Sensor not giving me a reading

I am using a Raspberry Pi 4 with a CO2 Sensor from atlas scientific after installing and patching up of the circuit it dosent seem to be giving me a reading does anyone have a clue? i edited the sample code a lil to give me feedback when i ping a command to the raspberry pi or sensor board

The model of the sensors is : EZO CO2

this is the code in python

#!/usr/bin/python import serial import sys import time from serial import SerialException def read_line(): """ Taken from the ftdi library and modified to use the EZO line separator "\r". """ lsl = len(b'\r') line_buffer = [] while True: next_char = ser.read(1) if next_char == b'': break line_buffer.append(next_char) if (len(line_buffer) >= lsl and line_buffer[-lsl:] == [b'\r']): break return b''.join(line_buffer) def read_lines(): """ Also taken from ftdi library to work with modified readline function. """ lines = [] try: while True: line = read_line() if not line: break ser.flush_input() lines.append(line) return lines except SerialException as e: print("Error, ", e) return None def send_cmd(cmd): """ Send command to the Atlas Sensor. Before sending, add Carriage Return at the end of the command. :param cmd: :return: """ print("Sending command:", cmd) # Debug statement to show the command being sent buf = cmd + "\r" # Add carriage return try: ser.write(buf.encode('utf-8')) return True except SerialException as e: print("Error, ", e) return None if __name__ == "__main__": real_raw_input = vars(__builtins__).get('raw_input', input) # Compatibility for Python 2/3 print("\nWelcome to the Atlas Scientific Raspberry Pi UART example.\n") print(" Any commands entered are passed to the board via UART except:") print(" Poll,xx.x command continuously polls the board every xx.x seconds") print(" Pressing ctrl-c will stop the polling\n") print(" Press enter to receive all data in buffer (for continuous mode) \n") # To get a list of ports, use the command: # python -m serial.tools.list_ports # in the terminal usbport = '/dev/tty1' # Change to match your Pi's setup print("Opening serial port now...") try: ser = serial.Serial(usbport, 9600, timeout=0) except serial.SerialException as e: print("Error, ", e) sys.exit(0) while True: input_val = real_raw_input("Enter command: ") # Continuous polling command automatically polls the board if input_val.upper().startswith("POLL"): delaytime = float(input_val.split(',')[1]) send_cmd("C,0") # Turn off continuous mode # Clear all previous data time.sleep(1) ser.flush() # Get the information of the board you're polling print("Polling sensor every %0.2f seconds, press ctrl-c to stop polling" % delaytime) try: while True: send_cmd("R") lines = read_lines() for i in range(len(lines)): if lines[i][0] != b'*'[0]: print("Response: " + lines[i].decode('utf-8')) time.sleep(delaytime) except KeyboardInterrupt: # Catches the ctrl-c command, which breaks the loop above print("Continuous polling stopped") # If not a special keyword, pass commands straight to board else: if len(input_val) == 0: lines = read_lines() for i in range(len(lines)): print(lines[i].decode('utf-8')) else: send_cmd(input_val) time.sleep(1.3) lines = read_lines() for i in range(len(lines)): print(lines[i].decode('utf-8'))

libraries can be downloaded here under documents and downloads https://atlas-scientific.com/probes/co2-sensor/