per-sensor calibration, indicator leds

drop.ino

@@ -1,49 +1,43 @@
-#include <Arduino.h>
-#include "helpers.hpp"
 #include "config.hpp"
 
+/// a connected pot
 typedef struct {
-  PotConfig &config;
-  
+  PotConfig *config;
+
   unsigned long last_watering;
   // anything changing per pot goes here
 } Pot;
 
-Pot pots[length(POT_CONFIGS)];
+/// all connected pots
+Pot pots[POT_COUNT];
 
 void setup() {
   Serial.begin(9600);
 
-  pinMode(6, OUTPUT);  //Enable
-  pinMode(5, OUTPUT);  //Puls
-  pinMode(13, OUTPUT); //Status LED
-  pinMode(4, OUTPUT);  //Enable6 halten
-  pinMode(2, OUTPUT);  //Puls5-
-  pinMode(3, OUTPUT);  //Direction4-
-
-  // link pots to their config
-  for (unsigned int i = 0; i < length(pots); i++) {
-    pots[i].config = POT_CONFIGS[i];
-
-    // TODO maybe set pinMode for valve and sensor pins?
-  }
+  pinMode(PUMP_LED_PIN, OUTPUT);
+  pinMode(PUMP_PIN, OUTPUT);
 }
 
 void loop() {
-  for (unsigned int i = 0; i < length(pots); i++) {
+  Serial.println("LOOP");
+
+  for (unsigned int i = 0; i < POT_COUNT; i++) {
+    Serial.print("Pot ");
+    Serial.println(i);
     per_pot(pots[i]);
   }
-  
+
+  Serial.println("");
   delay(LOOP_DELAY_MS);
 }
 
 void per_pot(Pot &pot) {
-  Serial.println(pot.config.name);
+  int percentage = get_humidity(pot.config->sensor);
+  if (percentage < 0) {
+    Serial.println(F("sensor not connected"));
+    return;
+  }
 
-  int sensorVal = analogRead(pot.config.sensor_pin);
-  int percentage = humidity_percentage(sensorVal);
-  Serial.print(sensorVal);
-  Serial.print(F(" -> "));
   Serial.print(percentage);
   Serial.println(F("%"));
 
@@ -54,7 +48,7 @@ void per_pot(Pot &pot) {
   } else if (percentage < MIN_HUMIDITY_PERCENT) {
     Serial.println(F("too dry -> watering"));
     water_pot(pot);
-  } else if (pot.last_watering + MAX_WATERING_INTERVAL_MS < millis()){
+  } else if (pot.last_watering + MAX_WATERING_INTERVAL_MS < millis()) {
     Serial.println(F("not been watered for a long time -> watering"));
     water_pot(pot);
   } else {
@@ -63,37 +57,45 @@ void per_pot(Pot &pot) {
 }
 
 void water_pot(Pot &pot) {
-  open_valve(pot.config.valve_pin);
-  start_pump();
+  digitalWrite(pot.config->led_pin, HIGH);
+
+  set_valve(pot.config->valve_pin, HIGH);
+  set_pump(HIGH);
+
   delay(WATER_TIME_MS);
-  stop_pump();
-  close_valve(pot.config.valve_pin);
   pot.last_watering = millis();
+
+  set_pump(LOW);
+  set_valve(pot.config->valve_pin, LOW);
+
+  digitalWrite(pot.config->led_pin, LOW);
 }
 
-int humidity_percentage(int sensorValue) {
-  // Sensor has a range of 236 to 520
+/// get humidity sensor value as a percentage
+int get_humidity(Sensor &sensor) {
+  // take average of multiple measurements
+  int sensorVal {0};
+  for (unsigned int i = 0; i < MEASUREMENT_COUNT; i++) {
+    sensorVal += analogRead(sensor.pin);
+    Serial.println(sensorVal);
+    delay(MEASUREMENT_DELAY);
+  }
+
+  sensorVal /= MEASUREMENT_COUNT;  
+
+  // Sensor has a range of e.g. 236 to 520
   // We want to translate this to a scale or 0% to 100%
   // More info: https://www.arduino.cc/reference/en/language/functions/math/map/
-  return map(sensorValue, SENSOR_CALIBRATION_WET, SENSOR_CALIBRATION_DRY, 100, 0);
+  return map(sensorVal, sensor.calibration_wet, sensor.calibration_dry, 100, 0);
 }
 
-void start_pump() {
-  // TODO start pump
+void set_pump(uint8_t state) {
+  digitalWrite(PUMP_LED_PIN, state);
+  digitalWrite(PUMP_PIN, state);
   delay(PUMP_DELAY_MS);
 }
 
-void stop_pump() {
-  // TODO stop pump
-  delay(PUMP_DELAY_MS);
-}
-
-void open_valve(int valve) {
-  // TODO open valve
-  delay(VALVE_DELAY_MS);
-}
-
-void close_valve(int valve) {
-  // TODO close valve
+void set_valve(uint8_t valve, uint8_t state) {
+  digitalWrite(valve, state);
   delay(VALVE_DELAY_MS);
 }