#Set voltage and current, and control output ON/OFF
import serial
import time
class PowerSupplyController:
 def __init__(self, port , baudrate=9600, timeout=1):
 self.port = port
 self.baudrate = baudrate
 self.timeout = timeout
 self.serial_conn = None
 def open_connection(self):
 """Open the serial port"""
 self.serial_conn = serial.Serial(port=self.port, baudrate=self.baudrate, timeout=self.timeout)
 print(f"Connected to {self.port} at {self.baudrate} baudrate.")
 def close_connection(self):
 """Close the serial port"""
 if self.serial_conn and self.serial_conn.is_open:
 self.serial_conn.close()
 print("Connection closed.")
 def send_command(self, command):
 """Send a command"""
 if self.serial_conn and self.serial_conn.is_open:
 self.serial_conn.write(command.encode("utf-8"))
 time.sleep(0.1) # Wait briefly for command processing
 response = self.serial_conn.readline().decode().strip()
 print(f"Response: {response}")
 return response
 else:
 print("Connection is not open.")
 return None
 def status(self):
 """Check the power status"""
 command = "#1 STS\r\n" #Change the unit number according to the settings.
 self.send_command(command)
 print(f"Command{command}")
 def set_remote(self):
 """Set to remote mode"""
 command = "#1 REN\r\n" # Set to remote mode
 self.send_command(command)
 def set_local(self):
 """Set to local mode"""
 command = "#1 GTL\r\n" # Set to local mode
 self.send_command(command)
 def set_voltage(self, voltage):
 """Set voltage"""
 command = f"#1 VSET {voltage:.2f}\r\n" #Voltage setting command
 self.send_command(command)
 def set_current(self, current):
 """Set current"""
 command = f"#1 ISET {current:.2f}\r\n" #Current setting command
 self.send_command(command)
 def power_on(self):
 """Turn power ON"""
 command = "#1 SW1\r\n"
 self.send_command(command)
 def power_off(self):
 """Turn power OFF"""
 command = "#1 SW0\r\n"
 self.send_command(command)
# Main program
if __name__ == "__main__":
 # Serial port settings (Change the port name according to the environment)
 port_name = "COM3" # For Windows
 # port_name = "/dev/ttyUSB0" # For Linux/Mac
 # Create an instance and open the port
 power_controller = PowerSupplyController(port=port_name)
 power_controller.open_connection()
 # Set to remote mode
 power_controller.set_remote()
 # Set voltage and current
 power_controller.set_voltage(5.0) # Set to 5V
 power_controller.set_current(1.0) # Set to 1A
 # Turn power ON
 power_controller.power_on()
 time.sleep(5) # Keep ON state for 5 seconds
 # Turn power OFF
 power_controller.power_off()
 # Set to local mode
 power_controller.set_local()
 # Close the connection
 power_controller.close_connection()