1 | #include <Arduino.h>
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2 | #include <Wire.h>
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3 | #include <Adafruit_GFX.h>
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4 | #include <Adafruit_SSD1306.h>
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5 |
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6 | const char HTTP_HEADER[] PROGMEM = "<!DOCTYPE html><html lang=\"en\"><head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1, user-scalable=no\"/><title>{v}</title>";
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7 | const char HTTP_HEADER_END[] PROGMEM = "</head><body><div style='text-align:left;display:inline-block;min-width:260px;'>";
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8 | const char HTTP_BODY_END[] PROGMEM = "</div></body></html>";
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9 |
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10 | Adafruit_SSD1306 display(128, 64, &Wire, -1);
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11 | AsyncWebServer server(80);
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12 |
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13 | void setup() {
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14 | Serial.begin(115200);
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15 |
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16 | if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3D)) { // Address 0x3D for 128x64
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17 | Serial.println(F("SSD1306 allocation failed"));
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18 | for(;;); // Don't proceed, loop forever
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19 | }
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20 | display.display();
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21 | delay(2000); // Pause for 2 seconds
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22 |
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23 | // Clear the buffer
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24 | display.clearDisplay();
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25 |
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26 | WiFi.begin("DeineSSID", "DeinPasswort");
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27 | while (WiFi.status() != WL_CONNECTED) {
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28 | delay(500);
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29 | Serial.print(".");
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30 | }
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31 | Serial.println("WiFi connected");
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32 | Serial.println("IP address: ");
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33 | Serial.println(WiFi.localIP());
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34 |
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35 | server.on("/", HTTP_GET, handleRoot);
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36 | server.on("/lcd", HTTP_POST, handlepostLCD);
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37 | }
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38 |
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39 | void loop(){
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40 |
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41 | }
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42 |
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43 | void handleRoot(AsyncWebServerRequest *request){
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44 | uint8_t i,j;
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45 | float money = 0.0;
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46 |
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47 | String page = FPSTR(HTTP_HEADER);
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48 | page.replace("{v}", "LCD Test");
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49 | page += FPSTR(HTTP_HEADER_END);
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50 |
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51 | page += F("<h1>LCD Test</h1><br />");
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52 |
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53 | page += F("<form action=\"/lcd\" method=\"post\">");
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54 | page += F("LCD-Text: <input type=\"text\" name=\"LCDText\" value=\"\" />");
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55 | page += F("<button type=\"submit\">Senden</button></form>");
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56 |
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57 |
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58 | page += FPSTR(HTTP_BODY_END);
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59 |
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60 | request->send(200, "text/html",page);
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61 | }
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62 |
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63 | void handlepostLCD(AsyncWebServerRequest *request){
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64 | String page = FPSTR(HTTP_HEADER);
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65 |
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66 | page.replace("{v}", "LCD-Text");
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67 | page += FPSTR(HTTP_HEADER_END);
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68 | page += F("<h1>Text an LCD gesendet</h1><br />");
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69 | page += F("Text: ");
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70 | int params = request->params();
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71 | for(int i=0;i<params;i++){
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72 | AsyncWebParameter* p = request->getParam(i);
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73 | if(p->isPost()){
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74 | if(String(p->name().c_str()) == "LCDText"){
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75 | display.clearDisplay();
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76 | display.println(String(p->value().c_str()));
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77 | page += p->value().c_str();
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78 | display.display();
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79 | }
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80 | }
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81 | }
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82 |
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83 | page += FPSTR(HTTP_BODY_END);
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84 |
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85 | request->send(200, "text/html",page);
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86 |
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87 |
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88 | }
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