Controlling the Robot with Snap!
Communication from a web environment: Snap!
As we have already seen in the previous unit, it is possible to communicate with the ED1 board through web requests (REST) thanks to the fact that we can start a web server on it.
The web browser is not the only one that can make this type of request, they can also be made from other applications.
In this unit we will see how to control the robot from Snap!.
Sending commands from Snap!
Snap! is a block programming environment very similar to Scratch but which allows you to create more complex projects, thanks to the fact that it includes more advanced instructions than this one.
One of these instructions, the
url _block,allows web requests to be made in the same way as if they were made through the browser bar.
NOTE: for some reason it does not work in the Chrome browser and its derivatives, so it is recommended to use Firefox**.
Challenge 1: Control the robot with url blocks.
Solution to challenge 1
Challenge 2: Control the robot with the arrow keys on your keyboard.
Solution to challenge 1
- It is also possible to control the robot with another MicroBlocks compatible board that supports WiFi, using the
http:// _block from the Client HTTP library in the Network folder.
- We will learn simpler ways to connect with Snap! later.
This activity is part of the Citilab Course.
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