Nicu Hodos
89da9a80e8
- move code for all devices in dedicated folder - move code for gateway in the root folder
15 lines
822 B
Markdown
15 lines
822 B
Markdown
# Temperature sensor
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It uses a [TMP36](https://cloud.hodos.ro/wiki/ha/datasheets/TMP35_36_37.pdf) to read temperature and it is optimised for power consumption.
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It uses watch dog that wakes every 8s and increments a counter. Once the counter reaches a certain value (e.g. equivalent to 1 hour), it will read and send temperature to the gateway.
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Every 12 hours the voltage is also read and sent.
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According to the [battery life calculator](https://www.allaboutcircuits.com/tools/battery-lifetime-calculator/), a cell coin battery with a capacity of `200mAh` should last for
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`~ 3 years`, given that:
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- Current consumption of device during sleep is `4.5uA`
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- Device wakes up every `hour`
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- Current consumption of device during wake is `10mA`
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- Duration of wake time is `1000 ms`
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