Voltage Sensor 0-25V 電壓檢測模塊

#include <Wire.h>

int val11; 
int val2; 

void setup() 
{   
 pinMode(LED1,OUTPUT);   
 Serial.begin(9600);   
 Serial.println("Emartee.Com");   
 Serial.println("Voltage: ");   
 Serial.print("V"); 
} 
void loop() 
{       
 float temp;       
 val11=analogRead(1);       
 temp=val11/4.092;       
 val11=(int)temp;//       
 val2=((val11%100)/10);       
 Serial.println(val2);          
 delay(1000); 
}