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Official Hardware Mega GIGA R1 WiFi
1 
#include <WiFi.h>            // WiFi library for GIGA R1
#include <HTTPClient.h>      // For API requests
#include <Adafruit_GFX.h>    // Graphics library
#include <Adafruit_ST7735.h> // ST7735 library
#include <SPI.h>             // SPI for LCD
#include <USBHostGiga.h>     // USB host library for keyboard

// ST7735 pin definitions
#define TFT_CS    10  // PB10
#define TFT_RST   9   // PB9
#define TFT_DC    8   // PB8
#define TFT_MOSI  15  // PB15 (SPI1 MOSI)
#define TFT_SCLK  13  // PB13 (SPI1 SCK)

// Initialize ST7735 LCD
Adafruit_ST7735 tft = Adafruit_ST7735(TFT_CS, TFT_DC, TFT_MOSI, TFT_SCLK, TFT_RST);

// USB keyboard setup
USBHostGiga usbHost;
KeyboardController keyboard(usbHost);
String inputString = "";
String ssid = "";
String password = "";
bool enteringSSID = true;
bool enteringPassword = false;
bool wifiConnected = false;

// OpenAI API key
const char* apiKey = "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";

// ChatGPT API endpoint
const char* chatGPTUrl = "https://api.openai.com/v1/chat/completions";

void setup() {
  Serial.begin(115200);

  // Initialize LCD
  tft.initR(INITR_BLACKTAB); // Adjust for your ST7735 variant
  tft.setRotation(1);        // Landscape mode
  tft.fillScreen(ST7735_BLACK);
  tft.setTextColor(ST7735_WHITE);
  tft.setTextSize(1);
  tft.setCursor(0, 0);
  tft.print("Enter SSID:");

  // Start USB host
  usbHost.begin();
}

void loop() {
  usbHost.Task(); // Process USB events

  if (!wifiConnected) {
    handleWiFiSetup();
  } else {
    if (inputString.length() > 0 && keyboard.getKey() == 13) { // Enter key for ChatGPT prompt
      sendToChatGPT(inputString);
      inputString = "";
    }
  }
}

// Keyboard callback
void keyPressed() {
  char key = keyboard.getKey();
  if (!wifiConnected) {
    if (key >= 32 && key <= 126) { // Printable characters
      inputString += key;
      displayInput();
    } else if (key == 13) { // Enter key
      if (enteringSSID) {
        ssid = inputString;
        inputString = "";
        enteringSSID = false;
        enteringPassword = true;
        tft.fillScreen(ST7735_BLACK);
        tft.setCursor(0, 0);
        tft.print("Enter Password:");
      } else if (enteringPassword) {
        password = inputString;
        inputString = "";
        enteringPassword = false;
        connectToWiFi();
      }
    }
  } else if (key >= 32 && key <= 126) { // ChatGPT input
    inputString += key;
    tft.fillScreen(ST7735_BLACK);
    tft.setCursor(0, 0);
    tft.print("You: ");
    tft.print(inputString);
  }
}

void displayInput() {
  tft.fillScreen(ST7735_BLACK);
  tft.setCursor(0, 0);
  if (enteringSSID) {
    tft.print("Enter SSID:");
  } else if (enteringPassword) {
    tft.print("Enter Password:");
  }
  tft.setCursor(0, 20);
  tft.print(inputString);
}

void connectToWiFi() {
  tft.fillScreen(ST7735_BLACK);
  tft.setCursor(0, 0);
  tft.print("Connecting to ");
  tft.print(ssid);

  WiFi.begin(ssid.c_str(), password.c_str());
  int attempts = 0;
  while (WiFi.status() != WL_CONNECTED && attempts < 20) {
    delay(500);
    Serial.print(".");
    attempts++;
  }

  if (WiFi.status() == WL_CONNECTED) {
    tft.fillScreen(ST7735_BLACK);
    tft.setCursor(0, 0);
    tft.print("WiFi Connected");
    wifiConnected = true;
    delay(2000);
    tft.fillScreen(ST7735_BLACK);
    tft.setCursor(0, 0);
    tft.print("Type a message:");
  } else {
    tft.fillScreen(ST7735_BLACK);
    tft.setCursor(0, 0);
    tft.print("WiFi Failed");
    delay(2000);
    tft.fillScreen(ST7735_BLACK);
    tft.setCursor(0, 0);
    tft.print("Enter SSID:");
    enteringSSID = true;
    wifiConnected = false;
  }
}

void sendToChatGPT(String prompt) {
  if (WiFi.status() == WL_CONNECTED) {
    HTTPClient http;
    http.begin(chatGPTUrl);
    http.addHeader("Content-Type", "application/json");
    http.addHeader("Authorization", String("Bearer ") + apiKey);

    String payload = "{\"model\": \"gpt-3.5-turbo\", \"messages\": [{\"role\": \"user\", \"content\": \"" + prompt + "\"}], \"max_tokens\": 50}";
    int httpCode = http.POST(payload);

    if (httpCode > 0) {
      String response = http.getString();
      String chatResponse = parseChatGPTResponse(response);
      displayResponse(chatResponse);
    } else {
      tft.fillScreen(ST7735_BLACK);
      tft.setCursor(0, 0);
      tft.print("HTTP Error: ");
      tft.print(httpCode);
    }
    http.end();
  }
}

String parseChatGPTResponse(String json) {
  int contentStart = json.indexOf("\"content\":\"") + 11;
  int contentEnd = json.indexOf("\"", contentStart);
  return json.substring(contentStart, contentEnd);
}

void displayResponse(String response) {
  tft.fillScreen(ST7735_BLACK);
  tft.setCursor(0, 0);
  tft.print("ChatGPT: ");
  int len = response.length();
  for (int i = 0; i < len; i += 20) { // Wrap text every 20 chars
    tft.setCursor(0, 20 + (i / 20) * 10);
    tft.print(response.substring(i, min(i + 20, len)));
  }
}

void handleWiFiSetup() {
  // Wait for WiFi credentials to be entered
  if (!enteringSSID && !enteringPassword && !wifiConnected) {
    connectToWiFi();
  }
}

error
C:\Users\Nelson\Downloads\sketch_feb26a\sketch_feb26a.ino:2:10: fatal error: HTTPClient.h: No such file or directory
#include <HTTPClient.h> // For API requests
^~~~~~~~~~~~~~
compilation terminated.
exit status 1

Compilation error: HTTPClient.h: No such file or directory

2

HttpClient | Arduino Documentation

3

This is an odd place to put Arduino program (sketch) code.

4

Perhaps he downloaded somebody's sketch and tried to compile it there. That would explain his issue.

5

Did you instal HttpClient? If not you should probably read this and possibly download it Documentary
Download link

6

No

Sonofcy via Arduino Forum <notifications@arduino.discoursemail.com> 於 2025年3月1日 週六 下午11:16 寫道：

7

Where is the libraries folder located?

8

C:\Users\Nelson\Documents\Arduino\libraries\HttpClient