Create README.md

README.md

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+[![license-badge][]][license] ![version] [![stars][]][stargazers] [![hit-count][]][count] [![github-issues][]][issues]
+
+# Aosong ASAIR AHT10 & AHT15
+
+This is an Arduino library for Aosong ASAIR AHT10, AHT15 Digital Humidity & Temperature Sensor
+
+- Supply voltage:               1.8v - 3.6v
+- Temperature range:            -40°C..+80°C
+- Temperature resolution:       0.01°C
+- Temperature accuracy:         ±0.3°C
+- Relative humidity range:      0%..100%
+- Relative humidity resolution: 0.024%
+- Relative humidity accuracy:   ±2%**
+- I²C bus speed:                0Hz - 400KHz
+- Recomended polling frequency: 8sec - 30sec
+
+
+Supports all sensors features:
+
+- read humidity***
+- read temperature***
+- soft reset
+
+Tested on:
+- Arduino AVR
+- Arduino ESP8266
+- Arduino STM32
+
+[license-badge]: https://img.shields.io/badge/License-GPLv3-blue.svg
+[license]:       https://choosealicense.com/licenses/gpl-3.0/
+[version]:       https://img.shields.io/badge/Version-1.0.0-green.svg
+[stars]:         https://img.shields.io/github/stars/enjoyneering/AHT10.svg
+[hit-count]:     http://hits.dwyl.io/enjoyneering/AHT10/badges.svg
+[count]:         http://hits.dwyl.io/enjoyneering/AHT10/badges
+[stargazers]:    https://github.com/enjoyneering/AHT10/stargazers
+[github-issues]: https://img.shields.io/github/issues/enjoyneering/AHT10.svg
+[issues]:        https://github.com/enjoyneering/AHT10/issues/
+
+**Prolonged exposure for 60 hours at humidity > 80% can lead to a temporary drift of the signal +3%. Sensor slowly returns to the calibrated state at normal operating conditions.
+
+***Library returns 255 if a communication error occurs