rodi-web

A web-service interface for Gary Servin's RoDi (Robot Didáctico inalámbrico) wireless robot. Allows programmers to control RoDi by simply using HTTP requests, ie., from a web browser, a bash script, and basically any programming language.

API

• Blink

  GET /1/<rate-in-milliseconds>/
  

  ie.,

  curl --get http://192.168.4.1:1234/1/1000/ // blink each second
  curl --get http://192.168.4.1:1234/1/0/    // stop blinking
  

• Sense

  GET /2/
  

  Returns a JSON formatted array of two integers, for left and right sensor values.

  ie.,

  $curl --get http://192.168.4.1:1234/2/
  [62, 66]
  

• Move

  GET /3/<left-wheel-speed[-100:100]>/<right-wheel-speed[-100:100]>/
  

  ie.,

  $curl --get http://192.168.4.1:1234/3/0/0/          // stop
  $curl --get http://192.168.4.1:1234/3/100/-100/     // turn right
  $curl --get http://192.168.4.1:1234/3/-100/100/     // turn left
  $curl --get http://192.168.4.1:1234/3/100/100/      // forward
  $curl --get http://192.168.4.1:1234/3/-100/-100/    // backward
  

  100 moves wheel forward at full speed -100 moves wheel backward at full speed

• Sing

  GET /4/<note>/<duration>
  

  ie.,

  curl --get http://192.168.4.1:1234/4/31/250/ // blink each second
  

  Notes can be found in http://arduino.cc/en/tutorial/tone

• See

  GET /5/
  

  Returns a JSON formatted integer, for the distance in centimeters.

  ie.,

  $curl --get http://192.168.4.1:1234/5/
  13
  

• Pixel

  GET /6/<red>/<green>/<blue>
  

  Set the color of the onboard RGB led (pixel)

  ie.,

  $curl --get http://192.168.4.1:1234/6/0/0/0/        // off
  $curl --get http://192.168.4.1:1234/6/255/0/0/      // red
  $curl --get http://192.168.4.1:1234/6/0/255/0/      // green
  $curl --get http://192.168.4.1:1234/6/0/0/255/      // blue
  $curl --get http://192.168.4.1:1234/6/255/255/255/  // white
  

• Sense Light

  GET /7/
  

  Returns a JSON formatted integer, for the light intensity level (0 - 1023).

  ie.,

  $curl --get http://192.168.4.1:1234/7/
  66
  

• Led

  GET /8/<state[0|1]>
  

  Turns the onboard led on or off.

  ie.,

  curl --get http://192.168.4.1:1234/8/0/    // turns the onboard led off
  curl --get http://192.168.4.1:1234/8/1/    // turns the onbboard led on
  

• IMU

  GET /9/
  

  Returns a JSON formatted array of seven integers, for IMU sensor values.

  All values are from in the range [-32768:32767]: - X-axis acceleration (~16384 = 1g) - Y-axis acceleration (~16384 = 1g) - Z-axis acceleration (~16384 = 1g) - X-axis angular velocity - Y-axis angular velocity - Z-axis angular velocity - Temperature (degrees C * 10)

  ie.,

  $curl --get http://192.168.4.1:1234/9/
  [-268, 8, -268, -371, -449, -51, 284]
  

Authors

• Martin Abente Lahaye - tch@sugarlabs.org
• Gary Servin - garyservin@gmail.com

Cool Stuff

I recommend Turtle Blocks Javascript as a client for RoDi-web. Grab the latest bits from https://github.com/walterbender/turtleblocksjs. Don't forget to load the RoDi plugin!