Make sensor initialization and measurement more dynamic by checking

which one are declared in config.h

firmware/atmega/include/config.h

@@ -1,28 +1,23 @@
 #ifndef CONFIG_H
 #define CONFIG_H
 
-//#define VASE_NUM 0
-
 #define MOISTURE_SENSOR_A0 PC0
 #define MOISTURE_SENSOR_A1 PC1
 #define MOISTURE_SENSOR_A2 PC2
 #define MOISTURE_SENSOR_A3 PC3
 #define MOISTURE_SENSOR_A4 PC4
 #define MOISTURE_SENSOR_A5 PC5
-// NOTE: PC6 PC7 are not accessible by default on Arduino Uno R3
-// You need to use the ATMega328p on a custom PCB and use pins 1 and 2
 //#define MOISTURE_SENSOR_A6 PC6
 //#define MOISTURE_SENSOR_A7 PC7
 
-// You may just connect the pumps that actually are needed in the vase
-// or define only the connected pumps on your system
 #define PUMP_D3 PD3
 #define PUMP_D4 PD4
 #define PUMP_D5 PD5
-#define PUMP_D6 PD6
-#define PUMP_D7 PD7
+//#define PUMP_D6 PD6
+//#define PUMP_D7 PD7
 
+// TODO: write these to eeprom
 #define SENSOR_READINGS 5
-#define SENSORS_NUM 6
+//#define VASE_NUM 0
 
 #endif

firmware/atmega/include/moisture.h

@@ -3,12 +3,49 @@
 
 #include <stdint.h>
 #include <stdbool.h>
+#include "config.h"
+
+static const int8_t sensorPins[] = {
+    #ifdef MOISTURE_SENSOR_A0
+        MOISTURE_SENSOR_A0,
+    #endif
+
+    #ifdef MOISTURE_SENSOR_A1
+        MOISTURE_SENSOR_A1,
+    #endif
+
+    #ifdef MOISTURE_SENSOR_A2
+        MOISTURE_SENSOR_A2,
+    #endif
+
+    #ifdef MOISTURE_SENSOR_A3
+        MOISTURE_SENSOR_A3,
+    #endif
+
+    #ifdef MOISTURE_SENSOR_A4
+        MOISTURE_SENSOR_A4,
+    #endif
+
+    #ifdef MOISTURE_SENSOR_A5
+        MOISTURE_SENSOR_A5,
+    #endif
+
+    #ifdef MOISTURE_SENSOR_A6
+        MOISTURE_SENSOR_A6,
+    #endif
+
+    #ifdef MOISTURE_SENSOR_A7
+        MOISTURE_SENSOR_A7,
+    #endif
+    };
+
+#define SENSORS_NUM (sizeof(sensorPins) / sizeof(sensorPins[0]))
+
+extern volatile bool readSensors;
 
 void sensorsInit(void);
 void triggerMoistureRead(void);
 int16_t moistureAverage(int8_t sensorPin);
 int16_t moistureRead(void);
 
-extern volatile bool readSensors;
-
 #endif