2.3 Project Requirements and Specifications The reason we settled on the following requirements as shown in the list below was due to the level of fine-grained controls we sought to achieve. After multiple discussions about our requirements for the HVAC system we have created a list of what we feel was satisfactory to accomplish this project in its entirety. The following list shows our requirements for display accuracy for our HVAC Controller: Temperature ±1°F Humidity ±4% CO2 ±40 ppm The next list our Sensor Accuracy: Temperature ±0.125°F Humidity ±4% relative CO2 At least ±40 ppm Finally, our requirements for the System accuracy for the HVAC Controller are as follows: Temperature ±1°F Humidity ±4% As per the above requirements, we have created a list of specifications to satisfy these set requirements. For the Thermostat (RSM) we feel the specifications as follows are appropriate: 1 CO2 Sensor with accuracy ±40 ppm 1 Humidity Sensor with accuracy ±4% relative 1 Temperature Sensor with accuracy ±0.125°F 1 16 Bit Microcontroller 1 LCD for displaying temperature and humidity readings Operating Temperature Range of 20-50°C 3 Momentary on push button switches 900 Mhz UART, SPI support For the Main Control Unit the group feels the following specifications are appropriate: 900 Mhz Radio Ethernet enabled SPI, UART support Web Server w/ CGI (Common Gateway Interface) 1 16 Bit Microcontroller
2.3 Project Requirements and Specifications The reason we settled on the following requirements as shown in the list below was due to the level of fine-grained controls we sought to achieve. After multiple discussions about our requirements for the HVAC system we have created a list of what we feel was satisfactory to accomplish this project in its entirety. The following list shows our requirements for display accuracy for our HVAC Controller: Temperature ±1°F Humidity ±4% CO2 ±40 ppm The next list our Sensor Accuracy: Temperature ±0.125°F Humidity ±4% relative CO2 At least ±40 ppm Finally, our requirements for the System accuracy for the HVAC Controller are as follows: Temperature ±1°F Humidity ±4% As per the above requirements, we have created a list of specifications to satisfy these set requirements. For the Thermostat (RSM) we feel the specifications as follows are appropriate: 1 CO2 Sensor with accuracy ±40 ppm 1 Humidity Sensor with accuracy ±4% relative 1 Temperature Sensor with accuracy ±0.125°F 1 16 Bit Microcontroller 1 LCD for displaying temperature and humidity readings Operating Temperature Range of 20-50°C 3 Momentary on push button switches 900 Mhz UART, SPI support For the Main Control Unit the group feels the following specifications are appropriate: 900 Mhz Radio Ethernet enabled SPI, UART support Web Server w/ CGI (Common Gateway Interface) 1 16 Bit Microcontroller
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