Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Communication Protocol	I2C
Operating Voltage	2.4V to 5.5V
Temperature Range	-40°C to +125°C
Humidity Range	0% to 100% RH
Temperature Accuracy	±0.3°C (typical)
Humidity Accuracy	±2% RH (typical)
Interface Type	Digital I2C
Package Type	DFN-8 Module
Response Time	< 8 seconds (63% RH)
Compatibility	Direct replacement for SHT30

6 reviews

Anonymous

Mar 31, 2026

Rating: 5/5

Compact and robust

The module form factor is tiny but sturdy. I've soldered five of these onto custom PCBs without any failures. They handle the reflow process well and provide immediate accurate data upon boot.

Anonymous

Mar 26, 2026

Rating: 5/5

Perfect drop-in replacement

I needed a sensor compatible with my existing SHT30 codebase, and this CJ-GXHT30 worked flawlessly right out of the box. The I2C address matched perfectly, and readings are consistent with my calibrated reference meter.

Anonymous

Mar 25, 2026

Rating: 5/5

Easy to use for beginners

As someone new to I2C sensors, this was surprisingly easy to get running with Arduino libraries. The example code provided by the community works instantly. Great value for student projects.

Anonymous

Mar 15, 2026

Rating: 5/5

Reliable I2C communication

Integrated easily with an ESP32. No noise issues on the bus, and the data integrity checks built into the protocol work well. Highly recommend for any IoT environmental monitoring setup.

Anonymous

Mar 10, 2026

Rating: 4/5

Great accuracy for the price

Using these in a small hobby greenhouse project. The humidity readings seem very stable, and the temperature response is quick. Only giving 4 stars because the documentation could be slightly more detailed regarding power consumption modes.

Anonymous

Mar 01, 2026

Rating: 4/5

Good performance, minor heating effect

Overall excellent sensor. Just note that if you poll it extremely frequently, there is a slight self-heating effect on the temperature reading. Slowing down the polling interval solved this for my application.

5 FAQ

Q: What is the default I2C address?

A: The default 7-bit I2C address is typically 0x44. Some batches may also support 0x45 depending on the ADDR pin configuration, but 0x44 is the standard for direct SHT30 replacement.

Q: How do I calibrate the sensor?

A: The sensor comes factory-calibrated. Software offset correction can be applied in your code if you have a known reference point, but hardware recalibration is not supported or required for general use.

Q: Can this sensor be used outdoors?

A: While the sensor itself is accurate in various conditions, the module board is not IP-rated for water resistance. For outdoor use, please house it in a weatherproof enclosure with proper ventilation.

Q: Do I need to install any specific drivers?

A: No external drivers are required. The sensor communicates via standard I2C, so you only need an I2C library compatible with your microcontroller platform (e.g., Wire library for Arduino).

Q: Is this module compatible with 3.3V logic levels?

A: Yes, the CJ-GXHT30 operates within a voltage range of 2.4V to 5.5V, making it fully compatible with both 3.3V and 5V microcontroller systems.

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