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Robu.in | Indian Online Store | RC Hobby | Robotics
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      • Component Kit
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      • Microcontroller ICs
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      • Upto 3 Inch
      • 3 Inch to 7 Inch
      • 8 Inch to 10 Inch
      • 11 Inch and Above
      • Carbon Fiber Propeller
      • Triblades
      • Propeller Accessories
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    • Creality 3D Printers
    • Electronics Parts
      • 3D Printer Display and Controllers
      • 3D Printer Extruder Kit
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      • Limit Switch
    • Mechnical Parts
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      • Lead Screw and Nut
      • Linear Guide Rail
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      • 3S Lipo (11.1V ~ 12.6V)
      • 4S Lipo (14.8V ~ 16.8V)
      • 6S LiPo (22.2V ~ 25.2V)
    • Orange LiPO Battery
      • 1 Cell (3.7-4.2)V
      • 2 Cell (7.4-8.4)V
      • 3 Cell (11.1-12.6)V
      • 4 Cell (14.8-16.8)V
      • 6 Cell (22.2-25.2)V
    • Micro LiPo Batteries
    • Lithium-Ion Batteries
      • 1 cell (3.7V~4.2V)
      • 2 Cell (7.4V~8.4V)
      • 3 Cell (11.1V~12.6V)
      • 4 Cell (14.8V~16.8V)
      • 5 Cell (18.5V) & Above
    • Orange Premium BMS
    • Other Batteries
      • TX/RX Li-PO Batteries
      • LifePO4 Battery
      • Coin Cell Battery
      • CNC and PLC Machine Battery
    • Battery Accessories
      • Battery Protection Board
      • Battery Pack Accessories & Holders
      • Battery Chargers
      • Battery Connector
      • Battery Harness
      • Power Adapter and Cable
      • Lipo Voltage Checker
      • Parallel Charging Board
      • LiPO Battery Sack, Covers & Mats
  • Motors, Drivers, Actuators
    • Planetary Gear Motor
      • Orange Planetary Gears Motor
      • Orange Planetary BLDC Motors
      • Planetary Gear DC Motors
    • Brushed DC Motor
      • Orange Johnson Geared Motor
      • Johnson Geared Motor (Grade B)
      • DC Geared Motor with Encoder
      • 25 GA Motors
      • Orange OG 555 DC Motor
      • RS 50 Geared Motor
      • Orange RS 775 DC Motor
      • Orange PM33 Motor
      • Orange Square Gear Box Motor
      • Orange Rectangular Gearbox Motor
    • N20 Micro Gear Motor
      • Micro Gear Motor with Encoder
      • Micro Gear Motor without Encoder
    • Stepper Motor
    • Servo Motors
      • Orange RC Servo Motors
      • Emax Servo Motor
      • Other Servo motor
    • Pumps
      • Kamoer High Quality Pumps and Accessories
      • Generic Pumps
      • Pneumatic Connectors and Valves
    • Cooling Fans
    • Linear Motor/Actuator
    • Solenoids & Electromagnets
    • Other DC Motors
      • BO Motors
      • Metal Gear Box Motor
      • Plastic Gear Box Motors
      • Vibration Motor
      • Drone Motor
    • Motor Drivers
      • Brushed DC Motor Driver
      • Servo Motor Driver
      • Stepper Motor Drivers
      • Brushless DC Motor Driver (ESC)
    • Motor Accessories
      • Motor Mounting Brackets
      • Bearings
      • Couplings
      • JR Servo Cable
      • Futaba Servo Cable
      • Push Rod
      • Other Accessories
  • Development Board
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      • Original Arduino Boards
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  • Official Arduino Boards
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    • Seven Segment LED Display
    • LED Dot Matrix Display
  • Sensors
    • Sensor Kits
    • Ultrasonic and Proximity
      • MAXBOTIX Ultrasonic Sonar
      • Ultrasonic Sensor
      • Orange Proximity Sensor
      • Autonics Proximity Sensor
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      • LiDAR Sensor
      • Other Ultrasonic Sensors
    • Temp., Humidity, Gas & Environmental
      • Temperature & Humidity Sensor
      • Environmental Sensors
      • Gas and Dust Sensor
      • Thermoelectric Cooler
    • Motion, Light and Sound
      • PIR / IR and Optical Sensor
      • RFID Card, Tags & Reader
      • Light/Color Sensor
      • Line Sensor
      • Sound Sensor
    • Biometric, Rotation, and Current
      • Biometric/ECG/EMG Sensor
      • Rotary Encoder
      • Current and Voltage
    • Load, Pressure, Flow & Vibration
      • Water TDS, pH, Flow, Level and Pressure Sensor
      • Vibration/Tilt Sensor and Modules
      • Load / Pressure / Force / Flex Sensor
  • Cameras
    • IoT Cameras
    • FPV Cameras
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    • Raspberry Pi Camera
  • IoT and Wireless
    • Ai Thinker ESP Modules and Development Boards
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    • Development Board/Kit
    • xBee Zigbee Module
    • LORA WiFi
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    • Wireless Smart Switches
  • Electronic Modules
    • Programming Module
    • Memory Interfacing
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    • Bluetooth Interfacing
    • Ethernet Module
    • Interface Module
    • LED Module
    • LASER Module
    • Addressable LED and Drivers
    • Breakout Board
    • Relay Switch Modules
    • Electronic Switches/Keypads
    • Solar Panels and Controllers
    • Wearable Electronic
    • Real Time Module (RTC)
    • Audio Module/ Amplifier
    • Mux-DeMux & Logic Converter
    • Voltage Regulator
      • Boost Converter (Step-Up )
      • Buck Converter (Step-Down)
    • Measuring Instruments
      • Digital Multimeter
      • Temperature Meter
      • Digital Voltage, Current and Frequency Meter
      • Oscilloscope & Signal Generator
      • Other Measuring Instrument
    • Power Supply
      • Transformers
      • SMPS
      • Hi-Link Power Supply Module
    • Displays
  • Wires and Cables
    • PVC and Silicone Wires
      • PVC Wire
      • 6 to 10 AWG
      • 12 to 16 AWG
      • 18 to 22 AWG
      • 24 to 30 AWG
    • Cables
      • DuPont / Jumper Cable
      • Interfacing Cables
      • JR Servo cable
      • Futaba servo cable
      • FFC Cable
    • Heat Shrink Tubing / Sleeve
      • Heat Shrink Combos
      • 1 mm to 4 mm
      • 5 mm to 10 mm
      • 11 mm and Above
      • PVC Heat Shrink
    • Tools and Accessories
      • Wire Cutter / Stripper
      • Cable Ties
      • Sleeves and Drag Chain
  • Mechanical Components and Workbench Tools
    • Mechanical Robotic Parts
      • Chassis
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • Lead Screw
      • Linear Guide Rail
      • Couplings
      • Bearings
      • Motor Mounting Brackets
      • Gears
    • Wheels
      • Mecanum Wheels
      • Omni Wheels
      • Heavy Duty Wheel
      • RC Car Wheel
      • Pulley Wheel & Track Belt
      • Caster Wheels
    • Carbon Fiber
      • Carbon Fiber Sheets and Strips
      • Carbon Fiber Tubes and Rods
    • Nuts-Bolts and Spacers
      • Countersunk(CSK) Screws
      • Socket Set Screws (Allen Grub)
      • Socket Head Cap Screw (Allen Bolt)
      • CHHD Screws
      • Nut and Washers
      • Nylon Nuts and Bolts
      • Spacer and Standoff
    • Soldering Tools
    • Workbench Tools
  • Services
    • PCB Manufacturing Service
    • Custom Battery Pack
    • Online SLA 3D Printing Service
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All Categories
  • Shop by Brands
  • New Arrivals
  • Refurbished
  • Partial Working
  • Electronic Components
    • Basic Electronic Components
      • Component Kit
      • Resistor
      • Inductor
      • Capacitor
      • Diode
      • Transistor
      • Crystal Oscillators
    • Semiconductor ICs
      • Microcontroller ICs
      • Interface ICs
      • Clock, Timer and Counter ICs
      • Sensor ICs
      • Optocoupler ICs
      • Converter ICs
      • Comparator ICs
      • Driver ICs
      • Encoder ICs
      • Audio ICs
      • IC Base
    • LEDs and Indicators
      • LEDs Kit
      • Pilot Lamp Indicator
      • LEDs with Holders
      • Through Hole LED
      • SMD LED
    • Miscellaneous Component
      • Potentiometer
      • Fuse
      • Buzzer/Speaker
      • Aluminium Heat Sink
      • Bread Board and Zero PCB
    • Mechanical Switches
    • Power Connectors
    • RF Connectors
    • Interface Connector
    • Berg / FPC / IDC Connector
  • DIY Learning and Robot Kits
    • Orange Premium Learning Kits
      • Orange Kits for Arduinos
      • Orange Kits for Raspberry Pi
      • Orange Electronic Component Kits
      • Orange DIY Mini Project Kits
    • DIY Hobby Project Parts
    • Robot Kits and Parts
    • Drone Kit
    • DIY 3D Printer Kits
    • Ebike Kit
    • Official Raspberry Pi Kits
    • Kits compatible with Arduino
    • Sensor Kits
    • Component Kit
  • Drone Parts
    • Kits
    • Frames and Accessories
    • Flight Controller & Accessories
    • Motors
    • Speed Controllers (ESC)
    • Propellers
      • Upto 3 Inch
      • 3 Inch to 7 Inch
      • 8 Inch to 10 Inch
      • 11 Inch and Above
      • Carbon Fiber Propeller
      • Triblades
      • Propeller Accessories
    • Drone Transmitter & Receiver
    • Antennas
    • FPV Cameras
    • FPV Antennas and Trans-Receivers
    • Accessories
    • Camera Gimbal
  • E-Bike Parts
    • Ebike Kit
    • Ebike Motor and Controller
    • Ebike Battery
    • Mechanical Accessories
    • Electronics Accessories
  • 3D Printers and Parts
    • Creality 3D Printers
    • Electronics Parts
      • 3D Printer Display and Controllers
      • 3D Printer Extruder Kit
      • 3D Printer Extruder Parts and Fans
      • Stepper Motors and Accessories
      • 3D Printer Display and Controller
      • Limit Switch
    • Mechnical Parts
      • 3D Printer Heatbed and Accessories
      • 3D Printer Nozzle
      • Lead Screw and Nut
      • Linear Guide Rail
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • 3D Printer Couplings
      • Timing Belt and Pulley
      • Sleeves and Drag Chain
    • 3D Printer Filaments
      • ORANGE Premium Filaments
      • ESUN Filaments
      • Resins
  • Batteries, Chargers and Accessories
    • Custom Battery Pack
    • Lemon Premium Li-PO Battery
      • 2S Lipo (7.4V ~ 8.4V)
      • 3S Lipo (11.1V ~ 12.6V)
      • 4S Lipo (14.8V ~ 16.8V)
      • 6S LiPo (22.2V ~ 25.2V)
    • Orange LiPO Battery
      • 1 Cell (3.7-4.2)V
      • 2 Cell (7.4-8.4)V
      • 3 Cell (11.1-12.6)V
      • 4 Cell (14.8-16.8)V
      • 6 Cell (22.2-25.2)V
    • Micro LiPo Batteries
    • Lithium-Ion Batteries
      • 1 cell (3.7V~4.2V)
      • 2 Cell (7.4V~8.4V)
      • 3 Cell (11.1V~12.6V)
      • 4 Cell (14.8V~16.8V)
      • 5 Cell (18.5V) & Above
    • Orange Premium BMS
    • Other Batteries
      • TX/RX Li-PO Batteries
      • LifePO4 Battery
      • Coin Cell Battery
      • CNC and PLC Machine Battery
    • Battery Accessories
      • Battery Protection Board
      • Battery Pack Accessories & Holders
      • Battery Chargers
      • Battery Connector
      • Battery Harness
      • Power Adapter and Cable
      • Lipo Voltage Checker
      • Parallel Charging Board
      • LiPO Battery Sack, Covers & Mats
  • Motors, Drivers, Actuators
    • Planetary Gear Motor
      • Orange Planetary Gears Motor
      • Orange Planetary BLDC Motors
      • Planetary Gear DC Motors
    • Brushed DC Motor
      • Orange Johnson Geared Motor
      • Johnson Geared Motor (Grade B)
      • DC Geared Motor with Encoder
      • 25 GA Motors
      • Orange OG 555 DC Motor
      • RS 50 Geared Motor
      • Orange RS 775 DC Motor
      • Orange PM33 Motor
      • Orange Square Gear Box Motor
      • Orange Rectangular Gearbox Motor
    • N20 Micro Gear Motor
      • Micro Gear Motor with Encoder
      • Micro Gear Motor without Encoder
    • Stepper Motor
    • Servo Motors
      • Orange RC Servo Motors
      • Emax Servo Motor
      • Other Servo motor
    • Pumps
      • Kamoer High Quality Pumps and Accessories
      • Generic Pumps
      • Pneumatic Connectors and Valves
    • Cooling Fans
    • Linear Motor/Actuator
    • Solenoids & Electromagnets
    • Other DC Motors
      • BO Motors
      • Metal Gear Box Motor
      • Plastic Gear Box Motors
      • Vibration Motor
      • Drone Motor
    • Motor Drivers
      • Brushed DC Motor Driver
      • Servo Motor Driver
      • Stepper Motor Drivers
      • Brushless DC Motor Driver (ESC)
    • Motor Accessories
      • Motor Mounting Brackets
      • Bearings
      • Couplings
      • JR Servo Cable
      • Futaba Servo Cable
      • Push Rod
      • Other Accessories
  • Development Board
    • Official Arduino Boards
      • Original Arduino Boards
      • Official Arduino Shields
      • Official Arduino Kits
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    • 8051 Board
    • Single Board Computer
    • Teensy Board
    • Udoo Board
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    • PIC Development board
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    • Advance Development Boards
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      • Boards
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    • e-Ink Display
    • Seven Segment LED Display
    • LED Dot Matrix Display
  • Sensors
    • Sensor Kits
    • Ultrasonic and Proximity
      • MAXBOTIX Ultrasonic Sonar
      • Ultrasonic Sensor
      • Orange Proximity Sensor
      • Autonics Proximity Sensor
      • Other Proximity Sensor & Modules
      • LiDAR Sensor
      • Other Ultrasonic Sensors
    • Temp., Humidity, Gas & Environmental
      • Temperature & Humidity Sensor
      • Environmental Sensors
      • Gas and Dust Sensor
      • Thermoelectric Cooler
    • Motion, Light and Sound
      • PIR / IR and Optical Sensor
      • RFID Card, Tags & Reader
      • Light/Color Sensor
      • Line Sensor
      • Sound Sensor
    • Biometric, Rotation, and Current
      • Biometric/ECG/EMG Sensor
      • Rotary Encoder
      • Current and Voltage
    • Load, Pressure, Flow & Vibration
      • Water TDS, pH, Flow, Level and Pressure Sensor
      • Vibration/Tilt Sensor and Modules
      • Load / Pressure / Force / Flex Sensor
  • Cameras
    • IoT Cameras
    • FPV Cameras
    • Smart Vision Camera
    • Thermal Cameras
    • Raspberry Pi Camera
  • IoT and Wireless
    • Ai Thinker ESP Modules and Development Boards
    • ESP WiFi Module
    • Development Board/Kit
    • xBee Zigbee Module
    • LORA WiFi
    • Bluetooth and NRF Modules
    • GSM / GPRS Modules
    • Transmitter and Receivers
    • Advance Controller Board
    • Wireless Smart Switches
  • Electronic Modules
    • Programming Module
    • Memory Interfacing
    • Communication Module
    • Bluetooth Interfacing
    • Ethernet Module
    • Interface Module
    • LED Module
    • LASER Module
    • Addressable LED and Drivers
    • Breakout Board
    • Relay Switch Modules
    • Electronic Switches/Keypads
    • Solar Panels and Controllers
    • Wearable Electronic
    • Real Time Module (RTC)
    • Audio Module/ Amplifier
    • Mux-DeMux & Logic Converter
    • Voltage Regulator
      • Boost Converter (Step-Up )
      • Buck Converter (Step-Down)
    • Measuring Instruments
      • Digital Multimeter
      • Temperature Meter
      • Digital Voltage, Current and Frequency Meter
      • Oscilloscope & Signal Generator
      • Other Measuring Instrument
    • Power Supply
      • Transformers
      • SMPS
      • Hi-Link Power Supply Module
    • Displays
  • Wires and Cables
    • PVC and Silicone Wires
      • PVC Wire
      • 6 to 10 AWG
      • 12 to 16 AWG
      • 18 to 22 AWG
      • 24 to 30 AWG
    • Cables
      • DuPont / Jumper Cable
      • Interfacing Cables
      • JR Servo cable
      • Futaba servo cable
      • FFC Cable
    • Heat Shrink Tubing / Sleeve
      • Heat Shrink Combos
      • 1 mm to 4 mm
      • 5 mm to 10 mm
      • 11 mm and Above
      • PVC Heat Shrink
    • Tools and Accessories
      • Wire Cutter / Stripper
      • Cable Ties
      • Sleeves and Drag Chain
  • Mechanical Components and Workbench Tools
    • Mechanical Robotic Parts
      • Chassis
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • Lead Screw
      • Linear Guide Rail
      • Couplings
      • Bearings
      • Motor Mounting Brackets
      • Gears
    • Wheels
      • Mecanum Wheels
      • Omni Wheels
      • Heavy Duty Wheel
      • RC Car Wheel
      • Pulley Wheel & Track Belt
      • Caster Wheels
    • Carbon Fiber
      • Carbon Fiber Sheets and Strips
      • Carbon Fiber Tubes and Rods
    • Nuts-Bolts and Spacers
      • Countersunk(CSK) Screws
      • Socket Set Screws (Allen Grub)
      • Socket Head Cap Screw (Allen Bolt)
      • CHHD Screws
      • Nut and Washers
      • Nylon Nuts and Bolts
      • Spacer and Standoff
    • Soldering Tools
    • Workbench Tools
  • Services
    • PCB Manufacturing Service
    • Custom Battery Pack
    • Online SLA 3D Printing Service
    • Online FDM 3D Printing Service
    • Metal Laser Cutting Service
    • Non-Metal Laser Cutting Service
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      • Diode
      • Transistor
      • Crystal Oscillators
    • Semiconductor ICs
      • Microcontroller ICs
      • Interface ICs
      • Clock, Timer and Counter ICs
      • Sensor ICs
      • Optocoupler ICs
      • Converter ICs
      • Comparator ICs
      • Driver ICs
      • Encoder ICs
      • Audio ICs
      • IC Base
    • LEDs and Indicators
      • LEDs Kit
      • Pilot Lamp Indicator
      • LEDs with Holders
      • Through Hole LED
      • SMD LED
    • Miscellaneous Component
      • Potentiometer
      • Fuse
      • Buzzer/Speaker
      • Aluminium Heat Sink
      • Bread Board and Zero PCB
    • Mechanical Switches
    • Power Connectors
    • RF Connectors
    • Interface Connector
    • Berg / FPC / IDC Connector
  • DIY Learning and Robot Kits
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      • Upto 3 Inch
      • 3 Inch to 7 Inch
      • 8 Inch to 10 Inch
      • 11 Inch and Above
      • Carbon Fiber Propeller
      • Triblades
      • Propeller Accessories
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    • FPV Antennas and Trans-Receivers
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  • E-Bike Parts
    • Ebike Kit
    • Ebike Motor and Controller
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  • 3D Printers and Parts
    • Creality 3D Printers
    • Electronics Parts
      • 3D Printer Display and Controllers
      • 3D Printer Extruder Kit
      • 3D Printer Extruder Parts and Fans
      • Stepper Motors and Accessories
      • 3D Printer Display and Controller
      • Limit Switch
    • Mechnical Parts
      • 3D Printer Heatbed and Accessories
      • 3D Printer Nozzle
      • Lead Screw and Nut
      • Linear Guide Rail
      • Aluminum Extrusion and Accessories
      • Smooth Rods
      • 3D Printer Couplings
      • Timing Belt and Pulley
      • Sleeves and Drag Chain
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      • ORANGE Premium Filaments
      • ESUN Filaments
      • Resins
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    • Custom Battery Pack
    • Lemon Premium Li-PO Battery
      • 2S Lipo (7.4V ~ 8.4V)
      • 3S Lipo (11.1V ~ 12.6V)
      • 4S Lipo (14.8V ~ 16.8V)
      • 6S LiPo (22.2V ~ 25.2V)
    • Orange LiPO Battery
      • 1 Cell (3.7-4.2)V
      • 2 Cell (7.4-8.4)V
      • 3 Cell (11.1-12.6)V
      • 4 Cell (14.8-16.8)V
      • 6 Cell (22.2-25.2)V
    • Micro LiPo Batteries
    • Lithium-Ion Batteries
      • 1 cell (3.7V~4.2V)
      • 2 Cell (7.4V~8.4V)
      • 3 Cell (11.1V~12.6V)
      • 4 Cell (14.8V~16.8V)
      • 5 Cell (18.5V) & Above
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HomeBlogsDevelopment boardsRaspberry PiGPIO, Input & Output GUI panel using Tkinter

GPIO, Input & Output GUI panel using Tkinter

Raspberry Pi  0  comments  4383 Views  Tuesday, March 12, 2019











The article guides you through Designing a Graphical panel to control all the 21 GPIO’s of Raspberry Pi as an Input or Output Pin.

In this tutorial we will be Designing a Graphical panel through which we will be able to control all the 21 GPIO's of Raspberry Pi as an Input or Output Pin. Credits for the program - scotty3785, Original code link - click here Step 1 - Programming the Raspberry Pi
  • Open the python IDLE in Raspberry Pi and create a new Python file and enter the following code.
#This code has been published by Robu.in 
#visit https://robu.in for more information

import sys

if(sys.version_info[0]<3):
  from Tkinter import *
else:
  from tkinter import *

import RPi.GPIO as pi
import math
#import tkSimpleDialog

class LED(Frame):
"""A Tkinter LED Widget.
a = LED(root,10)
a.set(True)
current_state = a.get()"""
OFF_STATE = 0
ON_STATE = 1

   def __init__(self,master,size=10,**kw):
      self.size = size
      Frame.__init__(self,master,width=size,height=size)
      self.configure(**kw)
      self.state = LED.OFF_STATE
      self.c = Canvas(self,width=self['width'],height=self['height'])
      self.c.grid()
      self.led = self._drawcircle((self.size/2)+1,(self.size/2)+1,(self.size-1)/2)
   def _drawcircle(self,x,y,rad):
       """Draws the circle initially"""
       color="red"
       return self.c.create_oval(x-rad,y-rad,x+rad,y+rad,width=rad/5,fill=color,outline='black')
   def _change_color(self):
       """Updates the LED colour"""
       if self.state == LED.ON_STATE:
          color="green"
       else:
          color="red"
       self.c.itemconfig(self.led, fill=color)
   def set(self,state):
       """Set the state of the LED to be True or False"""
       self.state = state
       self._change_color()
   def get(self):
       """Returns the current state of the LED"""
       return self.state

## Future Functionality
##class gpioEdit(tkSimpleDialog.Dialog):
## """Dialog to be expanded to support advanced gpio features like
## - Pull Up / Pull Down Resistor Config
## - Debounce"""
## def __init__(self, master,gpio):
## top = self.top = Toplevel(master)
## if gpio.isInput():
## title = "Edit Input: %s" %(str(gpio.name))
## else:
## title = "Edit Output: %s" %(str(gpio.name))
## l = Label(top,text=title)
## b = Button(top, text="Submit", command=self.submit)
##
## l.grid(row=0)
## b.grid(row=1)
##
## def submit(self):
## print("Submitted")
## self.top.destroy()

class GPIO(Frame):
   """Each GPIO class draws a Tkinter frame containing:
   - A Label to show the GPIO Port Name
   - A data direction spin box to select pin as input or output
   - A checkbox to set an output pin on or off
   - An LED widget to show the pin's current state
   - A Label to indicate the GPIOs current function"""
   gpio_modes = ("Passive","Input","Output")

   def __init__(self,parent,pin=0,name=None,**kw):
      self.pin = pin
      if name == None:
         self.name = "GPIO %02d" % (self.pin)
         Frame.__init__(self,parent,width=150,height=20,relief=SUNKEN,bd=1,padx=5,pady=5)
         ##Future capability
         ##self.bind('<Double-Button-1>', lambda e, s=self: self._configurePin(e.y))
         self.parent = parent
         self.configure(**kw)
         self.state = False
         self.cmdState = IntVar()
         self.Label = Label(self,text=self.name)
         self.mode_sel = Spinbox(self,values=self.gpio_modes,wrap=True,command=self.setMode)
         self.set_state = Checkbutton(self,text="High/Low",variable=self.cmdState,command=self.toggleCmdState)
         self.led = LED(self,20)
         self.Label.grid(column=0,row=0)
         self.mode_sel.grid(column=1,row=0)
         self.set_state.grid(column=2,row=0)
         self.current_mode = StringVar()
         self.led.grid(column=3,row=0)

         self.set_state.config(state=DISABLED)
         function = self.getPinFunctionName()
         if function not in ['Input','Output']:
            self.mode_sel.delete(0,'end')
            self.mode_sel.insert(0,function)
            self.mode_sel['state'] = DISABLED

## def _configurePin(self, y):
## """Future capability to setup pull up/down"""
## new = gpioEdit(self.parent,self)

    def isInput(self):
       """Returns True if the current pin is an input"""
       return (self.mode_sel.get() == "Input")

    def setMode(self):
        """Sets the GPIO port to be either an input or output
       Depending on the value in the spinbox"""
       if (self.mode_sel.get() == "Input"):
          self.set_state.config(state=DISABLED)
          pi.setup(self.pin,pi.IN)
       elif (self.mode_sel.get() == "Passive"):
          self.set_state.config(state=DISABLED)
          pi.cleanup(self.pin)
       else:
          self.set_state.config(state=NORMAL)
          pi.setup(self.pin,pi.OUT)
          self.updateInput()

    def getPinFunctionName(self):
        pin = self.pin
        functions = {pi.IN:'Input',
                     pi.OUT:'Output',
                     pi.I2C:'I2C',
                     pi.SPI:'SPI',
                     pi.HARD_PWM:'HARD_PWM',
                     pi.SERIAL:'Serial',
                     pi.UNKNOWN:'Unknown'} 
        return functions[pi.gpio_function(pin)]

## Future Functionality
## def setPullUp(self,pullup):
## """Defines the GPIO as having a pull up resistor so the input
## state is inverted when read
## setPullUp(True) - Pin is pulled up
## setPullUP(False) - Pin is not pulled up"""
## self.pullup = pullup

   def toggleCmdState(self):
      """Reads the current state of the checkbox, updates LED widget
      and sets the gpio port state."""
      self.state = self.cmdState.get()
      self.updateLED()
      self.updatePin()

   def updatePin(self):
      """Sets the GPIO port state to the current state"""
      pi.output(self.pin,self.state)

   def updateLED(self):
      """Refreshes the LED widget depending on the current state"""
      self.led.set(self.state)

   def updateInput(self):
      """Updates the current state if the pin is an input and sets the LED"""
      if self.isInput():
         state = pi.input(self.pin)
         self.state = state
         self.updateLED()

class App(Frame):
   def __init__(self,parent=None, **kw):
      Frame.__init__(self,parent,**kw)
      self.parent = parent
      pi.setmode(pi.BCM)
      self.ports = []
     ## Get the RPI Hardware dependant list of GPIO
     gpio = self.getRPIVersionGPIO()
     for num,(p,r,c) in enumerate(gpio):
         self.ports.append(GPIO(self,pin=p))
         self.ports[-1].grid(row=r,column=c)
         self.update()

   def onClose(self):
       """This is used to run the Rpi.GPIO cleanup() method to return pins to be an input
       and then destory the app and its parent."""
       try:
           pi.cleanup()
       except RuntimeWarning as e:
           print(e)
           self.destroy()
           self.parent.destroy()

    def readStates(self):
        """Cycles through the assigned ports and updates them based on the GPIO input"""
        for port in self.ports:
            port.updateInput()

    def update(self):
        """Runs every 100ms to update the state of the GPIO inputs"""
        self.readStates()
        self._timer = self.after(100,self.update)
   def getRPIVersionGPIO(self):
       """Returns the GPIO hardware config for different Pi versions
       Currently supports layout 1 and 3"""
       gpio1 = ((0,0,0),
                (1,1,0),
                (4,2,0),
                (17,3,0),
                (21,4,0),
                (22,5,0),
                (10,6,0),
                (9,7,0),
                (11,8,0),
                (14,0,1),
                (15,1,1),
                (18,2,1),
                (23,3,1),
                (24,4,1),
                (25,5,1),
                (8,6,1),
                (7,7,1))
       gpio2 = ((2,0,0),
                (3,1,0),
                (4,2,0),
                (17,3,0),
                (27,4,0),
                (22,5,0),
                (10,6,0),
                (9,7,0),
                (11,8,0),
                (14,0,1),
                (15,1,1),
                (18,2,1),
                (23,3,1),
                (24,4,1),
                (25,5,1),
                (8,6,1),
                (7,7,1))
       gpio3 = ((2,0,0),
                (3,1,0),
                (4,2,0),
                (17,3,0),
                (27,4,0),
                (22,5,0),
                (10,6,0),
                (9,7,0),
                (11,8,0),
                (5,9,0),
                (6,10,0),
                (13,11,0),
                (19,12,0),
                (26,13,0),
                (14,0,1), 
                (15,1,1),
                (18,2,1),
                (23,3,1),
                (24,4,1),
                (25,5,1),
                (8,6,1),
                (7,7,1),
                (12,8,1),
                (16,9,1),
                (20,10,1),
                (21,11,1))
   if pi.RPI_REVISION == 3:
      gpio = gpio3
      self.parent.title('Raspberry Pi GPIO - A+/B+/2B+')
   elif pi.RPI_REVISION == 2:
        #Change this when I know the pins on RPi GPIO Version 2
        gpio = gpio2
        self.parent.title('Raspberry Pi GPIO - A/B Rev2')
   elif pi.RPI_REVISION == 1:
        self.parent.title('Raspberry Pi GPIO - A/B')
        gpio = gpio1
   else:
        self.parent.title('Raspberry Pi GPIO - Unknown Version')
        ##Assume same config as A+/B+/2B+
        gpio = gpio3
        return gpio

def main():
    root = Tk()
    root.title("Raspberry Pi GPIO")
    a = App(root)
    a.grid()
    """When the window is closed, run the onClose function."""
    root.protocol("WM_DELETE_WINDOW",a.onClose)
    root.resizable(False,False)
   root.mainloop()

if __name__ == '__main__':
   main()
  • Now save the program. We are saving it as gpio.py python file.

Step 2 - Running the program and Understanding the GUI panel
  • Now open terminal and type command sudo python gpio.py to run the program.
  • A panel window will open up like this -
  • From here you can set the status of any GPIO pin from the Corresponding drop down menu as Passive, Input or Output.
  • If you have selected Output, then you will have to mark or unmark the corresponding High/Low box to make the Pin Low or High
  • If you have selected Input, then the low Input will show the the Red colour and if input is high, it will show  Green Colour.
Now you can Explore the more of a GUI with Tkinter. For more on tkinter you can visit - https://wiki.python.org/moin/TkInter

Tags : Raspberry Pi Article

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