From eaea6b5beadde062d06744935b5838807854ddfe Mon Sep 17 00:00:00 2001
From: Manuel Weiser <manuel.weiser@me.com>
Date: Mon, 21 May 2018 13:33:00 +0200
Subject: [PATCH] Wifi, Wage, Display, OTA fertig MQTT initial ToDo: MQTT send
 in Kanal, Verbindung zu Octoprint

---
 platformio.ini |   3 ++
 src/main.cpp   | 139 ++++++++++++++++++++++++++++++++++++++++++++++---
 2 files changed, 136 insertions(+), 6 deletions(-)

diff --git a/platformio.ini b/platformio.ini
index d026671..cf310a2 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -12,3 +12,6 @@
 platform = espressif8266
 board = esp12e
 framework = arduino
+
+upload_port = esp_filwage.local ;192.168.1.134
+upload_flags = --auth=***REMOVED***
diff --git a/src/main.cpp b/src/main.cpp
index aba06cf..f125ce2 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,17 +1,144 @@
 #include <Arduino.h>
+#include <ESP8266WiFi.h>
+#include <PubSubClient.h>
+#include <ArduinoOTA.h>
 #include <HX711.h>
+#include <SH1106Wire.h>
+#include <OLEDDisplayFonts.h>
+#include <EEPROM.h>
+
+extern "C" {
+  #include "user_interface.h"
+}
+
+const int buttonTare = D4;
+
+String esp_id = "filwage"; // ESP Name
+
+const char* ssid = "iApfel";
+const char* password = "***REMOVED***";
+const char* mqtt_server = "192.168.1.5";
+const char* ota_password = "***REMOVED***";
+
+String esp = "esp_" + String(esp_id);
+char* esp_name = &esp[0u];
+
+String print_topic = "esp_filwage";
+const char* mqtt_topic = &print_topic[0u];
+
+WiFiClient espClient;
+PubSubClient client(espClient);
+
+// Display Settings
+const int I2C_DISPLAY_ADDRESS = 0x3c;
+const int SDA_PIN = D6;
+const int SDC_PIN = D7;
+// change if your are using SSD1306
+SH1106Wire        display(I2C_DISPLAY_ADDRESS, SDA_PIN, SDC_PIN);
+//SSD1306Wire      display(I2C_DISPLAY_ADDRESS, SDA_PIN, SDC_PIN);
 
 // Scale Settings
 const int SCALE_DOUT_PIN = D2;
-const int SCALE_SCK_PIN = D3;
+const int SCALE_SCK_PIN = D1;
 HX711 scale(SCALE_DOUT_PIN, SCALE_SCK_PIN);
+
+void setup_wifi() {
+  delay(10);
+  WiFi.mode(WIFI_STA);
+  WiFi.begin(ssid, password);
+  wifi_station_set_hostname(esp_name);
+  delay(10);
+
+  // We start by connecting to a WiFi network
+  Serial.println();
+  Serial.print("Connecting to ");
+  Serial.println(ssid);
+  //WiFi.config(IPAddress(192,168,1,20), IPAddress(192,168,1,1), IPAddress(255,255,255,0), IPAddress(192,168,1,1));
+  //Serial.println(WiFi.status());
+
+ // wait for a connection
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+
+  Serial.println("");
+  Serial.println("WiFi connected");
+  Serial.println("IP address: ");
+  Serial.println(WiFi.localIP());
+}
+
 void setup() {
   Serial.begin(115200);
-  scale.set_scale();// <- set here calibration factor!!!
-  scale.tare();
+  display.init();
+  display.flipScreenVertically();
+
+  pinMode(buttonTare, INPUT);
+
+  setup_wifi();
+
+  client.setServer(mqtt_server, 1883);
+
+  ArduinoOTA.setPassword(ota_password);
+  ArduinoOTA.setHostname(esp_name);
+  ArduinoOTA.onStart([]() {
+    String type;
+    if (ArduinoOTA.getCommand() == U_FLASH)
+      type = "sketch";
+    else // U_SPIFFS
+      type = "filesystem";
+  });
+  ArduinoOTA.begin();
+
+  scale.set_scale(1497135.00 / 0.755);                      // this value is obtained by calibrating the scale with known weights; see the README for details
+  //scale.tare();
 }
+
+void reconnect() {
+  // Loop until we're reconnected
+  while (!client.connected()) {
+    Serial.print("Attempting MQTT connection...");
+    // Attempt to connect
+    if (client.connect(esp_name)) {
+      Serial.println("connected");
+      client.subscribe(mqtt_topic);
+    } else {
+      Serial.print("failed, rc=");
+      Serial.print(client.state());
+      Serial.println(" try again in 5 seconds");
+      // Wait 5 seconds before retrying
+      delay(5000);
+    }
+  }
+}
+
 void loop() {
-  float weight = scale.get_units(1);
-  Serial.println(String(weight, 2));
+  if (!client.connected()) {
+    reconnect();
+  }
+
+  client.loop();
+  ArduinoOTA.handle();
+
+  if (digitalRead(buttonTare) == LOW) {
+    display.drawString(50, 0, String("LOW"));
+    display.display();
+    //scale.tare();
+  }
+
+  float weight = scale.get_units(5)*1000-4447;
+  int gewicht = weight;
+
+  int laenge = (gewicht-100)/3.0;
+  if (laenge < 0) laenge = 0;
+
+  display.setFont(ArialMT_Plain_24);
+  display.setTextAlignment(TEXT_ALIGN_CENTER);
+  display.clear();
+  display.drawString(60, 3, String(gewicht) + "g");
+  display.drawString(60, 19, "---------------");
+  display.drawString(60, 36, String(laenge) + "m");
+  display.display();
+
+  delay(500);
 }
-// Test