How to find the peak value of analog signal?

Question

I have a question .. Please help me I don't know how Arduino can read the peak value of the sensor signal. The value I want is in the ADC value .. What I want is ... for 5 seconds there will be 1 average value from the highest peak value of the sensor, and the ADC value. I will use pin A0, but I don't know how to code the program that I want. Please help me What is the code?

Answer 1

See if I understand this correctly: For a given time period you want to find the peak.

void setup()
{
 unsigned long int cur_time = 0 ;
 unsigned long int time_elapsed = 0;
 int peaks[20]; // say you want to find 20 peaks , 1 peak for data arriving between 5 secs
 int time_period = 5000; 
 int data = 0; 
 int mx=0;
}
void loop()
{
 for(int i = 0 ; i<20;i++)
 { 
 cur_time = millis();
 while(cur_time - time_elapsed <=time_period)
 { 
 if(mx==0)
 { mx = analogRead(A0); } 
 else:
 { data = analogread(A0);
 mx = max(data , mx); 
 }
 cur_time = millis();
 } 
 time_elapsed = cur_time;
 peaks[i] = mx;
 mx = 0; 
 }
 } 

Hope this helps!!