This recipe provides steps to build a simple robot which knows distance between itself and objects near by. If any object gets closer than 10 cm, the robot will speak up asking for privacy.
- A Raspberry Pi B. I use Raspberry 3 for this tutorial, which has built-in wifi. If you have other models, need to make sure you have Wifi dongle or other ways to get your Pi connected to the internet (eg: sharing through ethernet, etc)
- HC-SR04 distance sensor
- 1K resistor
- Speaker. I use an Anker A7910 mini speaker
- IBM Bluemix account (free)
- Refer to this to know how to setup your Pi. Try to get the latest OS version.
- Git, Node.js, npm on your Raspberry:
sudo apt-get install nodejs npm node-semver
Login to Bluemix with your registered ID, Go to Catalog, Search for text to speech and select the service
Name the service and credential if you want, or just leave them by default, Select Create
Once the service is created, go to Service credentials , View credentials section to record the username and password information. You will need it later for the app. You can always create a new credential to access the service as needed, by selecting New credential
Clone the source code:
From your Raspberry Pi, perform this command to get the source code:
git clone https://github.com/dnguyenv/distance-bot.git
Put your Watson service credential into the config.js file. You also can configure other values in the file to meet your need.
Run the code:
cd distance-bot
npm install
npm start
Click here or on the picture below to see the demo:
