temp-humidity interface

[iot-root]

Requirements

The temp-humidity interface should have:

• [x] read temp method
• [x] read humidity method

Notes:

• Sensor: DHT20 (data sheet)
  • https://www.adafruit.com/product/5183#technical-details
  • python class ref: AM2320
  • Use with 3.3V or 5V power/logic
  • I2C address 0x38 Operational Temperature range: -40 to 85 °C (+-1 °C typical accuracy over entire range) Operational Relative Humidity range: 0 to 100 RH% (+-3 % typical accuracy over entire range)
• Comm Protocol: i2c
• I2C_ADDR: 0x5c
• I2C_SLAVE: 0x0703

Note: need to support both DHT20 and AM2320