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.

What does the Renke RS-WS-N01-TR not measure?

The Renke RS-WS-N01-TR reports moisture and temperature only — it does not report EC, pH, N-P-K, salinity and TDS. On the same RS-485 bus, add EC: Renke RS-ECTHPH-N01-TR-1; pH: Renke RS-ECTHPH-N01-TR-1; N-P-K: JXBS-3001-NPK-RS.

Is the Renke RS-WS-N01-TR the same as the ZTS-3000-TR-WS-N01?

They are register-compatible, not identical products. Both expose the same parameter set and the same Modbus register map, and Sankhya reads both with the ZTS_2in1 firmware profile. The ZTS-3000-TR-WS-N01 is specified at DC 5–30 V against DC 4.5–30 V here. Housing, cable gland and probe material can differ between vendors, so check the electrical specs above before substituting one for the other.

Home / Sensors / Renke RS-WS-N01-TR

Renke · RS-485 sensor

Shandong Renke Control Technology

Renke RS-WS-N01-TR

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

✓ Verified for SankhyaMoistureTemperatureVerification 0.95 · datasheet-confirmed

At a glance

The Renke RS-WS-N01-TR is a 2-in-1 RS-485 soil probe reporting moisture and temperature over Modbus-RTU on RS-485 at 4800 bps, 8N1, on DC 4.5–30 V. This guide documents 2 registers, default Modbus address 1. It does not report EC, pH, N-P-K and others. For those on the same bus: EC → Renke RS-ECTHPH-N01-TR-1; pH → Renke RS-ECTHPH-N01-TR-1. It is register-compatible with the ZTS-3000-TR-WS-N01, which the same firmware profile reads unchanged. Sankhya firmware profile: ZTS_2in1.

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.
What does the Renke RS-WS-N01-TR not measure?: The Renke RS-WS-N01-TR reports moisture and temperature only — it does not report EC, pH, N-P-K, salinity and TDS. On the same RS-485 bus, add EC: Renke RS-ECTHPH-N01-TR-1; pH: Renke RS-ECTHPH-N01-TR-1; N-P-K: JXBS-3001-NPK-RS.
Is the Renke RS-WS-N01-TR the same as the ZTS-3000-TR-WS-N01?: They are register-compatible, not identical products. Both expose the same parameter set and the same Modbus register map, and Sankhya reads both with the ZTS_2in1 firmware profile. The ZTS-3000-TR-WS-N01 is specified at DC 5–30 V against DC 4.5–30 V here. Housing, cable gland and probe material can differ between vendors, so check the electrical specs above before substituting one for the other.

Alternatives

How this differs from similar models

How the Renke RS-WS-N01-TR compares with the other RS-485 models in the Sankhya library. "Drop-in" means the same parameter set and the same register map, read by the same firmware profile.

Model	Relationship	Measures	Baud	Difference
ZTS-3000-TR-WS-N01	Drop-in	Moisture, Temperature	4800	Same parameter set and register map. Differs in supply range (DC 5–30 V) and registers documented here (4).
Renke RS-ECTHPH-N01-TR-1	Sibling	Moisture, Temperature, EC, pH, Salinity, TDS	4800	Adds EC, pH, salinity and TDS.
Renke RS-SD-N01-TR-1	Sibling	Moisture	9600	Drops temperature. Default baud 9600.

Same family

Related Renke sensors

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.