Rs485 cwt soil sensor support

[marjankow]

I'm using
ESP32-WROOM-32U with RS485 to TTL module

THCPH-S (5pin probe) manual_V1.4.pdf

Any idea or help how to guess "ModbusSend" request to the device?

[sfromis]

You should not need to "guess", but instead read the PDF document you linked, to find out what it supports.

[marjankow]

Well was trying but any response from sensor, I wander if we get any tasmota console logs from 'RS485 to TTL' module (also nothing). Or you suggesting it's not supported?

[sfromis]

I'm only suggesting that Tasmota has support for Modbus, if you make sure to have all details of hardware, wiring and config exactly right. IIRC, that includes the need to use a RS485 adapter able to automatically manage direction, which is not all of those.

[Noschvie]

Example of a supported one:
https://www.aliexpress.com/item/1005001621746811.html

[mohammednidal1988]

Hi, Im trying to connect the same exact one but still no luck, did you get it working?

[marjankow]

Not succeeded. My sensor is working with the screen kit. But with rs486 to ttl and esp32 not. I was wondering how to see if rs486 to ttl integrated with my esp32 board (without sensor connected) works can we retrieve any logs.