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The DHT11 humidity and temperature sensor is an economical peripheral manufactured by D-Robotics UK ( www.droboticsonline.com ). It is capable of measuring relative humidity between 20 and 90% RH within the operating temperature range of 0 to 50°C, with an accuracy of ±5% RH. Additionally, temperature is measured in the range of 0 to 50°C, with an accuracy of ±2°C. Both values are returned with 8-bit resolution.