Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Sensor Model	SHT20
Communication Protocol	Modbus RTU over RS485
Temperature Range	-40°C to +125°C
Humidity Range	0% to 100% RH
Temperature Accuracy	±0.3°C
Humidity Accuracy	±2% RH
Supply Voltage	3.3V to 5.5V DC
Interface Type	RS485 Two-Wire
Response Time	8 seconds (typical)
Package Type	DFN Package with Protective Cap

6 reviews

Anonymous

Mar 18, 2026

Rating: 4/5

Reliable but needs careful wiring

The sensor accuracy is excellent for my greenhouse automation project. Just make sure you use proper termination resistors on the RS485 line, otherwise, you might get some noise in the data.

Anonymous

Mar 16, 2026

Rating: 5/5

Perfect for Industrial Monitoring

Integrated this module into our warehouse monitoring system. The Modbus communication is stable and the readings match our calibrated reference instruments almost perfectly. Very easy to set up the slave ID.

Anonymous

Mar 09, 2026

Rating: 5/5

Works flawlessly with Home Assistant

Connected via a USB-to-RS485 adapter to my server. Home Assistant picks it up immediately using the Modbus integration. Temperature and humidity updates are consistent every 10 seconds.

Anonymous

Mar 08, 2026

Rating: 4/5

Solid build quality

We deployed ten of these in a manufacturing floor environment. They have held up well against dust and minor vibrations. One unit had a slightly loose terminal block, but tightening it fixed the issue.

Anonymous

Mar 08, 2026

Rating: 5/5

Great value for high precision

I've tested several SHT20 breakout boards, and this RS485 version is the most robust for long-distance runs. The documentation provided by the seller was clear regarding the register map.

Anonymous

Mar 03, 2026

Rating: 5/5

Exactly as described

High precision as advertised. The response time is quick enough for our HVAC logging requirements. Shipping was fast and the packaging protected the sensitive components well.

5 FAQ

Q: What is the default baud rate and slave address?

A: The default baud rate is 9600 bps, and the default slave address is 1. Both can be modified via specific Modbus registers if your network requires different settings.

Q: What is the maximum cable length supported for RS485 communication?

A: Under ideal conditions with proper shielding and termination, RS485 can support cable lengths up to 1200 meters. Ensure you use twisted pair cables for best results.

Q: Is there a Python library available to read data from this specific module?

A: Since it uses standard Modbus RTU, you can use any generic Python Modbus library like pymodbus or minimalmodbus. We provide a sample script in the product documentation download section.

Q: Does this module come with pull-up resistors for the RS485 lines?

A: The module includes the necessary transceiver circuitry, but we recommend adding external termination resistors (120 ohm) at both ends of your long bus cable for optimal signal integrity.

Q: Can this sensor operate outdoors in direct rain?

A: While the SHT20 sensor element has a protective cap, the PCB and terminals are not waterproof. For outdoor use, please install the module inside an IP65-rated enclosure.

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