44 lines
1.4 KiB
Markdown
44 lines
1.4 KiB
Markdown
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# AM2320 Module
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| Since | Origin / Contributor | Maintainer | Source |
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| :----- | :-------------------- | :---------- | :------ |
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| 2016-02-14 | [Henk Vergonet](https://github.com/hvegh) | [Henk Vergonet](https://github.com/hvegh) | [am2320.c](../../app/modules/am2320.c)|
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This module provides access to the [AM2320](https://akizukidenshi.com/download/ds/aosong/AM2320.pdf) humidity and temperature sensor, using the i2c interface.
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## am2320.read()
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Samples the sensor and returns the relative humidity in % and temperature in celsius, as an integer multiplied with 10.
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#### Syntax
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`am2320.read()`
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#### Returns
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- `relative humidity` percentage multiplied with 10 (integer)
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- `temperature` in celcius multiplied with 10 (integer)
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#### Example
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```lua
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sda, scl = 1, 2
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i2c.setup(0, sda, scl, i2c.SLOW) -- call i2c.setup() only once
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am2320.setup()
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rh, t = am2320.read()
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print(string.format("RH: %s%%", rh / 10))
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print(string.format("Temperature: %s degrees C", t / 10))
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```
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## am2320.setup()
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Initializes the module. Returns model, version, serial but is seams these where all zero on my model.
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#### Syntax
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`model, version, serial = am2320.setup()`
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#### Parameters
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None
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#### Returns
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- `model` 16 bits number of model
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- `version` 8 bits version number
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- `serial` 32 bits serial number
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Note: I have only observed values of 0 for all of these, maybe other sensors return more sensible readings.
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