105 lines
1.4 KiB
Markdown
105 lines
1.4 KiB
Markdown
# BH1750 模块
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##引用
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```lua
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bh1750 = require("bh1750")
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```
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## 释放
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```lua
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bh1750 = nil
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package.loaded["bh1750"]=nil
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```
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<a id="bh1750_init"></a>
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##init()
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####描述
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设置BH1750所在的I2C引脚<br />
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####语法
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init(sda, scl)
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####参数
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sda: 1~12, IO index.<br />
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scl: 1~12, IO index.<br />
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####返回值
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nil
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####示例
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```lua
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SDA_PIN = 6 -- sda pin, GPIO12
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SCL_PIN = 5 -- scl pin, GPIO14
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bh1750 = require("bh1750")
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bh1750.init(SDA_PIN, SCL_PIN)
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-- release module
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bh1750 = nil
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package.loaded["bh1750"]=nil
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```
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####参见
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**-** []()
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<a id="bh1750_read"></a>
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##read()
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####描述
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从bh1750中读取光线传感器数据（Lux勒克斯）.<br />
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####语法
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read()
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####参数
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nil.<br />
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####返回值
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nil.<br />
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####示例
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```lua
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SDA_PIN = 6 -- sda pin, GPIO12
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SCL_PIN = 5 -- scl pin, GPIO14
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bh1750 = require("bh1750")
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bh1750.init(SDA_PIN, SCL_PIN)
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bh1750.read()
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-- release module
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bh1750 = nil
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package.loaded["bh1750"]=nil
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```
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####参见
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**-** []()
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<a id="bh1750_getlux"></a>
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##getlux()
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####描述
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从BH1750中提取数据.<br />
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####语法
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getlux()
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####参数
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nil.<br />
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####返回值
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l: 整数，Lux计数
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####示例
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```lua
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SDA_PIN = 6 -- sda pin, GPIO12
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SCL_PIN = 5 -- scl pin, GPIO14
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bh1750 = require("bh1750")
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bh1750.init(SDA_PIN, SCL_PIN)
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bh1750.read()
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l = bh1750.getlux()
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print("lux: "..(l / 100).."."..(l % 100).." lx")
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-- release module
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bh1750 = nil
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package.loaded["bh1750"]=nil
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```
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####参见
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**-** []()
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