add Calibrate whit persistent values

examples/HX711_Calibrado/HX711_Calibrado.ino

@@ -0,0 +1,140 @@
+//
+//    FILE: calibrado_hx711.ino
+//  AUTHOR: Felix Moli Grao
+// PURPOSE: HX711 demo
+//     URL: https://github.com/albalate/hxt11_2022
+#include "arduino.h"
+#include "HX711.h"
+#include <EEPROM.h>
+int eeAddress = 0;
+#define EEPROM_SIZE 100
+
+HX711 balanza;
+
+#ifdef ESP32
+byte buttonTare = 15;     // conect to gnd for tare 4
+byte buttonCalibrate = 2; // conect to gnd for calibrate 5
+byte ver = 0;             // conect to gnd for send state to serial 5
+uint8_t Data = 19;        //for esp32
+uint8_t Clock = 18;       //for esp32
+#else
+byte buttonTare = 3;      // conect to gnd for tare
+byte buttonCalibrate = 2; // conect to gnd for for calibrate
+byte ver = 4;             // conect to gnd for for send state to serial
+uint8_t Data = 6;
+uint8_t Clock = 7;
+#endif
+
+struct Bascula
+{
+    float scala;
+    long offSet;
+};
+
+Bascula bascula;
+
+void SaveStruct(int eeAddress, Bascula bascula)
+{
+    EEPROM.put(eeAddress, bascula);
+#ifdef ESP32
+    EEPROM.commit();
+#endif
+    Serial.println("Save custom object to EEPROM: ");
+    Serial.print("guardando scala: ");
+    Serial.println(bascula.scala);
+    Serial.print("guardando offset: ");
+    Serial.println(bascula.offSet);
+    delay(8000);
+}
+
+Bascula LoadStruct(int eeAddress)
+{
+    EEPROM.get(eeAddress, bascula);
+    Serial.println("Read custom object from EEPROM: ");
+    Serial.print("Cargando scale: ");
+    Serial.println(bascula.scala);
+    Serial.print("cargando offset: ");
+    Serial.println(bascula.offSet);
+    delay(8000);
+    return bascula;
+}
+
+void calibrate()
+{
+    Serial.println("\nclean the scale, press a key to continue");
+    while (!Serial.available());
+    while (Serial.available())  Serial.read();
+    balanza.set_scale();
+    balanza.tare();
+    Serial.println("\nPut 1000 gr in scale, press a key to continue");
+    while (!Serial.available());
+    while (Serial.available()) Serial.read();
+    balanza.set_scale(balanza.get_units(15) / 1000);
+    balanza.set_offset(balanza.get_value(15));
+    Serial.println("\nScale is calibrated,clean the scale Scale is calibrated, press a key to continue");
+    balanza.tare(15);
+
+    bascula.scala = balanza.get_scale();
+    bascula.offSet = balanza.get_offset();
+    SaveStruct(0, bascula); //Save to eeprom
+}
+void setup()
+{
+    Serial.begin(115200);
+    balanza.begin(Data, Clock);
+#ifdef ESP32
+    if (!EEPROM.begin(1000))
+    {
+        Serial.println("Failed to initialise EEPROM");
+        Serial.println("Restarting...");
+        delay(1000);
+        ESP.restart();
+    }
+#endif
+
+    bascula = LoadStruct(0); //load off eeprom
+    balanza.set_scale(bascula.scala);
+    balanza.set_offset(bascula.offSet);
+    Serial.println("Iniciando Scala:  " + String(balanza.get_scale()));
+    Serial.println("Iniciando Offset:  " + String(balanza.get_offset()));
+    if ((bascula.scala == 0.00) || (bascula.offSet == 0))
+    {
+        calibrate();
+    }
+    else
+    {
+        Serial.println("poniendo tara");
+        balanza.tare(25);
+    }
+    pinMode(buttonTare, INPUT_PULLUP);
+    pinMode(buttonCalibrate, INPUT_PULLUP);
+    pinMode(ver, INPUT_PULLUP);
+}
+
+void loop()
+{
+    if (digitalRead(buttonTare) == false)
+    {
+
+        Serial.println("Scala:  " + String(balanza.get_scale()));
+        Serial.println("Offset:  " + String(balanza.get_offset()));
+        delay(2000);
+        balanza.tare(25);
+    }
+
+    if (digitalRead(buttonCalibrate) == false)
+    {
+        calibrate();
+        delay(500);
+    }
+
+    if (digitalRead(ver) == false)
+    {
+        LoadStruct(0);
+        delay(2500);
+    }
+
+    Serial.print("UNITS: ");
+    Serial.println(balanza.get_units(15));
+    delay(250);
+}