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