What baud rate does the Renke RS-WS-N01-TR use by default?

4800 bps, 8N1. It is a Modbus-RTU slave; default address 1.

What supply voltage does the Renke RS-WS-N01-TR need?

DC 4.5–30 V (≤ 0.5 W (typical)).

How do I change the Renke RS-WS-N01-TR Modbus address?

Write the device-address register with function code 0x06, one device on the bus at a time, then power-cycle. See the Configuration section above.

Is the Renke RS-WS-N01-TR compatible with the Sankhya platform?

Yes — it is in the Sankhya RS-485 sensor library and the firmware-generation pipeline can produce node firmware for it.

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Renke · RS-485 sensor

Shandong Renke Control Technology

Renke RS-WS-N01-TR

Name: Renke RS-WS-N01-TR
Brand: Shandong Renke Control Technology

Renke 2-in-1 moisture + temperature probe (ZTS-compatible registers).

✓ Verified for SankhyaMoistureTemperatureVerification 0.95 · datasheet-confirmed

Quick reference

Bus & electrical specs

Protocol

Modbus-RTU over RS-485

Default baud

4800 bps

Serial format

8N1

Function codes

0x03

Supply voltage

DC 4.5–30 V

Power

≤ 0.5 W (typical)

Default address

Ingress / housing

IP68

Probe / element

Stainless steel

Operating temp.

−40 to +80 °C (probe)

Firmware profile

ZTS_2in1

Specs sourced from: Official Renke RS-WS-N01-TR Type-485 manual.

Modbus-RTU register map

Function codes 0x03 at 4800 bps, 8N1. Data registers are read with 0x03; configuration registers are written with 0x06. PLC column shows the 4xxxx Modbus holding-register convention.

Register	PLC	Parameter	Type	Scale	Unit	R/W	Notes
0000H	40001	Soil moisture	uint16	0.1	%RH	RO	v4 CORRECTION: 0000H=moisture (not temperature as stated in v3). Confirmed by cross-referencing ZTS-3000-TR-WS official PDF hex response example which uses identical frame format and confirms 0000H=moisture.
0001H	40002	Soil temperature	int16	0.1	°C	RO	0001H=temperature. Negative in two's complement. Range -40 to 80°C.

Example poll

Worked query

# Read moisture + temperature (2 registers from 0x0000) request 01 03 00 00 00 02 C4 0B response 01 03 04 02 92 FF 9B 5A 3D # 0292H=658 => moisture=65.8%, FF9BH=-101 => temperature=-10.1°C

Field notes

Notes & caveats

v4 CORRECTION: Register order in v3 was WRONG. v3 incorrectly stated 0000H=temperature based on misreading prose in the Digikey PDF. The actual hex response example in the same PDF shows 0292H at register0 (=65.8% moisture) and FF9BH at register1 (=-10.1°C temperature) — same order as ZTS family. This sensor now shares ZTS_2in1 firmware profile. Separate RENKE_WS_2in1 profile from v3 is retired.

FAQ

Common questions

What baud rate does the Renke RS-WS-N01-TR use by default?: 4800 bps, 8N1. It is a Modbus-RTU slave; default address 1.
What supply voltage does the Renke RS-WS-N01-TR need?: DC 4.5–30 V (≤ 0.5 W (typical)).
How do I change the Renke RS-WS-N01-TR Modbus address?: Write the device-address register with function code 0x06, one device on the bus at a time, then power-cycle. See the Configuration section above.
Is the Renke RS-WS-N01-TR compatible with the Sankhya platform?: Yes — it is in the Sankhya RS-485 sensor library and the firmware-generation pipeline can produce node firmware for it.

Same family

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Run this sensor on a Sankhya node

Every sensor on this page is in our RS-485 library. Pick your model, and the firmware-generation pipeline builds the Modbus (or ASCII) polling code for an ESP32-S3 node — no hand-coding the register math.

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