fix signed unsigned warnings

platformio.ini

@@ -19,3 +19,4 @@ lib_deps=
     bogde/HX711@^0.7.5
     marcoschwartz/LiquidCrystal_I2C@^1.1.4
     https://github.com/arduino-libraries/Servo
+    https://github.com/emilv/ArduinoSort/

src/main.cpp

@@ -6,6 +6,7 @@
 #include <EEPROM.h>
 #include <Wire.h> 
 #include <LiquidCrystal_I2C.h>
+#include <ArduinoSort.h>
 
 #define EEPROMVERSION 1
 
@@ -82,10 +83,10 @@ String receivedString ="";
 
 char tempstring[16]; //for dtostrf
 
-long time_lastlcd=0;
+unsigned long time_lastlcd=0;
-long looptimelcd_margin=0; //if >0 loop took longer than expected
+unsigned long looptimelcd_margin=0; //if >0 loop took longer than expected
 uint8_t fps=DEFAULT_FPS; //EEPROM
-long time_lcdwait=1000/fps;
+unsigned long time_lcdwait=1000/fps;
 String lcd0=""; //lcd line 0
 String lcd1=""; // "       1
 #define LCD_BACKLIGHT_TIME 20000
@@ -96,17 +97,18 @@ uint32_t lcd_backlight_offtimer=0;
 String lcd0_buffer="";
 String lcd1_buffer="";
 
-long time_lastadc=0;
+unsigned long time_lastadc=0;
-long looptimeadc_margin=0;
+unsigned long looptimeadc_margin=0;
 uint8_t spsadc=DEFAULT_SPSADC; //eeprom
-long time_adcwait=1000/spsadc;
+unsigned long time_adcwait=1000/spsadc;
 int adc_readings=1; //ca. 700ms for 5 readings, ca 75ms for 1 reading, readings=1 10times = 747ms
 
 double weight=0;
 #define ADCMEDIANVALUES_MAX 31 //needs to be uneven, maximum number, for array declaration
-double weightseries[ADCMEDIANVALUES_MAX]; //last n values for median filter
+float weightseries[ADCMEDIANVALUES_MAX]; //last n values for median filter
-int adcmedianvalues=DEFAULT_ADCMEDIANVALUES; //needs to be uneven //eeprom
+uint16_t adcmedianvalues=DEFAULT_ADCMEDIANVALUES; //needs to be uneven //eeprom
-int adcmedianposition=0;
+float adcFilterKeepMedianvaluesFactor=0.8; //how many lowest and highest values will be removed from the array before avaraging (as factor). 0.0 means only median is used. 1.0 means all values are used.
+uint16_t adcmedianposition=0;
 
 float calibrationWeight=100; //gramms
 
@@ -170,11 +172,12 @@ String toString(double w,uint8_t dec);
 String toString(double w);
 String toWeightString(double w,uint8_t dec,uint8_t len);
 String toWeightString(double w);
-double getWeightSeriesMax();
+float getWeightSeriesMax();
-double getWeightSeriesMin();
+float getWeightSeriesMin();
 double getWeightMedian();
-double getVoltage();
+double getWeightFiltered();
-double getCurrent();
+float getVoltage();
+float getCurrent();
 String menuentry_string();
 void menuentry_set(uint8_t presstype);
 void menuentry_back(uint8_t presstype);
@@ -311,7 +314,8 @@ void loop() {
     }
     lcd0=toStringBar(weight,0,1000);
     //lcd1=toWeightString(weight)+"g";
-    lcd1=toWeightString(getWeightMedian())+"g";
+    //lcd1=toWeightString(getWeightMedian())+"g";
+    lcd1=toWeightString(getWeightFiltered())+"g";
     
     //___
     if (btn_back_press==2){ //press BACK to tare
@@ -883,7 +887,7 @@ String menuentry_string(){ //second line string if entry selected
   return s;
 }
 
-double getCurrent()
+float getCurrent()
 {
   uint16_t _current=0;
   for (uint8_t i=0;i<N_CURRENTREADINGS;i++){
@@ -893,7 +897,7 @@ double getCurrent()
   return _current*CURRENTMULTIPLIER+0.00001;
 }
 
-double getVoltage()
+float getVoltage()
 {
   return analogRead(PIN_VOLTAGE)*VOLTAGEMULTIPLIER+0.00001;
 }
@@ -901,14 +905,14 @@ double getVoltage()
 double getWeightMedian() //return median weight from weightseries
 {
   boolean mask[adcmedianvalues]; //true=disabled value
-  for (int i=0;i<adcmedianvalues;i++)
+  for (uint16_t i=0;i<adcmedianvalues;i++)
     mask[i]=false;
-  double cmin=MAXDOUBLEVALUE; int cmin_i=0;
+  float cmin=MAXDOUBLEVALUE; uint16_t cmin_i=0;
-  double cmax=0; int cmax_i=0;
+  float cmax=0; uint16_t cmax_i=0;
   while(cmin!=cmax){ //stop when only one value left
     cmin=MAXDOUBLEVALUE;
     cmax=-MAXDOUBLEVALUE-1;
-    for (int i=0;i<adcmedianvalues;i++){
+    for (uint16_t i=0;i<adcmedianvalues;i++){
       if (!mask[i]){
         if (weightseries[i]<cmin){
           cmin=weightseries[i];
@@ -927,19 +931,64 @@ double getWeightMedian() //return median weight from weightseries
   return cmax;
 }
 
-double getWeightSeriesMin()
+double getWeightFiltered() {
+  boolean mask[adcmedianvalues]; //true=disabled value
+  for (uint16_t i=0;i<adcmedianvalues;i++)
+    mask[i]=false;
+  float cmin=MAXDOUBLEVALUE; uint16_t cmin_i=0;
+  float cmax=0; uint16_t cmax_i=0;
+  //while(cmin!=cmax){ //stop when only one value left
+  uint16_t _valuesLeft=adcmedianvalues;
+
+
+  while (_valuesLeft>2 && _valuesLeft>(uint16_t)(adcmedianvalues*adcFilterKeepMedianvaluesFactor)) 
+  {
+    cmin=MAXDOUBLEVALUE;
+    cmax=-MAXDOUBLEVALUE-1;
+    for (uint16_t i=0;i<adcmedianvalues;i++){
+      if (!mask[i]){
+        if (weightseries[i]<cmin){
+          cmin=weightseries[i];
+          cmin_i=i;
+        }
+        if (weightseries[i]>cmax){
+          cmax=weightseries[i];
+          cmax_i=i;
+        }
+      }
+      
+    }
+    mask[cmin_i]=true;
+    mask[cmax_i]=true;
+    _valuesLeft-=2; //2 values have been masked out
+  }
+
+
+
+  double sum=0;
+  uint16_t meanvalues=0;
+  for (uint16_t i=0;i<adcmedianvalues;i++){
+    if (!mask[i]) { //not masked out
+      sum+=weightseries[i];
+      meanvalues++;
+    }
+  }
+  return sum/meanvalues;
+}
+
+float getWeightSeriesMin()
 {
-  double cmin=MAXDOUBLEVALUE;
+  float cmin=MAXDOUBLEVALUE;
-  for (int i=0;i<adcmedianvalues;i++){
+  for (uint16_t i=0;i<adcmedianvalues;i++){
     if (weightseries[i]<cmin)
      cmin=weightseries[i]; 
   }
   return cmin;
 }
-double getWeightSeriesMax()
+float getWeightSeriesMax()
 {
-  double cmax=0;
+  float cmax=0;
-  for (int i=0;i<adcmedianvalues;i++){
+  for (uint16_t i=0;i<adcmedianvalues;i++){
     if (weightseries[i]>cmax)
      cmax=weightseries[i]; 
   }
@@ -1087,7 +1136,7 @@ uint16_t EEPROMReadInt(uint8_t paddr){
 void EEPROMWriteDouble(int ee, double value)
 {
    byte* p = (byte*)(void*)&value;
-   for (int i = 0; i < sizeof(value); i++)
+   for (uint16_t i = 0; i < sizeof(value); i++)
        EEPROM.write(ee++, *p++);
 }
 
@@ -1095,7 +1144,7 @@ double EEPROMReadDouble(int ee)
 {
    double value = 0.0;
    byte* p = (byte*)(void*)&value;
-   for (int i = 0; i < sizeof(value); i++)
+   for (uint16_t i = 0; i < sizeof(value); i++)
        *p++ = EEPROM.read(ee++);
    return value;
 }