From 76e0e5431827f00db6666c9410929b7485f42ec4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=A9bastien?= <sebastien@svallee.fr>
Date: Sun, 17 Dec 2017 01:06:06 +0100
Subject: [PATCH] First commit

---
 LibreMetric.ino | 169 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 169 insertions(+)
 create mode 100644 LibreMetric.ino

diff --git a/LibreMetric.ino b/LibreMetric.ino
new file mode 100644
index 0000000..7c0f267
--- /dev/null
+++ b/LibreMetric.ino
@@ -0,0 +1,169 @@
+
+//################# LIBRARIES ##########################
+#include <ESP8266WiFi.h>
+#include <ESP8266WebServer.h>
+#include <WiFiManager.h>     // https://github.com/tzapu/WiFiManager
+#include <DNSServer.h>
+#include <SPI.h>
+#include <Adafruit_GFX.h>
+#include <Max72xxPanel.h>
+#include <time.h>
+
+//################# DISPLAY CONNECTIONS ################
+// LED Matrix Pin -> ESP8266 Pin
+// Vcc            -> 3v  (3V on NodeMCU 3V3 on WEMOS)
+// Gnd            -> Gnd (G on NodeMCU)
+// DIN            -> D7  (Same Pin for WEMOS)
+// CS             -> D4  (Same Pin for WEMOS)
+// CLK            -> D5  (Same Pin for WEMOS)
+
+//################ PROGRAM SETTINGS ####################
+String version = "0.1b";
+int PORT = 80;
+int wait   = 50;
+int spacer = 1;
+int width  = 5 + spacer;
+String SITE_WIDTH =  "1000";
+int timezone = 1;
+int dstOffset = 1;
+const char* ntpServer = "fr.pool.ntp.org";
+int brightness = 2;
+int pinCS = D4;
+int numberOfHorizontalDisplays = 4;
+int numberOfVerticalDisplays   = 1;
+
+//################## INITIALIZING ######################
+char time_value[20];
+String message, webpage;
+ESP8266WebServer server(PORT); 
+Max72xxPanel matrix = Max72xxPanel(pinCS, numberOfHorizontalDisplays, numberOfVerticalDisplays);
+
+
+void setup() {
+  Serial.begin(115200); // initialize serial communications
+  WiFiManager wifiManager;
+  wifiManager.setTimeout(180);
+  //fetches ssid and password and tries to connect, if connections succeeds it starts an access point with the name called "LibreMetric" and waits in a blocking loop for configuration
+  if(!wifiManager.autoConnect("LibreMetric")) {
+    Serial.println(F("failed to connect and timeout occurred"));
+    delay(6000);
+    ESP.reset(); //reset and try again
+    delay(180000);
+  }
+  // At this stage the WiFi manager will have successfully connected to a network, or if not will try again in 180-seconds
+  Serial.println(F("WiFi connected..."));
+  Serial.println(WiFi.localIP());
+  configTime(timezone * 3600, dstOffset * 3600, ntpServer); // First sync of time with (S)NTP
+  
+//----------------------------------------------------------------------
+  server.begin();
+  Serial.println(F("Webserver started..."));
+  matrix.setIntensity(brightness);
+  brightness=16;
+  Serial.print(numberOfHorizontalDisplays);
+  Serial.println(" displays configurated...");
+  
+  for (int i=0; i<numberOfHorizontalDisplays; i++){
+    Serial.print("Changing orientation of display #");
+    Serial.println(i);
+    matrix.setRotation(i, 1);
+  }
+  
+  server.on("/", GetMessage);
+  message = "Bienvenue !";
+}
+
+void loop() {
+  server.handleClient();
+  matrix.fillScreen(LOW);
+  time_t now = time(nullptr);
+  String time = String(ctime(&now));
+  time.trim();
+  time.substring(11,19).toCharArray(time_value, 10); 
+  matrix.drawChar(2,0, time_value[0], HIGH,LOW,1); // H
+  matrix.drawChar(8,0, time_value[1], HIGH,LOW,1); // HH
+  matrix.drawChar(14,0,time_value[2], HIGH,LOW,1); // HH:
+  matrix.drawChar(20,0,time_value[3], HIGH,LOW,1); // HH:M
+  matrix.drawChar(26,0,time_value[4], HIGH,LOW,1); // HH:MM
+  matrix.write(); // Send bitmap to display
+  if (message != "") {
+    Serial.print("On envoi \"");
+    Serial.print(message);
+    Serial.println("\" à LibreMetric");
+    display_message(message); // Display the message
+    Serial.print("Message envoyé à LibreMetric : ");
+    Serial.println(message);
+    message = "";
+  }
+  if (brightness <= 15) {
+    Serial.print("Nouvelle luminosité : ");
+    Serial.println(brightness);
+    matrix.setIntensity(brightness);
+    brightness = 16;
+  }
+}
+
+void display_message(String message){
+   for ( int i = 0 ; i < width * message.length() + matrix.width() - spacer; i++ ) {
+    matrix.fillScreen(LOW);
+    int letter = i / width;
+    int x = (matrix.width() - 1) - i % width;
+    int y = (matrix.height() - 8) / 2; // center the text vertically
+    while ( x + width - spacer >= 0 && letter >= 0 ) {
+      if ( letter < message.length() ) {
+        matrix.drawChar(x, y, message[letter], HIGH, LOW, 1); // HIGH LOW means foreground ON, background OFF, reverse these to invert the display!
+      }
+      letter--;
+      x -= width;
+    }
+    matrix.write(); // Send bitmap to display
+    delay(wait);
+  }
+}
+
+void GetMessage() {
+  webpage = "";
+  append_page_header();
+  String IPaddress = WiFi.localIP().toString();
+  webpage += "<form action=\"http://"+IPaddress+"\" method='post'>";
+  webpage += "<P>Message à envoyer : <INPUT type='text' size ='60' name='message' placeholder='Votre message'><input type='submit', value='Envoyer !'></form></P><br>";
+    webpage += "<form action=\"http://"+IPaddress+"\" method='post'>";
+  webpage += "<P>Luminosité : <INPUT type='text' size ='60' name='brightness' placeholder='Luminosité de 0 à 15'><input type='submit', value='Envoyer !'></form></P><br>";
+  append_page_footer();
+  if (server.args() > 0 ) { // Arguments were received
+    for ( uint8_t i = 0; i  <= server.args(); i++ ) {
+      String Argument_Name   = server.argName(i);
+      String client_response = server.arg(i);
+      if (Argument_Name == "message") message = client_response;
+      if (Argument_Name == "brightness") brightness = client_response.toInt();
+    }
+  }
+  server.send(200, "text/html", webpage); // Send a response to the client to enter their inputs, if needed, Enter=defaults
+}
+
+void append_page_header() {
+  webpage  = F("<!DOCTYPE HTML><html lang='fr'><head>");
+  webpage += "<META HTTP-EQUIV='Content-Type' CONTENT='text/html; charset=utf-8'>";
+  webpage += F("<title>Envoi de messages - LibreMetric</title><style>");
+  webpage += F("body {width:");
+  webpage += SITE_WIDTH;
+  webpage += F("px;margin:0 auto;font-family:arial;font-size:14px;text-align:center;color:#776688;background-color:#F7F2Fd;}");
+  webpage += F("ul{list-style-type:circle; margin:0;padding:0;overflow:hidden;background-color:#d8d8d8;font-size:14px;}");
+  webpage += F("li{float:left;border-right:1px solid #bbb;}last-child {border-right:none;}");
+  webpage += F("li a{display: block;padding:2px 12px;text-decoration:none;}");
+  webpage += F("li a:hover{background-color:#FFFFFF;}");
+  webpage += F("section {font-size:16px;}");
+  webpage += F("p {background-color:#D1DBE3;font-size:16px;}");
+  webpage += F("div.header,div.footer{padding:0.5em;color:white;background-color:gray;clear:left;}");
+  webpage += F("h1{background-color:#d8d8d8;font-size:26px;}");
+  webpage += F("h2{color:#9370DB;font-size:22px;line-height:65%;}");
+  webpage += F("h3{color:#9370DB;font-size:16px;line-height:55%;}");
+  webpage += F("</style></head><body><h1>LibreMetric ");
+  webpage += version+"</h1>";
+}
+
+void append_page_footer(){ // Saves repeating many lines of code for HTML page footers
+  webpage += F("<ul><li><a href='/'>Recharger la page</a></li></ul>");
+  webpage += F("</body></html>");
+}
+