Python code for Stepper Gauge

power_gauge_stepper.py

import socket
import sys
import json
import RPi.GPIO as GPIO
import socket
import time

step_pin = 12
direction_pin = 16   
current_position = 0 
 
def Main():
        host = '192.168.1.104'
        port = 50008
        
        GPIO.setmode(GPIO.BCM)         
        GPIO.setup(step_pin, GPIO.OUT)
        GPIO.setup(direction_pin, GPIO.OUT)
         
        while(1):
            try:
                mySocket = socket.socket()
                mySocket.connect((host,port))                 
                message = "get_powers"                            
                mySocket.send(message.encode())
                data = mySocket.recv(1024).decode()                         
                print ('Received from server: ' + data)               
                mySocket.close()
            
            except:
                raise
            
            try:
                thepowers = json.loads(data)
                new_position = int(thepowers['totalwatts'])
                MoveMotorAbs(new_position, 1)
            except:
                raise            
            time.sleep(2)

def MoveMotorAbs(new_position, speed=100):
    global current_position
    
    moveto = new_position - current_position
    current_position = new_position     
    print("moving to  {}".format(moveto))
    if(moveto > 0):
        GPIO.output(direction_pin, GPIO.LOW)
        print("forward")
    else:
        GPIO.output(direction_pin, GPIO.HIGH)
        print("reverse")       
    for i in range(0, abs(moveto)):
        GPIO.output(step_pin, GPIO.HIGH)
        time.sleep(speed*0.001)
        GPIO.output(step_pin, GPIO.LOW)
        time.sleep(speed*0.001)
    
    current_position = new_position    
            
if __name__ == "__main__":
    Main()