Ec Tds modbus connection and configuration with s2100 data logger

I have a problem with my ec tds sensor. I tried to connect it to data logger based in the connection specified on datasheet.
Can someone help me do the configuration on the sensecap mate app. Thank you

what is your sensor

Ec tds sensor connected to s2100 data logger.
I have successfully configured the sensor with s2100 but another problem comes in. When i try to calibrate the sensor by pressing the sw-1 button, there is no indicator that i am on calibration mode. The led on the side of the buttons won’t blink.

what is the sensor? i think there would need to be some logic in place to perfrom the calibration in software

When I try to calibrate using the sw-1 button. There is no led indicator blinking beside these buttons

I assume you have read this

Yes especially on this part of the calibration.