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Dependencies: mbed
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Seeed_Grove_Alcohol_Sensor_Example
by 
Seeed
Prerequisite
This Program is an example of how to get analog data with WIZwiki-W7500 board A0 Pin.
To implement this function, you need a Platform board only.
- WIZwiki-W7500 from WIZnet (Platform board) http://wizwiki.net/wiki/doku.php?id=products:wizwiki_w7500:start
- Grove - Alcohol Sensor
Hardware Configuration
WIZwiki-W7500 Pin map
Initialize an analog pin
Initialize an A0 pin of WIZwiki-W7500 platform as an analog pin.
Read analog data from analog pin
Connect an analog device, such as an Alcohol sensor, to A0 pin. And read analog data.
Software
main.cpp
#include "mbed.h"
DigitalOut heater(A1);
AnalogIn sensor(A0);
DigitalOut led_r(LEDR);
DigitalOut led_g(LEDG);
DigitalOut led_b(LEDB);
int main(void)
{
float value = 0.0f;
led_g = 0;
led_r = 0;
led_b = 0;
heater = 0;
wait(0.1f);
// Waiting for the sensor to warm-up
while(value > 0.001f) {
wait(1.0f);
value = 1.0f - sensor;
printf("Sensor is warming up : %2.2f\r\n", value);
}
led_g = 1;
led_r = 1;
led_b = 1;
while(1)
{
value = 1- sensor;
printf("%2.1f\r\n", value);
if(value < 0.3)
{
led_g = 0;
led_r = 1;
led_b = 1;
}
else if(value < 0.7)
{
led_g = 1;
led_r = 1;
led_b = 0;
}
else
{
led_g = 1;
led_r = 0;
led_b = 1;
}
wait(1);
}
}
Images
Before alcohol test
During alcohol test
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