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Robotics

Robotics. Bluetooth example Presentations Lab: building projects. Bluetooth. and all communication protocols Subject to timing variability. Sends and receives done on digital schedule, not continuously Message transmission is not instantaneous . My example. keybt Runs on master

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Robotics

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  1. Robotics Bluetooth example Presentations Lab: building projects

  2. Bluetooth and all communication protocols • Subject to timing variability. Sends and receives done on digital schedule, not continuously • Message transmission is not instantaneous

  3. My example • keybt • Runs on master • Loop: Waits for touch sensor, NXT left arrow, or NXT right arrow • When one is pressed, send BT 1, 2, or 3 • Displays number • getmsg • Runs on slave. Must be started first. • Loop to receive BT numeric message • Displays message

  4. keybt

  5. keybt

  6. getmsg

  7. Cautions • Make sure sending and receiving same datatype, in this case number • Also correct connection, correct mailbox. In this case, 1 (only connection) and 1. • The nbr variable initialized and reset to zero is used to signal if something has been pressed AND what has been pressed. • advantage of numbers • comparing numbers built in • There are text operations that can be downloaded from nxtasy: http://nxtasy.org/2007/05/30/text-manipulation-nxt-g-blocks/

  8. Suggestions (Do as I say, not as I just did…) • Make multiple block sections for display into MyBlocks • Experiment with pauses. More or less may be better. • ?

  9. Building projects • Do small experiments • Write out plans (logic) • Iterate

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