Holonomic Robotic Platform

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Engineering Project Data

Mechanical

Drive Motors with Gearboxes

Hardware Case for Raspberry PI 4

Electronic/Electrical

Raspberry PI4 4 Gig Ram

Raspberry PI Full Function Servo Motor HAT Controller

HDMI Video Adapter Cable

Micro SD 64 Gig Memory Card for PI Operating System, and Hard Drive

Software

Raspbian Operating System

Balena Flash Prom Programmer

Windows Python for Laptop Host Development

Winpython Logo

Spyder Development Environment

Spyder IDE

Spyder is a powerful scientific environment written in Python, for Python, and designed by and for scientists, engineers and data analysts, featuring the following options:

  • Editor
  • IPython Console
  • Variable Explorer
  • Profiler
  • Debugger
  • Help

Code and Mathematics

Code to Facilitate Development

To help easy development of specific modules in the Holonomic Robot, a communications interface is implemented between the Robot(Raspberry PI 4 Server) and a Laptop Development workstation(HP Client). The protocol is built on TCP Tx-Rx Exchange between the two devices. The code modules are Python running at both ends. The Robot starts out as a purely slaved device taking commands from the laptop. Motor control modules manipulating the GPIO interface run on the Robot but are commanded by the laptop. As the motor control is refined and routinized along with the growth of intrinsic autonomy, the code is transitioned from the Laptop to the Robot. Code is primarily developed in Python 3.7.

Laptop Code for Robot/Laptop Base Communication

import socket
message_from_server = ''
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
client.connect(('192.168.1.43', 13000))
while True:
    message = ''
    message = input('Input lowercase sentence:')
    client.send(message.encode())
    message_from_server = (client.recv(4096)).decode()
    print (message_from_server)
    if message == "Stop the Server" : break 
client.close()
print ("You ended the session")

Robot Code for Robot/Laptop Base Communication