Code run at Ecofest 2017

GiantMeterCode/GiantMeterCode.ino

@@ -0,0 +1,82 @@
+int output_min=30;
+int output_max=150;
+
+int input_min=500;
+int input_max= 825;
+
+byte input_pin = A0;
+byte output_pin = 9;
+byte config_button_pin = 3;
+
+#define smoothing 30
+//int smoothing=30;
+int buffer[smoothing];
+int bufpos = 0;
+int autoconf_seconds = 20;
+
+void setup() {
+ pinMode(input_pin, INPUT);
+ pinMode(output_pin, OUTPUT);
+ digitalWrite(output_pin,0);
+
+ Serial.begin(9600);
+}
+
+void loop() {
+//  while(1){
+//    SweepTest();
+//  }
+ // AutoConfigure();
+  while(1) {
+    RunMeter();
+  }
+}
+
+void AutoConfigure() {
+  unsigned long start_time = millis();
+  int max_value = 0;
+  int min_value = 1023;
+  while (millis()-start_time < autoconf_seconds*1000)
+  {
+    int value = analogRead(input_pin);
+    if(value > max_value)
+      max_value = value;
+    if(value < min_value)
+      min_value = value;
+  }
+  input_min = min_value;
+  //input_max = max_value;
+}
+
+void RunMeter() {
+  int current_value = analogRead(input_pin);
+  int total = 0;
+  bufpos = (bufpos+1)%smoothing;
+  buffer[bufpos]= current_value;
+  for(int i=0; i<smoothing; i++) {
+    total += buffer[i];
+  }
+  int smoothed_value = total/smoothing;
+  analogWrite(output_pin, map(smoothed_value, input_min, input_max, output_min, output_max));
+  Serial.print(input_min);
+  Serial.print(", ");
+  Serial.print(current_value);
+  Serial.print(", ");
+  Serial.print(smoothed_value);
+  Serial.print(", ");
+  Serial.println(input_max);
+}
+
+void SweepTest() {
+    int output_current=0;
+    for(int pwm_current=output_min; output_current<output_max; output_current++)
+    {
+     analogWrite(9,output_current);
+     delay(50); 
+    }
+    for(int output_current=output_max; output_current>output_min; output_current--)
+    {
+     analogWrite(9,output_current);
+     delay(50); 
+    }
+}