Description Seeed Studio Grove Temperature & Humidity Sensor (DHT11) is a low-cost Grove digital temperature and humidity module based on the upgraded DHT11 sensor. It combines a capacitive humidity sensing element, an NTC temperature sensor, and built-in digital conversion so a microcontroller can read calibrated data through a simple single-bus signal. The module supports 3.3V and 5V systems and is suitable for DIY weather stations, smart home automation, classroom experiments, and environmental monitoring prototypes with Arduino, Raspberry Pi, and Grove-compatible controllers. Features Measures relative humidity and temperature with calibrated digital output. Uses a capacitive humidity sensor and NTC thermistor for stable sensing. Built-in ADC and single-bus digital signal help save microcontroller I/O resources. Low power consumption and long-term stability for continuous monitoring projects. Grove connector makes it quick to prototype with Arduino, Raspberry Pi, and Grove systems. Applications DIY weather stations Smart home temperature and humidity monitoring Humidity control experiments Air-conditioner or ventilation prototypes Classroom and maker environmental sensing projects Specifications Parameter Value Operating voltage 3.3V / 5V Sensor type Capacitive relative humidity sensor and NTC thermistor Output Grove digital single-bus signal Humidity range 5% to 95% RH Humidity accuracy +/-5% RH Temperature range -20 to 60 deg C Temperature accuracy +/-2 deg C Measuring current 1.3 to 2.1 mA Average current 0.5 to 1.1 mA Signal collecting period 2 s Interface 2.0mm Grove pin header Board size 40 x 20 mm IO structure SIG, VCC, GND, NC Battery Exclude Hardware Overview The module outputs a calibrated digital signal, so it can be connected to a supported microcontroller through the Grove digital connector without adding an external ADC. The DHT11 is a cost-effective choice when the project needs simple temperature and humidity data rather than industrial-grade accuracy. Part List Grove - Temperature & Humidity Sensor (DHT11) x 1 Grove cable x 1 Other Content Wiki usage note: according to the product wiki, this sensor will not work for temperatures below 0 deg C. Resources Grove Temperature & Humidity Sensor (DHT11) wiki document Grove Temperature & Humidity Sensor schematic and Eagle files DHT11 sensor datasheet Grove Temperature & Humidity Sensor Arduino library Grove Temperature & Humidity Sensor CDC file FAQ What voltage does this sensor support? It supports 3.3V and 5V operation, making it suitable for many Grove-compatible development boards. Can it be used with Arduino or Raspberry Pi? Yes. The official wiki provides Arduino and Raspberry Pi examples, and Seeed also provides an Arduino library for this sensor family. What is the main difference from DHT20 or DHT22 modules? DHT11 is the lower-cost option. It is useful for simple monitoring projects, while DHT20 and DHT22 offer wider ranges or higher accuracy. Can it measure below 0 deg C? The wiki notes that this sensor will not work for temperatures below 0 deg C, so use it within the recommended conditions for reliable results.
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