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'''Let teh robots do it!'''
'''Let teh robots do it!'''


=== <span style="background:#0ff">Monitoring</span> ===
=== Monitoring ===


The two critical factors for monitoring are temperature and humidity. There is a readily available combined sensor for this, in the form of a DHT11 for less than a few dollars. However, the near 100% humidity environment is outside the operational range of this sensor. This sensor would be suitable for monitoring of the ambient surrounding indoor environment. There is a newer version of the sensor, a DHT12, this is smaller and the same price, with a functional range of 95% humidity. Alternatively a DHT22 has a full range of up to 100%, and better overall accuracy and sensitivity. These sensors are a little more than a few dollars and are also available as AM2302 which has short wire lead extensions. All of these sensors are 3-5 volt compatible and use a pair or wires for power, and a single data pin for I2C communication. A pull-up resistor of >5K Ohm may be needed, not that an internal pullup on a micro-controller is generally sufficient.
The two critical factors for monitoring are temperature and humidity. There is a readily available combined sensor for this, in the form of a DHT11 for less than a few dollars. However, the near 100% humidity environment is outside the operational range of this sensor. This sensor would be suitable for monitoring of the ambient surrounding indoor environment. There is a newer version of the sensor, a DHT12, this is smaller and the same price, with a functional range of 95% humidity. Alternatively a DHT22 has a full range of up to 100%, and better overall accuracy and sensitivity. These sensors are a little more than a few dollars and are also available as AM2302 which has short wire lead extensions. All of these sensors are 3-5 volt compatible and use a pair or wires for power, and a single data pin for I2C communication. A pull-up resistor of >5K Ohm may be needed, not that an internal pullup on a micro-controller is generally sufficient.
'''For sample code see: [[ESP8266/DHT]]'''


=== Temperature Control ===
=== Temperature Control ===
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