Initial commit
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commit
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.pio/
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credentials.h
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; PlatformIO Project Configuration File
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;
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; Build options: build flags, source filter
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; Upload options: custom upload port, speed and extra flags
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; Library options: dependencies, extra library storages
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; Advanced options: extra scripting
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;
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; Please visit documentation for the other options and examples
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; https://docs.platformio.org/page/projectconf.html
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[env]
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platform = espressif8266
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framework = arduino
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monitor_speed = 115200
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upload_speed = 500000
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# Serial1 (sign data) maps to D4 by default
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[env:d1_mini]
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board = d1_mini
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[env:nodemcuv2]
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board = nodemcuv2
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#pragma once
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namespace credentials {
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const String ssid = "my SSID";
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const String psk = "my PSK";
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const String mdnsHostname = "led-marquee-sign";
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}
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#include <ESP8266WiFiMulti.h>
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#include <ESP8266mDNS.h>
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#include <ESP8266WebServer.h>
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#include "credentials.h"
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#include "webserver.h"
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#include "util.h"
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static ESP8266WiFiMulti wifiMulti;
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void setup() {
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// serial console, for use via USB (also exposed to TXD0/RXD0 GPIOs)
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Serial.begin(115200);
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// transmit-only UART port, used for communication with the LED sign
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// the BAUD rate was deducued from the communication sent to the USB 12V UART adapter by the available Windows
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// software
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Serial1.begin(9600);
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// configure WiFi and connect to the network
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wifiMulti.addAP(credentials::ssid.c_str(), credentials::psk.c_str());
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Serial.println("Connecting to Wi-Fi network...");
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while (wifiMulti.run() != WL_CONNECTED) {
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delay(1000);
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Serial.print(".");
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}
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Serial.println();
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Serial.print("Connected to ");
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Serial.print(WiFi.SSID());
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Serial.print(", IP address: ");
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Serial.println(WiFi.localIP());
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// might be handy to have the IP written on the sign
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sendTextToSign(WiFi.localIP().toString());
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// publish this service using mDNS so that it's easy to find it in the LAN
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if (MDNS.begin(credentials::mdnsHostname)) {
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Serial.println("mDNS started up successfully");
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} else {
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Serial.println("Error: failed to start mDNS");
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}
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// configure HTTP endpoints
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configureWebServer();
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// don't forget to start the webserver!
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webServer.begin();
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}
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void loop() {
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webServer.handleClient();
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}
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#pragma once
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enum Brightness {
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Normal,
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Bright,
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};
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void sendTextToSign(String text, Brightness brightness = Bright) {
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// debugging
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Serial.print("Sending text \"");
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Serial.print(text);
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Serial.println("\"");
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// TODO: find out how the brightness attribute in the LED sign is encoded in the UART signal
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Serial1.print("f01A\\s");
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Serial1.print(text);
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Serial1.print("\r\r\r");
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}
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#pragma once
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#include "util.h"
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static ESP8266WebServer webServer(80);
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// use an anonymous namespace for the module's "private" methods
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// this prevents the methods from ending up in the global namespace
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namespace {
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void handleNotFound() {
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webServer.send(404, "text/plain", "urm... nope");
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}
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void handleIndex() {
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String htmlText = R"(
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<!DOCTYPE html>
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<html>
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<head>
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<title>LED Marquee Sign Controller</title>
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</head>
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<body>
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<h1>LED Marquee Sign Controller</h1>
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<form action="/" method="post">
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<fieldset>
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<div>
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<label for="text">Text to send:</label>
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<input type="text" name="text">
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</div>
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<div>
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<label for="bright">Bright mode</label>
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<input type="checkbox" name="bright">
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</div>
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<div>
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<button>Send</button>
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</div>
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</fieldset>
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</form>
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</body>
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</html>
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)";
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webServer.send(200, "text/html", htmlText);
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}
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void handleFormSend() {
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sendTextToSign("HELLO FORM");
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// redirect back to root page
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webServer.sendHeader("Location", "/");
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webServer.send(303);
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}
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// RESTful API endpoint -- returns a proper status code rather than a redirect
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void handleApiSend() {
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sendTextToSign("HELLO API");
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webServer.send(200, "text/plain", "ok");
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}
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}
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void configureWebServer() {
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webServer.onNotFound(handleNotFound);
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webServer.on("/", HTTPMethod::HTTP_GET, handleIndex);
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webServer.on("/", HTTPMethod::HTTP_POST, handleFormSend);
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webServer.on("/send", HTTPMethod::HTTP_POST, handleApiSend);
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}
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