138 lines
3.4 KiB
C++
138 lines
3.4 KiB
C++
// Screen libraries etc.
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#include <ESP8266WiFi.h>
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#include <SPI.h>
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#include <Wire.h>
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#include <Adafruit_GFX.h>
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#include <Adafruit_SSD1306.h>
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#include <ESP8266HTTPClient.h>
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#include <WiFiClientSecureBearSSL.h>
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#include "bitmaps.h"
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#include "wifi_credentials.h"
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// Screen stuff
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#define SCREEN_WIDTH 128 // OLED display width, in pixels
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#define SCREEN_HEIGHT 64 // OLED display height, in pixels
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#define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin)
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#define SCREEN_ADDRESS 0x3C
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// Button stuff
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#define BUTTON_PIN D6
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#define FRAME_DELAY 80
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// Peripherals
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Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
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// App state
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enum {
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CONNECTING,
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SHOWING_DEPARTURES
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} state = CONNECTING;
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int frame = 0;
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int buttonPushed = false;
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void ICACHE_RAM_ATTR onButtonFalling() {
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buttonPushed = true;
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}
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void setup() {
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Serial.begin(9600);
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// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
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if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
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Serial.println("SSD1306 allocation failed");
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for(;;); // Don't proceed, loop forever
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}
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Serial.println("SSD1306 initialized");
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display.clearDisplay();
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WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
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pinMode(BUTTON_PIN, INPUT_PULLUP);
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attachInterrupt(BUTTON_PIN, onButtonFalling, FALLING);
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display.setTextColor(SSD1306_WHITE);
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display.setTextSize(1);
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display.setCursor(0, 0);
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display.printf("Connecting to\n%s\n", WIFI_SSID);
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display.display();
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/*
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display.print(" 5 Mannheim sofort\n"
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"26 Kirchheim 9 min\n"
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" 5 Weinheim 20:13");
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*/
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}
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void drawSpinner (int frame) {
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display.fillRect(120, 56, spinny_dims[0], spinny_dims[1], SSD1306_BLACK);
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display.drawBitmap(120, 56, spinny[frame % spinny_dims[2]], spinny_dims[0], spinny_dims[1], SSD1306_WHITE);
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}
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void loop() {
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switch (state) {
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case CONNECTING: {
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if (WiFi.status() != WL_CONNECTED) {
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drawSpinner(frame++);
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display.display();
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delay(FRAME_DELAY);
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return;
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}
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display.clearDisplay();
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display.setCursor(0, 0);
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display.print("Connected!\nRequesting departures");
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display.display();
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std::unique_ptr<BearSSL::WiFiClientSecure> https(new BearSSL::WiFiClientSecure);
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https->setInsecure();
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HTTPClient client;
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if (!client.begin(*https, "vrnp.beany.club", 443, "/departures?stop_id=de:08221:1225&platform=A")) {
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display.clearDisplay();
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display.setCursor(0, 0);
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display.print("begin failed");
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display.display();
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for (;;);
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return;
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}
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client.addHeader("Authorization", AUTH_TOKEN);
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int statusCode = client.GET();
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if (statusCode != 200) {
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display.clearDisplay();
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display.setCursor(0, 0);
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display.printf("http non-ok: %d\n", statusCode);
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display.display();
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for (;;);
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return;
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}
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display.clearDisplay();
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display.setCursor(0, 0);
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display.print(client.getString());
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display.display();
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state = SHOWING_DEPARTURES;
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delay(FRAME_DELAY);
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return;
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}
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case SHOWING_DEPARTURES:
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if (WiFi.status() != WL_CONNECTED) {
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state = CONNECTING;
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return;
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}
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if (buttonPushed) {
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buttonPushed = false;
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delay(FRAME_DELAY);
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return;
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}
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delay(FRAME_DELAY);
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return;
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}
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}
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