firmware WIP

Arduino/CanGrow/CanGrow.ino

@@ -1,19 +1,6 @@
 /*
  * CanGrow - simply DIY automatic plant grow system (for cannabis).
  * 
- * Pin assignment
- * ==============
- * 
- * D0      - MOSFET Fan
- * D1, D2  - I2C
- * D3      - DHT11
- * D5      - MOSFET Pump
- * D6      - MOSFET Grow LED, PWM
- * D7      - waterlevel (set HIGH to read value)
- * D8      - analog soil moisture (set HIGH to read value) 
- * A0      - analog input for soil moisture and waterlevel readings
- * 
- * D4 and D7 cannot be HIGH at the same time!
  */
 
 /*
@@ -39,11 +26,6 @@
  * 
  */
 
-// When D4 is LOW at start, WIPE is true and EEPROM get cleared
-// D4 hast to be shorted to GND withing the 2 sec delay in setup();
-// DO NOT PULL D4 DOWN AT START/POWER ON !!! BOOT WILL FAIL
-bool WIPE;
-
 // valSoilmoisture - contains the value of getSoilmoisture()
 byte valSoilmoisture;
 // valTemperature - contains the value of getTemperature()
@@ -63,8 +45,14 @@ float valHumidity;
 bool configured;
 char WIFIssid[32];
 char WIFIpassword[64];
+IPAddress WIFIip(192,168,4,20);
+IPAddress WIFInetmask(255,255,255,0);
+IPAddress WIFIgateway(192,168,4,254);
 
+// GrowName - contains the name of the grow/plant. Up to 32 byte
+char GrowName[32];
 // GrowStart - contains unix timestamp from date where grow starts (00:00)
+// unsigned long is 4 byte
 unsigned long GrowStart;
 // DayOfGrow contains on which day the grow is
 byte DayOfGrow;
@@ -76,8 +64,7 @@ byte DaysBloom;
 byte LighthoursVeg;
 // LighthoursBloom - contains how many hours the Growlight is on in Bloom
 byte LighthoursBloom;
-// GrowName - contains the name of the grow/plant. Up to 32 byte
+
-char GrowName[32];
 // Sunrise - contains to which hour of day the growlight turns on
 byte Sunrise;
 // PINled_PWM - contains the PWM value for dimming the grow light
@@ -89,7 +76,7 @@ byte MoistureSensor_Type;
 // UsePump - is the pump used? bool
 bool UsePump;
 // UseFan - is the fan used? bool
-bool UseFan
+bool UseFan;
 // SoilmoistureLow - contains the value , when soil moisture is assumed to be low, 
 byte SoilmoistureLow;
 
@@ -107,11 +94,6 @@ byte SoilmoistureLow;
 const char *APssid = "CanGrow-unconfigured";
 const char *APpass = "CanGrow";
 
-IPAddress WIFIip(192,168,4,20);
-IPAddress WIFInetmask(255,255,255,0);
-IPAddress WIFIgateway(192,168,4,254);
-
-
 
 /*
  * 
@@ -137,8 +119,20 @@ const char HTMLfooter[] PROGMEM = R"EOF(
 )EOF";
 
 /*
+ * 
  * Pin assignments
  * 
+ * D0      - MOSFET Fan
+ * D1, D2  - I2C
+ * D3      - DHT11
+ * D4      - PIN_WIPE
+ * D5      - MOSFET Pump
+ * D6      - MOSFET Grow LED, PWM
+ * D7      - waterlevel (set HIGH to read value)
+ * D8      - analog soil moisture (set HIGH to read value) 
+ * A0      - analog input for soil moisture and waterlevel readings
+ * 
+ * D4 and D7 cannot be HIGH at the same time!
  */
  
 // D0 is HIGH at boot, no PWM
@@ -146,7 +140,8 @@ const uint8_t PINfan = D0;
 // If D3 is pulled to LOW, boot fails
 const uint8_t PINdht = D3;
 // D4 is HIGH at boot, boot fail if pulled to LOW
-// PIN_WIPE set to HIGH at start erases the EEPROM saved data
+// During Start Screen you can pull D4 to LOW to wipe saved data in EEPROM
+// DO NOT PULL D4 DOWN AT WHEN POWERING ON !!! BOOT WILL FAIL
 const uint8_t PIN_WIPE = D4;
 const uint8_t PINpump = D5;
 const uint8_t PINled = D6; //
@@ -332,12 +327,12 @@ float getHumidity() {
   return humidity;
 }
 
-int getSoilmoisture(bool moistureSensor) {
+int getSoilmoisture(byte moistureSensor) {
   /*
    * moistureSensor
    * ==============
-   * 0/false : analog capacitive moisture sensor
+   * 0 : analog capacitive moisture sensor
-   * 1/true  : chirp I2C moisture sensor
+   * 1 : chirp I2C moisture sensor
    */
    
   // value to return
@@ -347,7 +342,7 @@ int getSoilmoisture(bool moistureSensor) {
   // value for dry
   int dry;
 
-  if(moistureSensor == false ) {
+  if(moistureSensor == 0 ) {
     // read analog value from analog moisture sensor
     wet = 180;
     dry= 590;
@@ -380,6 +375,19 @@ int getLightchirp() {
 
 
 void wipeEEPROM() {
+  
+  // i is helper variable. We reuse it later here again.
+  byte i = 0;
+  while(digitalRead(PIN_WIPE) == LOW ) {
+    // only show the Serial message once
+    if(i == 0) {
+      Serial.println("Please release PIN_WIPE to erase all data saved in EEPROM");
+      Serial.println("LAST CHANCE TO KEEP THE DATA WHEN RESETTING NOW!!");
+    }
+    // increase i to show the serial message only once
+    i = 1;
+  }
+  
   // write a 0 to all 512 bytes of the EEPROM
   Serial.print("wiping EEPROM... ");
   for (int i = 0; i < 512; i++) { EEPROM.write(i, 0); }
@@ -395,7 +403,7 @@ void wipeEEPROM() {
     
   Serial.println("!! Device will restart in 5 seconds !!");
   
-  byte i = 0;
+  i = 0;
   while( i <= 10 ) {
     if( i % 2 ) {
       digitalWrite(PIN_WIPE, LOW);
@@ -411,6 +419,17 @@ void wipeEEPROM() {
 
 bool loadEEPROM() {
   
+  /*
+   * configured
+   * 
+   * read var configured from address 511 - I put this to the end to
+   * prevent confusion with the 1 byte offset in the address when it
+   * would be at the beginning - more a cosmetic thing
+   */
+  EEPROM.get(511, configured);
+  
+  // when configured is > 1 (it should == 1) then read EEPROM furher data
+  if(configured > 0) {
     /*
      * WIFI data
      */
@@ -434,14 +453,7 @@ bool loadEEPROM() {
     
     //TBD
     
-  /*
+  
-   * configured
-   * 
-   * read var configured from address 511 - I put this to the end to
-   * prevent confusion with the 1 byte offset in the address when it
-   * would be at the beginning - more a cosmetic thing
-   */
-  EEPROM.get(511, configured);
     
     // print values to Serial output
     Serial.println(":: EEPROM loaded ::");
@@ -449,12 +461,13 @@ bool loadEEPROM() {
     Serial.println(WIFIssid);
     Serial.print("WIFIpassword: ");
     Serial.println(WIFIpassword);    
+  }
+
 
   Serial.print("configured: ");
   Serial.println(configured);
   
   return(configured);
-
 }
 
 
@@ -512,59 +525,85 @@ void setup() {
   // initialise DHT11
   dht.begin(); //TODO: Do only, when configured
 
-  WiFi.softAPConfig(WIFIip, WIFIgateway, WIFInetmask);
+  Serial.println("To wipe the EEPROM saved data, set D4 (PIN_WIPE) to LOW - NOW! (2 seconds left)");
-  WiFi.softAP(APssid);
-  Serial.print("AP IP address: ");
-  Serial.println(WiFi.softAPIP());
-  
-
-  
   // wait a few seconds to let the user pull D4 down to wipe EEPROM
   // and we can enjoy the boot screen meanwhile :p
   delay(2000);
 
   // read status from PIN_WIPE to WIPE
-  WIPE = digitalRead(PIN_WIPE);
+  
   
   // when PIN_WIPE is set to LOW, wipe EEPROM
-  if( WIPE == 0 ) {
+  if(digitalRead(PIN_WIPE) == LOW) {
     Serial.print("PIN_WIPE (D4) is set to LOW, wiping EEPROM now..");
-  
     // wipe EEPROM
     wipeEEPROM();
-  } else {
-    // load stored values from EEPROM
-    loadEEPROM();  
-    
   }
   
+  /*
+   * load EEPROM and Setup WiFi
+   * 
+   * call loadEEPROM() which returns a bool
+   * When true, CanGrow is already configured and EEPROM values are applied
+   * When false, CanGrow is unconfigured and we need to run the setup assistant
+   */
    
    
+  // load stored values from EEPROM
+  if(loadEEPROM()) {
+    Serial.print("Configuration found in EEPROM, connect to Wifi ");
+    Serial.println(WIFIssid);
+
+    // Start WiFi connection
+    WiFi.begin(WIFIssid, WIFIpassword);
+
+    // wait until WiFi connection is established
+    while (WiFi.status() != WL_CONNECTED) {
+      delay(500);
+      Serial.print(".");
+    }
+    Serial.println(" CONNECTED!");
+    Serial.print("IP: ");
+    Serial.println(WiFi.localIP());
+    
+    // use webhandlers for configured state
+    WebHandler_configured();
+  
+  // no data found in EEPROM, setup Access Point
+  } else {
+    Serial.println("Creating Accesspoint");
+    Serial.print("SSID: ");
+    Serial.println(APssid);
+    Serial.print("Password: ");
+    Serial.println(APpass);
+    
+    // configure WiFi Access Point
+    WiFi.softAPConfig(WIFIip, WIFIgateway, WIFInetmask);
+    // start Access Point
+    WiFi.softAP(APssid, APpass);
+    Serial.print("CanGrow IP address: ");
+    Serial.println(WiFi.softAPIP());
+    
+    // use webhandlers for unconfigured state
+    WebHandler_unconfigured();
+  }
   
   /* 
    * Webserver handlers
+   * here are the generic webserver handlers like 404 not found
+   * wificonfig save, ...
+   * 
+   * if you are looking for the single webpages handler, have a look to
+   * 
+   * WebHandler_unconfigured() and WebHandler_configured()
    */
   
-  // when not configured, webroot is WEBrootAP
-  // nothing else configured
-  if(configured == 0) {
-    webserver.on("/", HTTP_GET, WEBrootAP);
-  } else {
-    webserver.on("/", HTTP_GET, WEBroot);
-  }
-  
   // generic handler 
   webserver.on("/wifiConfig/save", HTTP_POST, POSTwifiConfig);
   // 404 handling
-  //webserver.onNotFound(handleNotFound);
+  webserver.onNotFound(WEB404);
-
-  /*
-  webserver.on("/", HTTP_GET, WEBroot);
-  
-  webserver.on("/control", HTTP_GET, handleControl);
-  */
-  
 
+  // start webserver
   webserver.begin();  
   
 }
@@ -582,6 +621,14 @@ void loop() {
   webserver.handleClient();
   }
 
+void WebHandler_unconfigured() {
+  webserver.on("/", HTTP_GET, WEBrootAP);
+}
+
+void WebHandler_configured() {
+  webserver.on("/", HTTP_GET, WEBroot);
+}
+  
 /*
  * 
  * Web pages
@@ -616,6 +663,12 @@ void WEBrootAP() {
 }    
   
 
+void WEB404() {
+  String body = FPSTR(HTMLheader);
+  body += "404 - not found";
+  body += FPSTR(HTMLfooter);
+}
+  
 /*
  * 
  * POSTs