Difference between revisions of "Matrix - Water Sensor"
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[[Matrix - Water Sensor/zh|查看中文]] | [[Matrix - Water Sensor/zh|查看中文]] | ||
+ | |||
+ | ==介绍== | ||
+ | [[File:Water Sensor.jpg|thumb|水位检测模块]] | ||
+ | * 模块Matrix-Water_Sensor是一个简易、性价比较高的水位/水滴识别检测传感器模块,适用于对液位高度的检测,可轻松完成水量到模拟信号的转换。 | ||
+ | * 灵敏度可通过电位器调节。 | ||
+ | |||
+ | ==特性== | ||
+ | * 使用标准的3 PIN接口 | ||
+ | * 尺寸为 16x60mm | ||
+ | * PCB尺寸(mm):16x60 | ||
+ | [[File:Soil_Moisture_Sensor.png | frameless|350px|Water Sensor.PCB]] | ||
+ | |||
+ | * 引脚说明: | ||
+ | {| class="wikitable" | ||
+ | |- | ||
+ | |名称 || 描述 | ||
+ | |- | ||
+ | |S || GPIO | ||
+ | |- | ||
+ | |V || 电源5V | ||
+ | |- | ||
+ | |G || 地 | ||
+ | |} | ||
+ | |||
+ | ==工作原理== | ||
+ | * 模块通过一系列暴露的平行导线线迹,利用线迹电极间的电阻与液位高度成比例,测量水量大小从而判断水位。 | ||
+ | 利用线迹电极间的电阻与雨滴量成比例,测量是否下雨。 | ||
+ | |||
+ | ==硬件连接== | ||
+ | 模块Matrix-Water_Sensor输出的是模拟信号,需要使用ADC转换模块Matrix-Analog_to_Digital_Converter将模拟信号转换为数字信号。<br> | ||
+ | 关于模块Matrix-Analog_to_Digital_Converter的使用方法可参考wiki:[[Matrix_-_Analog_to_Digital_Converter/zh|Matrix-Analog_to_Digital_Converter]]。<br> | ||
+ | |||
+ | ===连接NanoPi M1=== | ||
+ | 参考下图连接模块:<br> | ||
+ | [[File:Matrix-Water_Sensor_nanopi_m1.jpg|frameless|600px|Matrix-Water_Sensor_nanopi_m1]] | ||
+ | |||
+ | 连接说明: | ||
+ | {| class="wikitable" | ||
+ | |- | ||
+ | |Matrix-Water_Sensor || | ||
+ | |- | ||
+ | |GND || NanoPi M1 Pin9 | ||
+ | |- | ||
+ | |5V || NanoPi M1 Pin2 | ||
+ | |- | ||
+ | |S || Matrix-Analog_to_Digital_Converter A0 | ||
+ | |} | ||
+ | |||
+ | ===连接NanoPi 2=== | ||
+ | 参考下图连接模块:<br> | ||
+ | [[File:Matrix-Water_Sensor_nanopi_2.jpg|frameless|600px|Matrix-Water_Sensor_nanopi_2]] | ||
+ | |||
+ | 连接说明: | ||
+ | {| class="wikitable" | ||
+ | |- | ||
+ | |Matrix-Water_Sensor || | ||
+ | |- | ||
+ | |GND || NanoPi 2 Pin9 | ||
+ | |- | ||
+ | |5V || NanoPi 2 Pin2 | ||
+ | |- | ||
+ | |S || Matrix-Analog_to_Digital_Converter A0 | ||
+ | |} | ||
+ | |||
+ | ===连接NanoPi M2 / NanoPi 2 Fire=== | ||
+ | NanoPi M2和NanoPi 2 Fire的40 Pin引脚定义是一模一样的,所以它们操作Matrix配件的步骤是一样的,这里仅以NanoPi M2为例。<br> | ||
+ | 参考下图连接模块:<br> | ||
+ | [[File:Matrix-Water_Sensor_nanopi_m2.jpg|frameless|600px|Matrix-Water_Sensor_nanopi_m2]] | ||
+ | |||
+ | 连接说明: | ||
+ | {| class="wikitable" | ||
+ | |- | ||
+ | |Matrix-Water_Sensor || | ||
+ | |- | ||
+ | |GND || NanoPi M2 Pin9 | ||
+ | |- | ||
+ | |5V || NanoPi M2 Pin2 | ||
+ | |- | ||
+ | |S || Matrix-Analog_to_Digital_Converter A0 | ||
+ | |} | ||
+ | |||
+ | ===连接NanoPC-T2=== | ||
+ | 参考下图连接模块:<br> | ||
+ | [[File:Matrix-Water_Sensor_NanoPC-T2.jpg|frameless|600px|Matrix-Water_Sensor_NanoPC-T2]] | ||
+ | |||
+ | 连接说明: | ||
+ | {| class="wikitable" | ||
+ | |- | ||
+ | |Matrix-Potentiometer || | ||
+ | |- | ||
+ | |GND || NanoPC-T2 USB Host GND | ||
+ | |- | ||
+ | |5V || NanoPC-T2 USB Host 5V | ||
+ | |- | ||
+ | |S || Matrix-Analog_to_Digital_Converter A0 | ||
+ | |} | ||
+ | |||
+ | ==编译运行测试程序== | ||
+ | 启动开发板并运行Debian系统,进入系统后克隆Matrix代码仓库: | ||
+ | <syntaxhighlight lang="bash"> | ||
+ | $ apt-get update && apt-get install git | ||
+ | $ git clone https://github.com/friendlyarm/matrix.git | ||
+ | </syntaxhighlight> | ||
+ | 克隆完成后会得到一个名为matrix的目录。 | ||
+ | |||
+ | 编译并安装Matrix: | ||
+ | <syntaxhighlight lang="bash"> | ||
+ | $ cd matrix | ||
+ | $ make && make install | ||
+ | </syntaxhighlight> | ||
+ | |||
+ | 运行测试程序: | ||
+ | <syntaxhighlight lang="bash"> | ||
+ | $ matrix-adc | ||
+ | </syntaxhighlight> | ||
+ | 注意:此模块并不支持热插拔,启动系统前需要确保硬件连接正确。<br> | ||
+ | 运行效果如下:<br> | ||
+ | <syntaxhighlight lang="bash"> | ||
+ | The channel0 value is 2460 | ||
+ | </syntaxhighlight> | ||
+ | |||
+ | ==代码说明== | ||
+ | 所有的开发板都共用一套Matrix代码,本模块的测试示例代码为matrix-analog_to_digital_converter,内容如下: | ||
+ | <syntaxhighlight lang="c"> | ||
+ | int main(int argc, char ** argv) | ||
+ | { | ||
+ | int i = 0; | ||
+ | int value = 0; | ||
+ | int channel = 0; | ||
+ | |||
+ | if (boardInit() < 0) { | ||
+ | printf("Fail to init board\n"); | ||
+ | return -1; | ||
+ | } | ||
+ | |||
+ | if (argc == 2) | ||
+ | channel = atoi(argv[1]); | ||
+ | system("modprobe "DRIVER_MODULE); | ||
+ | signal(SIGINT, intHandler); | ||
+ | for (i=0; i<ADC_READ_TIMES; i++) { | ||
+ | if (pcf8591Read(channel, &value) != -1) { | ||
+ | printf("The channel%d value is %d\n", channel, value); | ||
+ | } else { | ||
+ | printf("Fail to get channel%d value\n", channel); | ||
+ | } | ||
+ | } | ||
+ | system("rmmod "DRIVER_MODULE); | ||
+ | |||
+ | return 0; | ||
+ | } | ||
+ | </syntaxhighlight> | ||
+ | API说明参考维基:[[Matrix API reference manual/zh|Matrix API reference manual]] <br> | ||
+ | |||
+ | ==相关资料== |
Revision as of 13:59, 28 June 2016
Contents
1 介绍
- 模块Matrix-Water_Sensor是一个简易、性价比较高的水位/水滴识别检测传感器模块,适用于对液位高度的检测,可轻松完成水量到模拟信号的转换。
- 灵敏度可通过电位器调节。
2 特性
- 使用标准的3 PIN接口
- 尺寸为 16x60mm
- PCB尺寸(mm):16x60
- 引脚说明:
名称 | 描述 |
S | GPIO |
V | 电源5V |
G | 地 |
3 工作原理
- 模块通过一系列暴露的平行导线线迹,利用线迹电极间的电阻与液位高度成比例,测量水量大小从而判断水位。
利用线迹电极间的电阻与雨滴量成比例,测量是否下雨。
4 硬件连接
模块Matrix-Water_Sensor输出的是模拟信号,需要使用ADC转换模块Matrix-Analog_to_Digital_Converter将模拟信号转换为数字信号。
关于模块Matrix-Analog_to_Digital_Converter的使用方法可参考wiki:Matrix-Analog_to_Digital_Converter。
4.1 连接NanoPi M1
连接说明:
Matrix-Water_Sensor | |
GND | NanoPi M1 Pin9 |
5V | NanoPi M1 Pin2 |
S | Matrix-Analog_to_Digital_Converter A0 |
4.2 连接NanoPi 2
参考下图连接模块:
Matrix-Water_Sensor_nanopi_2
连接说明:
Matrix-Water_Sensor | |
GND | NanoPi 2 Pin9 |
5V | NanoPi 2 Pin2 |
S | Matrix-Analog_to_Digital_Converter A0 |
4.3 连接NanoPi M2 / NanoPi 2 Fire
NanoPi M2和NanoPi 2 Fire的40 Pin引脚定义是一模一样的,所以它们操作Matrix配件的步骤是一样的,这里仅以NanoPi M2为例。
参考下图连接模块:
连接说明:
Matrix-Water_Sensor | |
GND | NanoPi M2 Pin9 |
5V | NanoPi M2 Pin2 |
S | Matrix-Analog_to_Digital_Converter A0 |
4.4 连接NanoPC-T2
参考下图连接模块:
Matrix-Water_Sensor_NanoPC-T2
连接说明:
Matrix-Potentiometer | |
GND | NanoPC-T2 USB Host GND |
5V | NanoPC-T2 USB Host 5V |
S | Matrix-Analog_to_Digital_Converter A0 |
5 编译运行测试程序
启动开发板并运行Debian系统,进入系统后克隆Matrix代码仓库:
$ apt-get update && apt-get install git $ git clone https://github.com/friendlyarm/matrix.git
克隆完成后会得到一个名为matrix的目录。
编译并安装Matrix:
$ cd matrix $ make && make install
运行测试程序:
$ matrix-adc
注意:此模块并不支持热插拔,启动系统前需要确保硬件连接正确。
运行效果如下:
The channel0 value is 2460
6 代码说明
所有的开发板都共用一套Matrix代码,本模块的测试示例代码为matrix-analog_to_digital_converter,内容如下:
int main(int argc, char ** argv) { int i = 0; int value = 0; int channel = 0; if (boardInit() < 0) { printf("Fail to init board\n"); return -1; } if (argc == 2) channel = atoi(argv[1]); system("modprobe "DRIVER_MODULE); signal(SIGINT, intHandler); for (i=0; i<ADC_READ_TIMES; i++) { if (pcf8591Read(channel, &value) != -1) { printf("The channel%d value is %d\n", channel, value); } else { printf("Fail to get channel%d value\n", channel); } } system("rmmod "DRIVER_MODULE); return 0; }
API说明参考维基:Matrix API reference manual