Mol: /* Theory */

2020-11-02T20:34:15Z

Theory

← Older revision		Revision as of 23:34, 2 November 2020
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	== Theory ==		== Theory ==

			[[File:Ev3G BT simpleRobot.png\|thumb\|The three loops are ready for change.]]
	The following Python script needs to be run and after that the EV3-G code.		The following Python script needs to be run and after that the EV3-G code.

Mol: /* Exercises */

2020-11-02T20:29:59Z

Exercises

← Older revision		Revision as of 23:29, 2 November 2020
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	== Exercises ==		== Exercises ==

			#Robot steers into a wrong direction. Fix that.

Mol: /* Theory */

2020-11-02T20:28:59Z

Theory

← Older revision		Revision as of 23:28, 2 November 2020
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	self.master.bind('<Up>', self.upKey)		self.master.bind('<Up>', self.upKey)
	self.master.bind('<Down>', self.downKey)		self.master.bind('<Down>', self.downKey)


	self.canvas = tk.Canvas(self.master, width=200, height=20)		self.canvas = tk.Canvas(self.master, width=200, height=20)

Mol: Created page with "== Introduction == We create a a simple keyboard and mouse controlled robot. The data is transferred using Bluetooth (EV3BT package). We use TkInter and Python3. == Robot =..."

2020-11-02T20:28:33Z

Created page with "== Introduction == We create a a simple keyboard and mouse controlled robot. The data is transferred using Bluetooth (EV3BT package). We use TkInter and Python3. == Robot =..."

New page

== Introduction ==

We create a a simple keyboard and mouse controlled robot. The data is transferred using Bluetooth (EV3BT package). We use TkInter and Python3.

== Robot ==

Almost any robot will do. We use Verne 2/ Asimov.

== Theory ==

The following Python script needs to be run and after that the EV3-G code.

<syntaxhighlight lang="python">
import tkinter as tk
import time
import EV3BT
import serial

class App(object):
def __init__(self, master, **kwargs):
self.master = master
self.master.bind('<Left>', self.leftKey)
self.master.bind('<Right>', self.rightKey)
self.master.bind('<Up>', self.upKey)
self.master.bind('<Down>', self.downKey)

self.canvas = tk.Canvas(self.master, width=200, height=20)
self.canvas.pack()

self.power = tk.Scale(self.master,from_=-100,to=100)
self.power.pack()

self.steering = tk.Scale(self.master,from_=-100,to=100,
orient=tk.HORIZONTAL)
self.steering.pack()

self.steeringTime = 0

#
#
self.EV3 = serial.Serial('/dev/rfcomm0')

self.master.after(0, self.update)

def leftKey(self, event ):
self.steering.set( self.steering.get() - 5)
self.steeringTime = time.time()
def rightKey(self, event ):
self.steering.set( self.steering.get() + 5)
self.steeringTime = time.time()

def upKey(self, event ):
self.power.set( self.power.get() - 5)
def downKey(self, event ):
self.power.set( self.power.get() + 5)

def update(self):
s = EV3BT.encodeMessage(EV3BT.MessageType.Numeric, 'power',
self.power.get() )
self.EV3.write(s)

s = EV3BT.encodeMessage(EV3BT.MessageType.Numeric, 'steering',
self.steering.get() )
self.EV3.write(s)

if time.time() - self.steeringTime > 1:
self.steering.set(0)

self.master.after(100, self.update )

root = tk.Tk()
app = App(root)
root.mainloop()
</syntaxhighlight>

== Video ==

== Exercises ==

Raspberry Pi Bluetooth controlled steerable robot - Revision history

Mol: /* Theory */

Mol: /* Exercises */

Mol: /* Theory */

Mol: Created page with "== Introduction == We create a a simple keyboard and mouse controlled robot. The data is transferred using Bluetooth (EV3BT package). We use TkInter and Python3. == Robot =..."