XY-MD02 SHT20 Temperature Humidity Sensor Modbus RTU Module
XY-MD02 SHT20 Temperature & Humidity Sensor Module – Modbus RTU
The XY-MD02 is a precision temperature and humidity sensor module using the SHT20 sensor chip, communicating via Modbus RTU over RS485. It provides accurate environmental data for industrial automation, greenhouses, and weather monitoring. With a wide voltage range and robust protocol, it integrates easily with PLCs and microcontrollers.
Key Specifications
| Specification | Value |
|---|---|
| Sensor | Sensirion SHT20 |
| Interface | RS485, Modbus RTU |
| Temperature Range | -40°C to +125°C |
| Humidity Range | 0% to 100% RH |
| Accuracy | ±0.3°C (temp), ±3% RH (humidity, typical) |
| Power Supply | 3.3V to 5.5V DC |
What You Can Build With This
- Industrial environmental monitoring system with PLC logging
- Smart greenhouse climate control using Raspberry Pi
- Server room temperature and humidity alert system
- Home automation weather station with Modbus gateway
Compatibility
The module works with any device supporting Modbus RTU over RS485, such as Arduino with MAX485 converter, ESP32 with RS485 transceiver, industrial PLCs, and Raspberry Pi with USB-RS485 adapter. It operates at 3.3V to 5.5V logic levels.
Wiring Notes
Connect A (non-inverting) and B (inverting) to your RS485 bus, and power with 3.3–5.5V DC. For long cable runs, use 120Ω termination resistors at both ends of the line.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino?
Yes, you can interface it with Arduino using an RS485 transceiver module like MAX485. Wire RO, DI, RE, DE pins appropriately and use a Modbus library.
Can I use this with 5V systems?
The module accepts 3.3V to 5.5V power, so it works directly with 5V systems without level shifting.
What is the default Modbus address?
The default Modbus slave address is usually 1, but you can modify it via Modbus commands using the configuration register.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items