# Light intensity sensor BH1750FVI_i2c

<span style="font-size:16px;">Reference tutorial</span>
<span style="font-size:16px;">
[bh1750FVI Chinese Data Manual-Baidu Library (baidu.com)](https://wenku.baidu.com/view/57203d05856a561252d36ff6.html "bh1750FVI Chinese Data Manual-Baidu Library (baidu.com)")
[GY-30 light intensity sensor](https://wenku.baidu.com/view/57203d05856a561252d36ff6.html "GY-30 light intensity sensor")
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![](././../../images_dir/1625020583/1.png)
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<span style="font-size:16px;">BH1750FVI——i2c module installation diagram</span>

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![](././../../images_dir/1625020700/2.png)
![](././../../images_dir/1625020745/3.png)
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Source code path：
driver_210519 bh1750fvi_i2c
Powering code：bh1750fvi_drv.c
Compiler：
1、Copy "driver_210519 bh1750fvi_i2c" to the "lichee" directory in tina-d1 sdk
2、Enter bh1750fvi_i2c and execute the "make" command to generate the bh1750fvi_drv.ko file
3、Copy to the development board, execute insmod bh1750fvi_drv.ko, load the driver module, as shown below
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![](././../../images_dir/1625020815/4.png)
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<span style="font-size:16px;">Verify that the device is generated</span>

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![](././../../images_dir/1625020880/5.png)
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Device tree file and adding nodes：
driver_210519sunxi-dts board.dts
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rvboards_bh1750fvi:bh1750fvi@46{
	        compatible = "tina-d1,rvboards-bh1750fvi";
	        device_type = "sensor";
	        reg = <0x23>;
	         /*Address 0x46 when the ALT ADDRESS pin is grounded and 0xB8 when it is powered*/
	        alt_addr_gpio = <&pio PD 22 GPIO_ACTIVE_HIGH>;
	        status = "okay";
	    };

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User level test procedure：bh1750fvi_user.c
Compile and execute：
1、Copy bh1750fvi_user.c to the development board
2、Execute gcc -o bh1750fvi_user bh1750fvi_user.c to compile and generate bh1750fvi_user execution program
3、Test command：./ bh1750fvi_user /dev/bh1750fvi
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![](././../../images_dir/1625021109/6.png)
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![](././../../images_dir/1703141148/4.png)
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