From 0848a13c38d2f54c91a1e98e114fd49e3f4c8a70 Mon Sep 17 00:00:00 2001
From: Steven <steven.vasilogianis@gmail.com>
Date: Tue, 5 Oct 2021 13:46:14 -0400
Subject: Add photoresistor support

---
 src/main/main.ino | 44 +++++++++++++++++++++++++++++++++-----------
 1 file changed, 33 insertions(+), 11 deletions(-)

diff --git a/src/main/main.ino b/src/main/main.ino
index 1027bed..a435473 100644
--- a/src/main/main.ino
+++ b/src/main/main.ino
@@ -2,7 +2,9 @@
 #define HUMIDITY_SENSOR_PIN 12
 #define FAN_PIN 15
 #define CO2_PIN 16
-#define ULTRASONIC_PIN 17
+#define ULTRASONIC_PIN 12
+
+#define PHOTORESISTOR 0        // pin 0 is analog
 
 #define CHECK_FREQUENCY 2      // check sensors every 2 seconds
 #define HUMIDITY_DESIRED 75
@@ -11,30 +13,32 @@
 
 #include "ota.h"
 
-// Tempature + Humidity Sensor
 #include <WiFiClient.h>
+WiFiClient *wific = 0;
+
+// Tempature + Humidity Sensor
 #include <DHT.h>
 #define DHTPIN 12
 #define DHTTYPE DHT11
 DHT dht(DHTPIN, DHTTYPE);
 
-WiFiClient *wific = 0;
 
 void setup () {
-  setupWifi((char *) hostname);
-  setupOTA((char *) hostname);
-
   Serial.begin(115200);
   Serial.println(F("Mushing..."));
 
-  dht.begin();                  // temp+humidity sensor
+  setupWifi((char *) hostname);
+  setupOTA((char *) hostname);
+
+  dht.begin();                    // temp+humidity sensor
+  pinMode(PHOTORESISTOR, INPUT);  // photo resistor
   wific = new WiFiClient();
 }
 
-void log_reading ( float temp_c, float humidity, float heat_index_c ) {
-  auto fmt = "T: %.2f H: %.2f HI: %.2f\r\n";
+void log_reading ( float temp_c, float humidity, float heat_index_c, int photons ) {
+  auto fmt = "T: %.2f H: %.2f HI: %.2f LIGHT: %d\r\n";
   char buf[500];
-  snprintf(buf, sizeof(buf), fmt, temp_c, humidity, heat_index_c);
+  snprintf(buf, sizeof(buf), fmt, temp_c, humidity, heat_index_c, photons);
   //Serial.printf(fmt, temp_c, humidity, heat_index_c);
   Serial.print(buf);
   if (wific->connected()) {
@@ -42,6 +46,22 @@ void log_reading ( float temp_c, float humidity, float heat_index_c ) {
   }
 }
 
+/*
+Global state variables to hold rolling average humidity, temperature, etc sensor values
+Override state variable is set by network command
+
+Need max and min threshhold values for each sensor too
+
+struct SensorState
+{
+  float rolling_average;
+  float threshold_top;
+  float threshold_bottom;
+  void *top_exceeded_callback();
+  float force_value;
+}
+*/
+
 void loop() {
   ArduinoOTA.handle();
 
@@ -65,5 +85,7 @@ void loop() {
   }
   float hic = dht.computeHeatIndex(t, h, false);
 
-  log_reading(t, h, hic);
+  int photons = analogRead(PHOTORESISTOR);
+  log_reading(t, h, hic, photons);
 }
+
-- 
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