39 lines
1.1 KiB
Markdown
39 lines
1.1 KiB
Markdown
# AM2320 Module
|
|
|
|
This module provides access to the [AM2320](https://akizukidenshi.com/download/ds/aosong/AM2320.pdf) humidity and temperature sensor, using the i2c interface.
|
|
|
|
## am2320.init()
|
|
Initializes the module and sets the pin configuration. Returns model, version, serial but is seams these where all zero on my model.
|
|
|
|
#### Syntax
|
|
`model, version, serial = am2320.init(sda, scl)`
|
|
|
|
#### Parameters
|
|
- `sda` data pin
|
|
- `scl` clock pin
|
|
|
|
#### Returns
|
|
- `model` 16 bits number of model
|
|
- `version` 8 bits version number
|
|
- `serial` 32 bits serial number
|
|
|
|
Note: I have only observerd values of 0 for all of these, maybe other sensors return more sensible readings.
|
|
|
|
## am2320.read()
|
|
Samples the sensor and returns the relative humidity in % and temperature in celsius, as an integer multiplied with 10.
|
|
|
|
#### Syntax
|
|
`am2320.read()`
|
|
|
|
#### Returns
|
|
- `relative humidity` percentage multiplied with 10 (integer)
|
|
- `temperature` in celcius multiplied with 10 (integer)
|
|
|
|
#### Example
|
|
```lua
|
|
am2320.init(1, 2)
|
|
rh, t = am2320.read()
|
|
print(string.format("RH: %s%%", rh / 10))
|
|
print(string.format("Temperature: %s degrees C", t / 10))
|
|
|