Adding explicit config option to enable/disable WiFi, USB-to-Serial and Serial printing. Printing measurements to Serial is now always on by default.

Firmware/src/config_winfidel.h

@@ -4,6 +4,17 @@
 #define MDNS_NAME       "winfidel"
 #define WIFI_HOSTNAME   "WInFiDEL by SK"
 
+#ifndef CONFIG_PRINT_MEASUREMENTS_USB_CDC
+#define CONFIG_PRINT_MEASUREMENTS_USB_CDC   1       // Set to `1` if we want serial (USB-to-Serial) printout for every measurement.
+#endif // CONFIG_PRINT_MEASUREMENTS_USB_CDC
+
+#ifndef CONFIG_PRINT_MEASUREMENTS_UART_GPIO
+#define CONFIG_PRINT_MEASUREMENTS_UART_GPIO 1       // Set to `1` if we want serial (TX GPIO) printout for every measurement.
+#endif // CONFIG_PRINT_MEASUREMENTS_UART_GPIO
+
+#ifndef CONFIG_ENABLE_WIFI
+#define CONFIG_ENABLE_WIFI                  1       // Set to `1` if we want to use WiFi (ie not requred for Serial only application)
+#endif
 
 #define CALIBRATION_POINT_SAMPLE_COUNT      32      // Number of ADC samples to take for new calibration point
 #define CALIBRATION_POINT_ACCURACY_POINT    50      // We expect all CALIBRATION_POINT_SAMPLE_COUNT samples to be
@@ -21,7 +32,6 @@
 #define CAL_POINT_FIRST                     { .adc = ADC_MIN, .mm = ADC_MIN_EQUALS_MM }
 #define CAL_POINT_LAST                      { .adc = ADC_MAX, .mm = ADC_MAX_EQUALS_MM }
 
-#define PRINT_MEASUREMENT_OVER_SERIAL               // Define if we want serial printout for every measurement
 
 #define ADC_MAX_SAMPLES                     64      // Maximum number of ADC samples we can take in one measurement cycle
 #define ADC_SAMPLES_PER_MEASUREMENT_CYCLE   16      // How many samples to take for each measurement cycle
@@ -87,4 +97,18 @@ typedef struct calibration
 } calibration_t;
 
 
+// Note during build that certain features have been disabled
+#if !CONFIG_ENABLE_WIFI
+    #pragma message "-- Note: WiFi is DISBLED in this build!"
+#endif
+
+#if !CONFIG_PRINT_MEASUREMENTS_USB_CDC
+    #pragma message "-- Note: Printing measurements over USB-CDC is DISABLED!"
+#endif
+
+#if !CONFIG_PRINT_MEASUREMENTS_UART_GPIO
+    #pragma message "-- Note: Printing measurements over SERIAL is DISABLED!"
+#endif
+
+
 #endif

Firmware/src/main.ino

@@ -7,17 +7,21 @@
 #include "include/PersistSettings.h"
 #include "config_winfidel.h"
 
+bool bStatusLED = false;
+
+#if CONFIG_ENABLE_WIFI
 WiFiManager wifiManager;
 AsyncWebServer server(80);
 volatile int WiFi_status = WL_IDLE_STATUS;
 const char mdnsName[] = MDNS_NAME;
 const char wifiName[] = WIFI_HOSTNAME;
 uint8_t dbgOTApercent = 100;
-bool bStatusLED = false;
-#ifdef PRINT_MEASUREMENT_OVER_SERIAL
+#endif //CONFIG_ENABLE_WIFI
+
+#if CONFIG_PRINT_MEASUREMENTS_USB_CDC
 int SerialInByte = 0;
 bool bSerialPrintoutRequested = false;
-#endif
+#endif // CONFIG_PRINT_MEASUREMENTS_USB_CDC
 
 void setup()
 {
@@ -31,16 +35,21 @@ void setup()
     LED_RED_ON();
 
     // Configure Serial communication
-	Serial.begin(115200);
-    Serial.println("Wireless Inline Filament Estimator, Low-Cost - WInFiDEL");
-    WiFi.setHostname(wifiName);
+	Serial.begin(115200);   // USB-to-UART
+    Serial0.begin(115200);  // TX/RX GPIOS
 
-    // wifiManager.resetSettings(); // Wipe WiFi settings. Uncomment for WiFi manager testing
+    Serial.println("Wireless Inline Filament Estimator, Low-Cost - WInFiDEL");
+    Serial0.println("Wireless Inline Filament Estimator, Low-Cost - WInFiDEL");
+
+#if CONFIG_ENABLE_WIFI
+    WiFi.setHostname(wifiName);
+#endif // CONFIG_ENABLE_WIFI
 
     delay(500);
 
     LED_GREEN_ON();
 
+#if CONFIG_ENABLE_WIFI
     bool res;
     res = wifiManager.autoConnect("SK-WInFiDEL-Setup");
 
@@ -67,12 +76,14 @@ void setup()
 
     // Add service to MDNS-SD
     MDNS.addService("http", "tcp", 80);
+#endif // CONFIG_ENABLE_WIFI
 
     EEPROM.begin(sizeof(calibration_t));
     calibration_init();
 
     adc_init();
 
+#if CONFIG_ENABLE_WIFI
     Serial.print("Starting WebServer...");
 	setupWebServer();
 	server.begin();
@@ -120,6 +131,7 @@ void setup()
     });
     ArduinoOTA.begin();
     Serial.println("Arduino OTA is on");
+#endif // CONFIG_ENABLE_WIFI
 
     // Debug message to signal we are initialized and entering loop
 	Serial.println("Ready to go.");
@@ -137,9 +149,12 @@ void setup()
 void loop()
 {
     Measurements_Tick();
-    ArduinoOTA.handle();
 
-#ifdef PRINT_MEASUREMENT_OVER_SERIAL
+#if CONFIG_ENABLE_WIFI
+    ArduinoOTA.handle();
+#endif // CONFIG_ENABLE_WIFI
+
+#ifdef CONFIG_PRINT_MEASUREMENTS_USB_CDC
     int available = Serial.available();
     if(available > 0)
     {
@@ -154,5 +169,5 @@ void loop()
             LED_SERIAL_OFF();
         }
     }
-#endif
+#endif // CONFIG_PRINT_MEASUREMENTS_USB_CDC
 }

Firmware/src/measurements.ino

@@ -116,7 +116,8 @@ void Measurements_Tick(void)
             LED_MEASUREMENT_ON();
         }
 
-        #ifdef PRINT_MEASUREMENT_OVER_SERIAL
+        // Measurement printing over USB-CDC
+        #ifdef CONFIG_PRINT_MEASUREMENTS_USB_CDC
         if (bSerialPrintoutRequested && (Serial.availableForWrite()>9))
         {
             Serial.print(">");
@@ -132,7 +133,15 @@ void Measurements_Tick(void)
                 LED_SERIAL_OFF();
             }
         }
-        #endif
+        #endif // CONFIG_PRINT_MEASUREMENTS_USB_CDC
+
+        // Measurement printing over Serial
+        #ifdef CONFIG_PRINT_MEASUREMENTS_UART_GPIO
+        Serial0.print(">");
+        Serial0.print(gReadingLast);
+        Serial0.print("mm\r\n");
+        #endif //CONFIG_PRINT_MEASUREMENTS_UART_GPIO
+
 
         // Set next update timestamp
         nNextMeasurementTick = millis() + 200;

Firmware/src/version.h

@@ -2,7 +2,7 @@
 #define __WINFIDEL_FW_VERSION_H__
 
 #define VERSION_MAJOR   2025
-#define VERSION_MINOR   2
-#define VERSION_PATCH   22
+#define VERSION_MINOR   10
+#define VERSION_PATCH   17
 
 #endif