add error messages, timeout tare

CG_scale.ino

@@ -4,7 +4,7 @@
                       (c) 2019 by M. Lehmann
   ------------------------------------------------------------------
 */
-#define CGSCALE_VERSION "1.0.51"
+#define CGSCALE_VERSION "1.0.55"
 /*
 
   ******************************************************************
@@ -180,6 +180,8 @@ unsigned long lastTimeMenu = 0;
 unsigned long lastTimeLoadcell = 0;
 bool updateMenu = true;
 int menuPage = 0;
+String errMsg[5] = "";
+int errMsgCnt = 0;
 
 
 // Restart CPU
@@ -414,12 +416,35 @@ void setup() {
   }
 
   // tare
+  byte loadcell_1_rdy = 0;
+  byte loadcell_2_rdy = 0;
+  byte loadcell_3_rdy = 0;
+  lastTimeLoadcell = millis();
+
+  while ((loadcell_1_rdy + loadcell_2_rdy + loadcell_3_rdy) < 3) {
+    loadcell_1_rdy = LoadCell_1.startMultiple(STABILISINGTIME);
+    loadcell_2_rdy = LoadCell_2.startMultiple(STABILISINGTIME);
     if (nLoadcells > 2) {
-    while (!LoadCell_1.startMultiple(STABILISINGTIME) && !LoadCell_2.startMultiple(STABILISINGTIME) && !LoadCell_3.startMultiple(STABILISINGTIME)) {
+      loadcell_3_rdy = LoadCell_3.startMultiple(STABILISINGTIME);
-    }
     } else {
-    while (!LoadCell_1.startMultiple(STABILISINGTIME) && !LoadCell_2.startMultiple(STABILISINGTIME)) {
+      loadcell_3_rdy = 1;
     }
+    // timeout
+    if ((millis() - lastTimeLoadcell) > TARE_TIMEOUT) {
+      errMsg[++errMsgCnt] = "ERROR: Timeout TARE\n";
+      break;
+    }
+  }
+
+  // check loadcells if error
+  if (!loadcell_1_rdy) {
+    errMsg[++errMsgCnt] = "ERROR: Loadcell 1 not ready\n";
+  }
+  if (!loadcell_2_rdy) {
+    errMsg[++errMsgCnt] = "ERROR: Loadcell 2 not ready\n";
+  }
+  if (!loadcell_3_rdy) {
+    errMsg[++errMsgCnt] = "ERROR: Loadcell 3 not ready\n";
   }
 
   // set calibration factor
@@ -495,7 +520,7 @@ void loop() {
       if (nLoadcells > 2) {
         CG_trans = (distanceX3 / 2) - (((weightLoadCell1 + weightLoadCell2 / 2) * distanceX3) / weightTotal);
       }
-    }else{
+    } else {
       CG_length = 0;
       CG_trans = 0;
     }
@@ -521,6 +546,7 @@ void loop() {
 
     oledDisplay.firstPage();
     do {
+      if (errMsgCnt == 0) {
         // print battery
         if (enableBatVolt) {
           oledDisplay.drawXBMP(88, 1, 12, 6, batteryImage);
@@ -554,6 +580,13 @@ void loop() {
           oledDisplay.print(buff);
           oledDisplay.print(F(" mm"));
         }
+      } else {
+        oledDisplay.setFont(u8g2_font_5x7_tr);
+        for (int i = 1; i <= errMsgCnt; i++) {
+          oledDisplay.setCursor(0, 7 * i);
+          oledDisplay.print(errMsg[i]);
+        }
+      }
 
     } while ( oledDisplay.nextPage() );
 
@@ -713,6 +746,9 @@ void loop() {
             Serial.print(F("disabled)\n"));
           }
           Serial.print(F("14 - Show actual values\n15 - Reset to factory defaults\n\n"));
+          for (int i = 1; i <= errMsgCnt; i++) {
+            Serial.print(errMsg[i]);
+          }
           Serial.print(F("Please choose the menu number:"));
           updateMenu = false;
           break;
@@ -875,7 +911,7 @@ void main_page()
   webPage += "<br><br><br>";
   webPage += "<main role=\"main\" class=\"container\">";
   webPage += "<div class=\"jumbotron\">";
-
+  if (errMsgCnt == 0) {
     // print weight
     webPage += "<div class=\"container\">";
     webPage += "<div class=\"row mt-3\">";
@@ -900,7 +936,6 @@ void main_page()
 
     // print cg trans
     if (nLoadcells > 2) {
-    //webPage += "<br>";
       webPage += "<div class=\"container\">";
       webPage += "<div class=\"row mt-3\">";
       webPage += "<div class=\"col-xs-6\"><img src=\"cglr.png\" class=\"pull-left mr-4\" alt=\"weight\" style=\"width:auto;height:50px\"></div>";
@@ -915,7 +950,6 @@ void main_page()
 
     // print battery
     if (enableBatVolt) {
-    //webPage += "<br>";
       webPage += "<div class=\"container\">";
       webPage += "<div class=\"row mt-3\">";
       webPage += "<div class=\"col-xs-6\"><img src=\"battery.png\" class=\"pull-left mr-4\" alt=\"weight\" style=\"width:auto;height:50px\"></div>";
@@ -925,6 +959,14 @@ void main_page()
       webPage += "</div>";
       webPage += "</div>";
     }
+  } else {
+    webPage += "<div class=\"container\">";
+    webPage += "<font size=\"6\"> ";
+    for (int i = 1; i <= errMsgCnt; i++) {
+      webPage += errMsg[i];
+    }
+    webPage += "</div>";
+  }
   webPage += "</div>";
   webPage += "</main>";
   webPage += "<p><font size=\"2\"><center>(c) 2019 M. Lehmann - Version: ";

settings_AVR.h

@@ -59,6 +59,7 @@ CG scale with 3 Loadcells:
 // **** Measurement settings ****
 
 #define STABILISINGTIME               3000     // ms
+#define TARE_TIMEOUT                  4000     // ms
 
 #define UPDATE_INTERVAL_OLED_MENU     500      // ms
 #define UPDATE_INTERVAL_LOADCELL      100      // ms

settings_ESP8266.h

@@ -59,6 +59,7 @@ CG scale with 3 Loadcells:
 // **** Measurement settings ****
 
 #define STABILISINGTIME               3000     // ms
+#define TARE_TIMEOUT                  4000     // ms
 
 #define UPDATE_INTERVAL_OLED_MENU     500      // ms
 #define UPDATE_INTERVAL_LOADCELL      100      // ms
@@ -100,8 +101,8 @@ U8G2_SH1106_128X64_NONAME_1_HW_I2C oledDisplay(U8G2_R0, /* reset=*/ U8X8_PIN_NON
 #define V_REF                         3300     // set supply voltage from 1800 to 5500mV
 
 // voltage divider
-#define RESISTOR_R1                   10000    // ohm
+#define RESISTOR_R1                   20000    // ohm
-#define RESISTOR_R2                   20000    // ohm
+#define RESISTOR_R2                   10000    // ohm
 
 /*
                   voltage input