Serial cmd monitor not recognizing input

Using Arduino Installation & Troubleshooting
#1

I have a Gravity Analog Electrical Conductivity Sensor ESEN292 V2.0.

To enter the calibration mode you need to enter "enterec" in the serial cmd window.

On my older laptop, this works no problem. I enter "enterec" and I am able to calibrate the sensor.

However, on my new laptop, I can not get the serial monitor to recognize the command.

The code, .h and .cpp files are exactly the same on both computers.

I have even copied the code files from my New laptop to my old one to ensure the cmd still operated correctly. "it did"

I then downgraded my new computer IDE software from 8.12 to 8.11 to match my old computer but the cmd still is not recognized.

Is there something I am missing? maybe a setting or COM issue? IDk....

Direction would be greatly appreciated.

#2

Is the option list (bottom right in the serial monitor) to set CR, LF, both or none, in the correct position?

#3

This was it thank you!

I had changed it about two months ago to no line ending for some counting exercise, I forget what.

#4