the box, IoT Edge does not offer Typescript. So let's start by initializing the Nodejs boilerplate:

iotedgedev solution add --template nodejs AudioInferencing

This will initialize our project with the corresponding Docker build files and source code. Opening up the app.js file in the modules/AudioInferencing module that was created will reveal that it is all Javascript code so let's convert this to Typescript

Converting it to Typescript

In an earlier post I explained how we can initialize a Typescript project. This is the same! So, navigate to your modules/AudioInferencing module directory and run the commands

npm init -y

# Install Typescript, ts-node and nodemon
pnpm i -D typescript ts-node nodemon @types/node

# Install SWC for transpiling Typescript
pnpm i -D @swc/core @swc/helpers regenerator-runtime

# Generate TSConfig and adapt for SWC usage
npx tsc --init

# Configuring tsconfig.json
# note: we specify ./dist as output dir and ./src as input
sed -i 's%// "outDir": "./"%"outDir": "./dist"%' tsconfig.json
sed -i 's%// "rootDir": "./"%"rootDir": "./src"%' tsconfig.json

# Demo Hello World
mkdir src; echo 'console.log("Hello World");' > src/index.ts

and finally update the package.json to include our scripts:

    "name": "your_application",
    "version": "1.0.0",
    "description": "",
    "main": "index.js",
    "scripts": {
        "start": "ts-node --swc ./src/index.ts",
        "dev": "nodemon --watch './src/**/*.ts' --exec 'ts-node --swc' ./src/index.ts"
    "keywords": [],
    "author": "",
    "license": "ISC",
    "devDependencies": {
        "@swc/core": "^1.2.244",
        "@swc/helpers": "^0.4.11",
        "nodemon": "^2.0.19",
        "regenerator-runtime": "^0.13.9",
        "ts-node": "^10.9.1",
        "typescript": "^4.8.2"

When we run npm run start we will see our application being ran

Updating the Dockerfile

Finally, left to do is to update the Dockerfile. Just add this code:

FROM node:current-alpine


# Install Package.json dependendencies
COPY package.json .
RUN npm install -g npm@latest \
    && npm -v \
    && npm install

# Copy Source Code
COPY . .

USER node

CMD ["npm", "run", "start"]

and we are set to go! Rebuild your module and deploy it to your device to get started.