Comprehensive Product Summary – STH‑M02ZB ZigBee Temperature and Humidity Sensor

---

### 1. Product Overview

Product Name: ZigBee Temperature and Humidity Sensor
Model: STH‑M02ZB
Series: STH‑M Series (ZigBee Wireless Environmental Sensors)
Article Number: STH‑M02ZB
Manufacturer: Nietzsche Enterprise Co., Ltd.
Manufacturer Website: [www.nhr.com.tw](http://www.nhr.com.tw)
Contact Email: service@nhr.com.tw
Firmware Version (User Manual Reference): Ver. 1.03

The STH‑M02ZB is a high‑accuracy digital temperature and humidity sensor designed for wireless environmental monitoring and control applications. It utilizes ZigBee IEEE 802.15.4 wireless communication technology and conforms to the ZigBee Home Automation (HA) Profile, ensuring interoperability with other ZigBee‑certified devices. Developed by Nietzsche Enterprise, the STH‑M02ZB combines industrial‑grade sensing performance with flexible network integration, making it suitable for both residential and commercial environments.

---

### 2. Key Features

- High‑Accuracy MEMS Sensor Element:
Integrated MEMS‑based temperature and humidity sensing element provides precise environmental readings with ±0.5 °C temperature accuracy and ±5 % relative humidity accuracy.

- Wireless ZigBee Connectivity:
Fully compliant with IEEE 802.15.4 ZigBee 2007/PRO standards and ZigBee HA Profile, enabling seamless integration with ZigBee coordinators, routers, and gateways.

- Extended Transmission Range:
Built‑in power amplifier extends wireless coverage up to 200 m (656 ft) in free‑space conditions, exceeding the range of earlier models such as the STH‑03ZB.

- Routing Capability:
Functions as a ZigBee router, allowing it to relay data from other sensor nodes, thereby improving overall network reliability and mesh coverage.

- Multiple Power Supply Options:
Operates from DC 5 V via Micro‑USB, USB 5 V, or external power adapter, providing installation flexibility in various environments.

- OTA Calibration Support:
Temperature and humidity calibration can be performed over‑the‑air (OTA) using Nietzsche’s QuickView software, simplifying maintenance and ensuring long‑term accuracy.

- Compact and Elegant Design:
Slim profile (approx. 85 × 47 × 10 mm) allows unobtrusive installation in offices, laboratories, clean rooms, and commercial buildings.

- High Communication Reliability:
Proven 99.999 % communication success rate in field tests with Modbus RTU wired sensors (150 ms timeout), demonstrating robust wireless performance.

- Flexible Network Topologies:
Supports Star, Tree, and Mesh network configurations for scalable deployment.

- LED Status Indicators:
Dual LED system (blue and red) provides clear visual feedback for network status, joining, removal, and operational states.

---

### 3. Technical Specifications

| Parameter | Specification |
|----------------|------------------|
| Sensing Type | Combined temperature and humidity |
| Measurement Range | Ambient environment |
| Temperature Accuracy | ±0.5 °C |
| Humidity Accuracy | ±5 % RH |
| Wireless Protocol | IEEE 802.15.4 ZigBee 2007/PRO, ZigBee HA Profile |
| Transmission Range | Up to 200 m (656 ft) free space |
| Operating Frequency | 2.4 GHz ISM band |
| RF Output Power | 0 dBm (1 mW) |
| Receiver Sensitivity | −92 dBm |
| Power Supply | DC 5 V via Micro‑USB or USB adapter |
| Power Consumption | Approx. 150 mW (TX ≈ 35 mA) |
| Transmit Interval | Configurable 1 s – 75 min (via DIP switches) |
| Network Topology | Star / Tree / Mesh |
| Operating Temperature | −20 °C to +80 °C (−4 °F to +176 °F) |
| Operating Humidity | 0 – 95 % RH (non‑condensing) |
| Dimensions | 85 (L) × 47 (W) × 10 (H) mm |
| Weight | 19.8 g (sensor only); 97.2 g (with cable); 201 g (packaged) |
| Supported OS | Windows 95/98/NT/2000/XP/7/8 |
| Certifications | CE / FCC |
| Addressing Method | DIP switch configuration |
| Communication Protocols | UART (Modbus RTU) / ZigBee HA |
| Enclosure Material | High‑impact ABS plastic |
| Color | White / neutral tone |
| Mounting Options | Wall‑mount cradle or built‑in hanging fixture |

---

### 4. Functionality

The STH‑M02ZB operates as a wireless environmental sensor node within a ZigBee network. It continuously measures ambient temperature and humidity using its integrated MEMS sensor and transmits data at user‑defined intervals to a ZigBee coordinator, router, or gateway.

Operation Workflow:
1. Power On: Device is powered via 5 V DC USB adapter.
2. Network Joining: The sensor searches for a parent device (coordinator or router) and joins the ZigBee network when permitted.
3. Data Transmission: Periodic sensor readings are sent wirelessly according to the configured transmission interval.
4. Routing Function: When configured as a router, the STH‑M02ZB can relay data from other ZigBee nodes, extending network coverage.
5. Calibration & Configuration: OTA calibration and configuration are performed through QuickView software.

Typical Applications:
- Building automation and HVAC control
- Laboratory and clean‑room environmental monitoring
- Agricultural and greenhouse climate control
- Commercial and office environmental management
- Integration with Modbus RTU or ZigBee‑based data acquisition systems

Compatibility:
- Works with ZigBee HA‑certified coordinators and routers such as WZB‑01USBC, WZB‑02485C, WZB‑05ET, WZB‑06GP, and WZB‑02485R.
- Compatible with Nietzsche’s QuickView and Data PS software for data visualization and configuration.

---

### 5. Components & Accessories

Standard Package Contents:
- 1 × STH‑M02ZB ZigBee Temperature & Humidity Sensor
- 1 × Mounting cradle
- 2 × Wall plugs
- 2 × Mounting screws
- 1 × DC 5 V USB adapter and Micro‑USB cable
- User manual

Optional Accessories and Related Devices:
| Device Type | Model | Description |
|-----------------|------------|-----------------|
| Router | WZB‑02485R / WZB‑01USBR | ZigBee wireless routers for range extension |
| Coordinator | WZB‑01USBC / WZB‑02485C | ZigBee wireless coordinators |
| Gateway | WZB‑05ET | ZigBee‑to‑Ethernet coordinator (RJ‑45 static IP) |
| Multi‑Gateway | WZB‑06GP | ZigBee multi‑gateway for network integration |
| Software | QuickView / Data PS | Configuration, calibration, and data logging tools |

---

### 6. Installation & Setup

Requirements:
- Mounting fixtures (included)
- Drill with 5 mm (0.2 in) bit for wall plugs or 3.5 mm (0.14 in) bit without plugs
- Size 1 Phillips screwdriver
- Nearby AC mains socket (within 1 m)

Installation Methods:
1. Using Mounting Cradle:
- Pre‑drill holes using the cradle as a template.
- Insert wall plugs if required and fasten screws.
- Snap the sensor into the cradle.
2. Using Built‑in Hanging Fixture:
- Drill a single hole and insert a wall plug.
- Leave screw protruding ≈ 2 mm (0.08 in).
- Hang the sensor securely on the screw.

Placement Guidelines:
- Maintain at least 15 cm (6 in) clearance on all sides.
- Avoid direct sunlight, vents, fans, heaters, or steam sources.

Powering On:
- Connect the Micro‑USB plug to the sensor and the USB adapter to mains power.
- Observe LED indicators for operational status.

LED Status Indicators:
| LED Pattern | Meaning |
|-----------------|-------------|
| Blue – 1 flash / 5 s | Ready to join a parent device |
| Blue – 3 flashes (once) | Successfully joined |
| Blue – 1 flash / 2 s | Normal operation |
| Blue – 2 flashes / 3 s | Permit‑join mode active |
| Blue – 2 flashes / 5 s | Disconnected from parent |
| Red – 2 flashes | Device joined to network |
| Red – 3 flashes | Device removed |
| Red – rapid flashing | Removing from network |
| Blue + Red ON | ZigBee reset in progress |

Network Joining Procedure:
1. Power on the parent device (coordinator/router).
2. Power on STH‑M02ZB (blue LED = 1 flash / 5 s).
3. Enable “permit join” on the parent device.
4. Upon successful join, blue LED flashes 3 times then 1 flash / 2 s.

Removing from Network:
- Press the link switch 3 times quickly; red LED flashes rapidly until removal completes.

Transmission Interval Configuration:
- DIP switches 4–8 set the reporting interval (1 s – 75 min).
- Power cycle required after changing settings.

ZigBee Reset:
- Press and hold link switch 5 s; both LEDs illuminate, then blue LED returns to “ready to join” state.

---

### 7. Performance & Capabilities

- Measurement Precision: ±0.5 °C / ±5 % RH ensures reliable environmental data for control systems.
- Wireless Range: Up to 200 m (656 ft) line‑of‑sight; typical indoor range ≈ 100 m (328 ft).
- Transmission Interval: Adjustable from 1 second to 75 minutes, allowing optimization between data granularity and network traffic.
- Network Reliability: Proven 99.999 % communication success rate under 150 ms timeout conditions.
- Power Efficiency: Typical consumption ≈ 150 mW; suitable for continuous operation in powered environments.
- Routing Functionality: Acts as a repeater to strengthen ZigBee mesh networks.
- Environmental Durability: Operates from −20 °C to +80 °C and 0–95 % RH, suitable for industrial and laboratory conditions.
- Limitations: Requires constant 5 V DC power (not battery‑operated); installation should avoid high‑moisture or corrosive environments.

---

### 8. Standards & Compliance

- Wireless Standard: IEEE 802.15.4 (ZigBee 2007/PRO)
- Profile Compliance: ZigBee Home Automation (HA) Profile
- Communication Protocols: UART (Modbus RTU) and ZigBee HA
- Certifications: CE / FCC (electromagnetic compatibility and radio compliance)
- Environmental & Safety: Designed for indoor use; complies with general electronic safety standards.
- Interoperability: Fully compatible with ZigBee HA‑certified devices and Nietzsche Enterprise’s ZigBee ecosystem (routers, coordinators, gateways).

---

### 9. Additional Information

Warranty & Support:
Nietzsche Enterprise provides standard product warranty coverage (duration subject to regional policy). Technical support and firmware updates are available via official channels.

Maintenance:
- Periodically verify sensor calibration using QuickView software.
- Keep sensor clean and free from dust or condensation.
- Avoid exposure to liquids or corrosive gases.
- Power off the device when not in use to reduce RF traffic and energy consumption.

Software & Updates:
- QuickView: Used for OTA calibration, configuration, and data visualization.
- Data PS: Optional data processing and logging software.
- Firmware updates may be released to enhance ZigBee compatibility or performance; updates can be applied via OTA when supported.

Safety Notices:
- Do not disassemble or expose the unit to liquids.
- Use only manufacturer‑approved accessories and power adapters.
- Ensure proper ventilation and avoid heat sources during installation.

Manufacturer’s Rights:
Nietzsche Enterprise reserves the right to modify product design, specifications, or firmware without prior notice.

---

### Summary

The Nietzsche Enterprise STH‑M02ZB ZigBee Temperature and Humidity Sensor is a compact, high‑precision environmental monitoring device engineered for modern wireless automation systems. Combining a MEMS‑based sensing element with ZigBee HA‑compliant wireless communication, it delivers accurate, real‑time environmental data across robust mesh networks. Its extended range, routing capability, and OTA calibration support make it ideal for scalable deployments in smart buildings, laboratories, and industrial facilities.

With flexible installation options, multiple power supply choices, and proven communication reliability, the STH‑M02ZB provides a professional‑grade solution for integrating temperature and humidity monitoring into any ZigBee‑based automation or data acquisition infrastructure.