N28
N28 is a ATtiny84 based PCB with a door sensor and a temperature/humidity sensor.
Overview
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Role: Door sensor with temp sensor
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MCU: AtTiny84
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Connection: RJ45
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COM: COM2W
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Predecessor: N21, N16
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Periphery:
- door sensor (TCRT1000)
- TWI interface
- SI7021 temperature and humidity sensor
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Apps:
- NETWORK : Basic network functionality (address setup etc.)
- REPORTSENSORS: report sensor data from temperature sensor etc.
- STATS : periodically send stats data
- DOOR : watch door/window sensor and notify about state changes
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Values:
- SI7021_TEMP : temperature
- SI7021_HUM : humidity
- DOOR : state of door/window (0=closed, >0=open)
Schematic
PCB Front
PCB Back
