Speed of Jetbot Nano Teleoperation

[Neophyte628]

Hi,

Is there away to control the speed of the Jetbot nano during teleoperation? It moves a little too fast.

Also, how do I assign commands to the other controls on the GamePad

best

[tokk-nv]

Hi Neophyte628,

Which "vehicle" or the hardware kit are you using?

If that is Waveshare JetBot kit, discussions like below may help you.

• Suggested Speed Values for Waveshare Jetbot kit Suggested Speed Values for Waveshare Jetbot kit #353
• Slowing down the waveshare Jetbot Slowing down the waveshare Jetbot #377

For assigning functions on other buttons on your gamepad, you can refer to the notebook and check out the line below.

def save_snapshot(change):
    # save snapshot when button is pressed down
    ...

controller.buttons[5].observe(save_snapshot, names='value')

[Neophyte628]

I can change the speed through software, but i do not know how to modify the software for the gamepad to have motors run at slower speed, as in the software below

left_link = traitlets.dlink((controller.axes[1], 'value'), (robot.left_motor, 'value'), transform=lambda x: -x)
right_link = traitlets.dlink((controller.axes[3], 'value'), (robot.right_motor, 'value'), transform=lambda x: -x)

[Neophyte628]

I think I answered my question -- the following enables the jetbot to run at a controllable speed.

#Create buttons to slow/speed-up jetbot when in teleoperation mode

theScale=.5

def callSlowDown(change):
global theScale
if change['new']==1:
theScale=0.8*theScale
#print(theScale)

def callSpeedUp(change):
global theScale
if change['new']==1:
theScale=1.25*theScale
#print(theScale)

controller.buttons[0].observe(callSpeedUp,names='value')
controller.buttons[2].observe(callSlowDown,names='value')

#attach controls to robot

robot = Robot()

left_link = traitlets.dlink((controller.axes[1], 'value'), (robot.left_motor, 'value'), transform=lambda x: -theScalex)
right_link = traitlets.dlink((controller.axes[5], 'value'), (robot.right_motor, 'value'), transform=lambda x: -theScalex)

#Create buttons to slow/speed-up jetbot when in teleoperation mode

theScale=.5

def callSlowDown(change):
global theScale
if change['new']==1:
theScale=0.8*theScale
#print(theScale)

def callSpeedUp(change):
global theScale
if change['new']==1:
theScale=1.25*theScale
#print(theScale)

controller.buttons[0].observe(callSpeedUp,names='value')
controller.buttons[2].observe(callSlowDown,names='value')

#attach controls to robot

robot = Robot()

left_link = traitlets.dlink((controller.axes[1], 'value'), (robot.left_motor, 'value'), transform=lambda x: -theScalex)
right_link = traitlets.dlink((controller.axes[5], 'value'), (robot.right_motor, 'value'), transform=lambda x: -theScalex)

[Neophyte628]

left_link = traitlets.dlink((controller.axes[1], 'value'), (robot.left_motor, 'value'), transform=lambda x: -theScalex)
right_link = traitlets.dlink((controller.axes[5], 'value'), (robot.right_motor, 'value'), transform=lambda x: -theScalex)

[Neophyte628]

theScale * x