Tiny DeskBuddy Dashboard

#include <Arduino.h>
#include <SPI.h>
#include <Wire.h>
#include <WiFi.h>
#include <WebServer.h>
#include <Preferences.h>
#include <WiFiClientSecure.h>
#include <HTTPClient.h>
#include <ArduinoJson.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ST7789.h>
#include <Adafruit_MPU6050.h>
#include <XPT2046_Touchscreen.h>
#include <time.h>
#include "secrets.h"
WebServer setupServer(80);
Preferences settings;
bool setupActive=false;
uint32_t wifiStarted=0, restartAt=0;
void startWifiSetup(){
  if(setupActive) return;
  setupActive=true;
  WiFi.mode(WIFI_AP_STA);
  WiFi.softAP("DeskBuddy-Setup", "deskbuddy123");
  setupServer.on("/", HTTP_GET, [](){
    setupServer.send(200,"text/html", R"HTML(<!doctype html><meta name="viewport" content="width=device-width"><h1>DeskBuddy Wi-Fi</h1><p>Enter your home 2.4 GHz Wi-Fi details. Leave optional GitHub and Finnhub settings blank in secrets.h if unused.</p><form method="post" action="/save"><label>Wi-Fi name <input name="ssid" maxlength="32" required></label><br><label>Wi-Fi password <input name="password" type="password" maxlength="63"></label><br><button>Save and restart</button></form>)HTML");
  });
  setupServer.on("/save", HTTP_POST, [](){
    String name=setupServer.arg("ssid"), pass=setupServer.arg("password");
    if(name.length()==0 || name.length()>32 || pass.length()>63){setupServer.send(400,"text/plain","Invalid Wi-Fi details");return;}
    settings.putString("ssid",name);settings.putString("pass",pass);
    setupServer.send(200,"text/plain","Saved. Restarting. Rejoin your home Wi-Fi. If connection fails, setup returns after 30 seconds.");
    restartAt=millis()+1500;
  });
  setupServer.begin();
}
Adafruit_ST7789 lcd(5,4,2);
XPT2046_Touchscreen touch(1);
Adafruit_MPU6050 imu;
GFXcanvas1 canvas(320,240);
// Every page and startup screen uses a solid black background.
constexpr uint16_t BACKGROUND_COLOR = ST77XX_BLACK;
bool hasImu=false, dirty=true;
int page=0,mood=0,dx=0,dy=0;
const char* moods[]={"CONTENT","HAPPY","SLEEPY","CURIOUS"};
String weather="Waiting for Wi-Fi",stock="Set FINNHUB_TOKEN",github="Set GITHUB_USER";
SemaphoreHandle_t dataLock;
String wCopy,sCopy,gCopy;
// Network runs separately so HTTPS timeouts never stop touch and animation.
bool request(const String& url, JsonDocument &doc) {
  WiFiClientSecure tls;
  // Prototype policy: encrypted transport but no server identity validation.
  // Do not send a privileged GitHub token; only a restricted quote key is used.
  tls.setInsecure();
  HTTPClient http; http.useHTTP10(true); http.setConnectTimeout(4000); http.setTimeout(5000);
  if(!http.begin(tls,url)) return false;
  http.addHeader("User-Agent","Tiny-ESP-DeskBuddy/1.0");
  int code=http.GET(); bool ok=false;
  if(code==200 && (http.getSize()<0 || http.getSize()<=16384)) ok=!deserializeJson(doc,http.getStream());
  http.end(); return ok;
}
void network(void*) {
  uint32_t lastWeather=0,lastStock=0,lastGit=0;
  bool first=true;
  for(;;) {
    if(WiFi.status()==WL_CONNECTED) {
      uint32_t now=millis(); JsonDocument doc;
      if(first || now-lastWeather>=900000) {
        String v="Weather unavailable";
        if(request(String("https://api.open-meteo.com/v1/forecast?latitude=")+LATITUDE+"&longitude="+LONGITUDE+"&current=temperature_2m,weather_code",doc) && doc["current"]["temperature_2m"].is<float>())
          v=String(doc["current"]["temperature_2m"].as<float>(),1)+" C\nWMO code "+String(doc["current"]["weather_code"].as<int>());
        xSemaphoreTake(dataLock,portMAX_DELAY); weather=v; xSemaphoreGive(dataLock); lastWeather=now;
      }
      if(strlen(FINNHUB_TOKEN) && (first || now-lastStock>=300000)) {
        doc.clear(); String v="AAPL quote unavailable";
        if(request(String("https://finnhub.io/api/v1/quote?symbol=AAPL&token=")+FINNHUB_TOKEN,doc) && doc["c"].as<float>()>0)
          v="$"+String(doc["c"].as<float>(),2)+"\n"+String(doc["dp"].as<float>(),2)+" %";
        xSemaphoreTake(dataLock,portMAX_DELAY);stock=v;xSemaphoreGive(dataLock);lastStock=now;
      }
      if(strlen(GITHUB_USER) && (first || now-lastGit>=900000)) {
        doc.clear();String v="GitHub unavailable";
        if(request(String("https://api.github.com/users/")+GITHUB_USER,doc) && doc["public_repos"].is<int>())
          v=String(doc["public_repos"].as<int>())+" public repos\n"+String(doc["followers"].as<int>())+" followers";
        xSemaphoreTake(dataLock,portMAX_DELAY);github=v;xSemaphoreGive(dataLock);lastGit=now;
      }
      first=false;
    }
    vTaskDelay(pdMS_TO_TICKS(1000));
  }
}
void text(int x,int y,const String& s,int size=2){canvas.setCursor(x,y);canvas.setTextSize(size);canvas.print(s);}
void render(time_t now) {
  canvas.fillScreen(0);canvas.setTextColor(1);canvas.setTextWrap(true);

  struct tm tm; localtime_r(&now,&tm); char buf[48];
  if(setupActive){
    text(10,48,"WI-FI SETUP");
    text(10,80,"Join: DeskBuddy-Setup",1);
    text(10,102,"Password: deskbuddy123",1);
    text(10,124,"Open http://192.168.4.1",1);
    text(10,152,"Enter home Wi-Fi details",1);
  } else if(page==0){
    // Solid rounded-square eyes; tilt moves the eyes, not black pupils.
    const int eyeSize = mood==3 ? 76 : 72;
    for(int x: {96,224}) {
      canvas.fillRoundRect(x-eyeSize/2+dx,65+dy,eyeSize,eyeSize,14,1);
      if(mood==2) canvas.fillRect(x-eyeSize/2+dx,65+dy,eyeSize,eyeSize/2,0);
    }
    if(mood==1){
      // Thick, softly stepped smile.
      for(int x=-24;x<=24;++x){
        int y=180-(x*x)/48;
        canvas.fillCircle(160+x,y,3,1);
      }
    } else {
      int mouthWidth=mood==3?22:44;
      canvas.fillRoundRect(160-mouthWidth/2,174,mouthWidth,7,3,1);
    }

  } else if(page==1) {
    if(now<1700000000) text(15,80,"Waiting for NTP");
    else {strftime(buf,sizeof(buf),"%H:%M:%S",&tm);text(16,95,buf,4);}
  } else if(page==2) {
    if(now<1700000000)text(15,80,"Waiting for NTP");
    else {strftime(buf,sizeof(buf),"%A\n\n%Y-%m-%d",&tm);text(16,65,buf);}
  } else if(page==3) {text(16,85,wCopy);}
  else if(page==4){
    if(now<1700000000)text(12,65,"Waiting for NTP");
    else {
      double age=fmod((double(now)-947182440.0)/86400.0,29.530588853);if(age<0)age+=29.530588853;
      const char* names[]={"New moon","Waxing crescent","First quarter","Waxing gibbous","Full moon","Waning gibbous","Last quarter","Waning crescent"};
      text(12,65,names[int(age/29.530588853*8+0.5)%8]);
      text(12,110,String(50*(1-cos(age/29.530588853*2*PI)),0)+"% illuminated");
    }
  } else if(page==5){text(16,50,"AAPL",2);text(16,95,sCopy);}
  else {text(12,55,GITHUB_USER);text(12,95,gCopy);}
  // Small arrows have generous touch areas across every information page.
  if(!setupActive && page!=0) {
    canvas.drawLine(54,209,47,216,1);
    canvas.drawLine(47,216,54,223,1);
    canvas.drawLine(266,209,273,216,1);
    canvas.drawLine(273,216,266,223,1);
    canvas.fillRoundRect(142,214,36,5,2,1);
  }
  lcd.drawBitmap(0,0,canvas.getBuffer(),320,240,ST77XX_BLUE,BACKGROUND_COLOR);
}
void setup(){
  Serial.begin(115200);
  delay(150);
  Serial.println("DeskBuddy V1.1: starting (USB only)");
  dataLock=xSemaphoreCreateMutex();
  if(!dataLock) { Serial.println("Cannot allocate data mutex; restart board"); while(true) delay(1000); }
  pinMode(5,OUTPUT);digitalWrite(5,HIGH);pinMode(1,OUTPUT);digitalWrite(1,HIGH);
  // Keep both SPI devices deselected before initializing the shared bus.
  SPI.begin(12,13,11);
  lcd.init(240,320);
  lcd.setSPISpeed(4000000); // conservative speed for short jumper wires
  lcd.setRotation(1);
  // This module displays blue as yellow with the default ST7789 inversion.
  // Disable inversion before drawing so black stays black and blue stays blue.
  lcd.invertDisplay(false);
  lcd.fillScreen(BACKGROUND_COLOR);
  lcd.setTextColor(ST77XX_BLUE);
  lcd.setTextSize(2);
  lcd.fillCircle(148,120,3,ST77XX_BLUE);
  lcd.fillCircle(160,120,3,ST77XX_BLUE);
  lcd.fillCircle(172,120,3,ST77XX_BLUE);
  Serial.println("ST7789 initialization commands sent; physical display not detectable");
  touch.begin();touch.setRotation(1);
  Wire.begin(8,9);
  Wire.setClock(100000);
  Wire.setTimeOut(50);
  hasImu=imu.begin(0x68,&Wire);
  if(!hasImu) hasImu=imu.begin(0x69,&Wire);
  Serial.println(hasImu ? "MPU6050 ready" : "MPU6050 absent: centered eyes, continuing");
  settings.begin("deskbuddy",false);
  String ssid=settings.getString("ssid", "");
  String pass=settings.getString("pass", "");
  WiFi.mode(WIFI_STA);WiFi.setAutoReconnect(true);
  wifiStarted=millis();
  if(ssid.length()) WiFi.begin(ssid.c_str(),pass.c_str());
  else startWifiSetup();
  configTzTime(TZ_RULE,"pool.ntp.org","time.nist.gov");
  if(xTaskCreate(network,"network",12288,nullptr,1,nullptr)!=pdPASS) {
    weather="Network task unavailable";
    Serial.println("Network task allocation failed; local UI still available");
  }
  Serial.println("Startup complete");
  wCopy=weather; sCopy=stock; gCopy=github;
  render(time(nullptr)); dirty=false;
}
void loop(){
  if(restartAt && (int32_t)(millis()-restartAt)>=0) ESP.restart();
  if(!setupActive && WiFi.status()!=WL_CONNECTED && millis()-wifiStarted>30000) {startWifiSetup();dirty=true;}
  if(setupActive){
    setupServer.handleClient();
    if(WiFi.status()==WL_CONNECTED && !restartAt){setupServer.stop();WiFi.softAPdisconnect(true);WiFi.mode(WIFI_STA);setupActive=false;wifiStarted=millis();dirty=true;}
  }
  static uint32_t tick=0,pressTime=0;
  static bool pressed=false, infoTouchHandled=false;
  static int x0=0,y0=0,x1=0,y1=0,maxMove=0;
  static time_t previous=0;static bool online=false;
  static uint32_t lastTouch=0,lastContact=0;
  if(millis()-lastTouch>=10){
    lastTouch=millis();
    if(touch.touched()){
      TS_Point p=touch.getPoint();
      // Ignore very light/noisy contact. Keep existing module calibration.
      if(p.z>=200){
        x1=constrain(map(p.x,TOUCH_X_MIN,TOUCH_X_MAX,0,319),0,319);
        y1=constrain(map(p.y,TOUCH_Y_MIN,TOUCH_Y_MAX,0,239),0,239);
        lastContact=millis();
        if(!pressed){
          pressed=true;x0=x1;y0=y1;pressTime=millis();maxMove=0;
          infoTouchHandled=false;
          // Information pages respond on contact, not on a release that
          // can be missed during a screen redraw. One action per press.
          if(!setupActive && page!=0){
            if(x0<107) page=(page+6)%7;
            else if(x0>=213) page=(page+1)%7;
            else page=0;
            infoTouchHandled=true;
            dirty=true;
          }
        }
        maxMove=max(maxMove,max(abs(x1-x0),abs(y1-y0)));
      }
    }
    // Brief gaps do not split one finger press into several taps.
    if(pressed && millis()-lastContact>=40){
      pressed=false;
      // Eye targets include all tilt positions, with room for a finger.
      uint32_t duration=lastContact-pressTime;
      if(!setupActive && !infoTouchHandled && maxMove<30 && duration<800){
        int action=0;
        if(page==0){
          if(y0>=40 && y0<=160 && y1>=40 && y1<=160){
            if(x0>=40 && x0<=150 && x1>=40 && x1<=150) action=-1;
            else if(x0>=170 && x0<=280 && x1>=170 && x1<=280) action=1;
          } else if(y0>=160 && y1>=160 && x0>=120 && x0<=200 && x1>=120 && x1<=200) action=2;
        } else {
          // Entire left/right thirds navigate, not just a tiny bottom target.
          // The middle third returns home on every information page.
          if(x0<107) action=-1;
          else if(x0>=213) action=1;
          else action=2;
        }
        if(action==-1) page=(page+6)%7;
        else if(action==1) page=(page+1)%7;
        else if(action==2){if(page==0) mood=(mood+1)%4;page=0;}
        if(action) dirty=true;
      }
    }
  }
  if(millis()-tick>=40){
    tick=millis();
    if(hasImu && page==0){sensors_event_t a,g,t;imu.getEvent(&a,&g,&t);
      int nx=constrain(int(a.acceleration.x*1.5),-13,13),ny=constrain(int(a.acceleration.y*1.5),-16,16);
      if(abs(nx-dx)>1||abs(ny-dy)>1){dx=nx;dy=ny;dirty=true;}}
    time_t now=time(nullptr);if(now!=previous){previous=now;if(page==1||page==2||page==4)dirty=true;}
    bool connected=WiFi.status()==WL_CONNECTED;if(connected!=online){online=connected;dirty=true;}
    xSemaphoreTake(dataLock,portMAX_DELAY);
    if(wCopy!=weather||sCopy!=stock||gCopy!=github){wCopy=weather;sCopy=stock;gCopy=github;dirty=true;}
    xSemaphoreGive(dataLock);
  }
  if(dirty){render(time(nullptr));dirty=false;}
  delay(2);
}