HomeIO : Automatically actuated ac vents and smart thermostat
Electronics, Firmware, & Mechanical design
HomeIO is a system of smart vents and a central thermostat that allows zone control of a house without dampeners. The system is cheap and easy to install. The vents are daisy-chained together and each is motorized and has sensors.
Vents consist of:
- 8-bit micro
- Isolated RS-485 bus
- Motor driver (using stall current to detect open or shut)
- BMP280 (pressure, temperature, humidity sensor)
- Ambient light sensor
- Capacitive touch pad (for setup ID assigning during installation)
Thermostat control board consists of:
- 6 solid-state relays for system control (AC, heater, furnace, etc.)
- ARM M0+ micro
- Isolated RS-485 bus
- Power management and monitoring circuitry (short-circuit protection, ESD protection)
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- Smart vent (back view)
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- Thermostat control board (old)
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- Thermostat control board
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- Thermostat control board (newest)
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- Vent board (old)
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- 3D printed smart vent
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- Test board for thermo-electric generator tests
