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Sensly HAT Hardware

MQ2

• LPG (Liquefied Petroleum Gas), i-butane, propane, methane ,alcohol, Hydrogen, smoke detector
• Datasheet

MQ7

• Carbon monoxide sensor
• Datasheet

MQ135

• NH3 (Ammonia), NOx (nitrogen oxides that are most relevant for air pollution), alcohol, Benzene, smoke, CO2
• Datasheet

Dust Sensor (Versions: Sharp GP2Y10 14 7218|...)

• [doc](https://www.sparkfun.com/datasheets/Sensors
  /gp2y1010au_e.pdf)

BME280

• Temperature/Humidity/Athmospheric pressure sensor
• |What|distant to HAT|On HAT| |Temp|20.2|31| |Hum|37.27|20|

I2C

On I2c interface,

• 0x05 is the HAT
  • 0x01 is MQ2
  • 0x02 is MQ7
  • 0x03 is MQ135
  • 0x04 is the Dust Sensor
    • For the moment always getting bytes [15,255]...
    • When physically disconnected getting bytes [5, 212],[5, 221],[5, 2??]
  • 0x07 is the LED
• 0x76 is the temperature sensor (BME280|)

Sensly HAT Sofware