ECE 110/120 Honors Lab Section : Sensor array with web interface...

Members: Dominico Lee, Patrick McMahon

Summary: A sensor array that can provide real-time temperature, humidity, air pressure, as well as CO, methane, and LPG levels.

Parts List:

Humidity and Temperature Sensor - RHT03 - https://www.sparkfun.com/products/10167

Carbon Monoxide Sensor - MQ-7 https://www.sparkfun.com/products/9403

Methane CNG Gas Sensor - MQ-4 https://www.sparkfun.com/products/9404

LPG Gas Sensor - MQ-6 https://www.sparkfun.com/products/9405

Barometric Pressure Sensor Breakout - BMP180 https://www.sparkfun.com/products/11824

Arduino with Ethernet Shield - Already supplied

Breadboard - https://www.sparkfun.com/products/12615

Jumper wires - https://www.sparkfun.com/products/10897

High Level Block Diagram

Low Level Block Diagram - Sensor Array

Microcontroller

Weekly Journal

Sept. 28 - Created the high level block diagram. Considered the pros and cons of using Arduino over Raspberry Pi.

Oct. 5 - Created the low level block diagram for the sensor array. Submitted the parts list to Nate.

Oct. 12 - Created the low level block diagram for the microcontroller.

Oct. 26 - Attempted to assemble the parts. Researched how to wire the MQ gas sensors and Arduino together.

Nov. 2 - Searched more into using MQ sensors. As the internal heater draws quite a bit of current, we would need to use a voltage regulator to bring Vin down to 5v, rather than using Arduino's power rail.

Nov. 9 - Received the sensors and Arduino. Wrote a simple code that prints the sensor readings to the serial monitor. Requested a 9v wall adaptor and a 5v voltage regulator.