[Python] Trying to connect to a UART CO2 sensor to to get readings using a python script but I...

I'm using this specific CO2 sensor:

https://www.co2meter.com/products/sprintir6s-100-co2-smart-sensor?variant=43960919195846

for a school project and ultimately I'm trying get it connected to a Raspberry Pi for research purposes.

I'm trying to use a Python script to communicate with the device connected to my PC via USB currently as the device came with a USB cable that a connects to the proper leads on the board ("PWR", "GND","RX", "TX", as printed on the PCB).

The manual for the device listed here:

https://www.gassensing.co.uk/wp-content/uploads/2023/05/SprintIR-R-Data-Sheet-Rev-4.12_3.pdf

(PAGE 18) states the devices communicates using ASCII and to be honest I'm feeling a little 'in over my head'. So perhaps I should start with the python code:

import serial
import time

try:
COM_PORT='COM3'
ser = serial.Serial(COM_PORT, 38400, timeout=1)
print("Serial port connected")
time.sleep(2) # Wait for the connection to establish

command = 'K 1\r\n'
ser.write(command.encode('ascii'))
time.sleep(2) # Wait for the response

response = ser.read_all().decode('ascii')
print("Response:", response)

except serial.SerialException as e:
print(f"Error: {e}")

finally:
if ser.is_open:
ser.close()
print("Serial port closed")


The code seems to run fine but I'm not getting any response, which looks like this

Serial Port connected
Response:
Serial Port closed


Any help would be appreciated. Thanks!

Continue reading...