Model XYTR01 temperature and humidity control module for relaydriven heating and cooling equipment. Compact and easy to integrate, it provides automatic mode detection, adjustable calibration, and simple humidity set up for reliable environmental control. Key features Automatic work mode identification: the controller compares the configured start and stop temperatures to select cooling or heating mode. If start temperature is higher than stop temperature, the device uses cooling mode; otherwise it uses heating mode. Relay output control: a relay switches external refrigeration or heating equipment. A red LED indicates relay conduction and active output. Cooling and heating behavior: in the selected mode, when the measured temperature reaches the configured start temperature the relay closes and the LED turns on to start equipment. When the measured temperature reaches the configured stop temperature the relay opens and the LED turns off to stop equipment. Temperature calibration: adjustable correction value from 10.0 to 10 C. The actual temperature used for control equals measured temperature plus the calibration value. Humidity set up: enter start or stop humidity set screens by long pressing keys. From the running interface, long press RH plus for more than 3 seconds to set starting humidity. Long press RH minus for more than 3 seconds to set stop humidity. Use RH plus and RH minus to change values. The controller will automatically exit and save after 6 seconds of inactivity. Integrated sensor probe for combined temperature and humidity measurement. Specifications Model: XYTR01 Temperature range: 20 to 60 C Humidity range: 0 to 100 percent RH Control probe: integrated sensor Output type: relay output Size: 57 x 60 x 20 mm Weight: approx. 77 g / 2.7 oz What you get 1 x Temperature and humidity Module (XYTR01) Benefits and why this product is useful Simplifies environmental control by automatically selecting cooling or heating mode based on your setpoints, reducing manual configuration. Relay output and LED status make it easy to integrate with and monitor refrigeration, heating, humidifying, or dehumidifying equipment. Builtin calibration corrects sensor drift over long operation, improving longterm accuracy. Compact size and integrated probe reduce installation complexity and save space. Practical applications Greenhouse climate control: maintain target temperature and humidity ranges for plant growth by switching heaters, fans, humidifiers, or dehumidifiers. Storage and cold rooms: automate refrigeration control to protect temperature sensitive stock while logging stable humidity. Terrariums and incubators: keep consistent environmental conditions by automatically controlling heating and moisture systems. Operation notes The controller uses the relationship between start and stop temperatures to choose mode. Configure start and stop values carefully to define the intended hysteresis and control behavior. Use the temperature correction function to offset any known sensor error. Enter calibration values between 10.0 and 10 C. Set humidity start and stop values from the running interface using long presses of RH plus or RH minus, then adjust with the same keys. The controller saves changes automatically after 6 seconds. This module offers straightforward, adjustable control for a wide range of heating and cooling applications where reliable temperature and humidity regulation is required.