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inkplate6 google cal project upload
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‎examples/Inkplate6/Projects/Inkplate6_Google_Calendar/Inkplate6_Google_Calendar.ino‎

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/*
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Inkplate10_Google_Calendar for Soldered Inkplate 10
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Getting Started:
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For setup and documentation, visit: https://inkplate.readthedocs.io/en/latest/
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Before You Start:
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- Enter your WiFi credentials carefully (they are case-sensitive).
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- Update the timeZone variable according to your data
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- Get Google Calendar public calendar ID and API key:
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1. Calendar ID: Go to calendar.google.com > Settings > Select your calendar > "Integrate calendar" > Copy "Calendar ID" (e.g. [email protected]).
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2. API Key: Go to console.cloud.google.com > Select/create a project > "APIs & Services" > "Credentials" > "Create credentials" > API key.
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Make sure your calendar is public under "Access permissions" in calendar settings.
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*/
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#include "src/includes.h" // Include necessary libraries and dependencies for Inkplate and networking
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const char *ssid = "Soldered-testingPurposes";
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const char *password = "Testing443";
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int timeZone = 2; // timeZone is the number in (UTC + number) in your time zone UTC + 2 for Osijek, UTC - 4 for New York City
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String calendarID = "[email protected]";
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String apiKey = "yourapikey";
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// String ntpServer = "pool.ntp.org"; // in case you want to use a different one
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Inkplate inkplate(INKPLATE_3BIT);
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calendarData calendar;
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Network network(calendarID, apiKey);
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Gui gui(inkplate);
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// --- Deep Sleep Configuration ---
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#define uS_TO_S_FACTOR 1000000 // Convert microseconds to seconds
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#define TIME_TO_SLEEP 600 // Sleep time: 600 seconds = 10 minutes
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void setup()
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{
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Serial.begin(115200); // Initialize serial monitor for debugging
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inkplate.begin(); // Start the Inkplate display
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inkplate.clearDisplay(); // Clear the screen
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inkplate.setRotation(1); // Portrait mode | if it's upside down do setRotation(3);
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// Attempt to connect to WiFi
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const unsigned long timeout = 30000;
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unsigned long startTime = millis();
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bool connected = false;
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while (!connected && (millis() - startTime) < timeout)
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{
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connected = inkplate.connectWiFi(ssid, password, 10, true);
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}
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// If WiFi failed, display error message
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if (!connected)
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{
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gui.wifiError();
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}
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else
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{
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configTime(timeZone * 3600, 0, "pool.ntp.org");
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// Fetch and display calendar
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if (network.fetchCalendar(&calendar))
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{
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Serial.println("Calendar loaded.");
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gui.showCalendar(&calendar);
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}
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else
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{
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Serial.println("Failed to load calendar.");
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gui.showError("Failed to load calendar.");
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}
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}
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// Sleep to save power; wakes every 10 minutes
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esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR); // Activate wake-up timer -- wake up after 30mins here
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esp_deep_sleep_start(); // Put ESP32 into deep sleep.
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}
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void loop()
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{
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// Should remain empty, main logic is in the setup();
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}

‎examples/Inkplate6/Projects/Inkplate6_Google_Calendar/src/Gui.cpp‎

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#include "Gui.h"
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#include <ctime>
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// font
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#include "fonts/FreeSans9pt7b.h"
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#include "fonts/FreeSans12pt7b.h"
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#include "fonts/FreeSans18pt7b.h"
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#include "fonts/FreeSans48pt7b.h"
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#include "fonts/FreeSansBold48pt7b.h"
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#include "fonts/FreeSansBold24pt7b.h"
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Gui::Gui(Inkplate &inkplate) : inkplate(inkplate) {}
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String Gui::getDayName(int dayIndex)
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{
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const char *days[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
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return days[dayIndex];
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}
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String Gui::getMonthName(int monthIndex)
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{
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const char *months[] = {"January", "February", "March", "April", "May", "June",
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"July", "August", "September", "October", "November", "December"};
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return months[monthIndex];
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}
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String Gui::formatHour(const String &isoDateTime)
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{
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if (isoDateTime.length() < 16)
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return "";
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return isoDateTime.substring(11, 16); // "HH:MM" from ISO 8601
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}
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String Gui::formatDate(const String &isoDateTime)
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{
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if (isoDateTime.length() < 10)
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return "";
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return isoDateTime.substring(8, 10); // "YYYY-MM-DD"
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}
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void Gui::wifiError()
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{
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inkplate.clearDisplay();
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inkplate.setTextColor(0);
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inkplate.setFont(&FreeSans18pt7b);
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inkplate.setCursor(50, 150);
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inkplate.print("WiFi connection failed.");
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inkplate.setCursor(50, 200);
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inkplate.print("Check credentials or try again.");
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inkplate.display();
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}
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void Gui::drawHeader(const String &title)
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{
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inkplate.clearDisplay();
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inkplate.setTextSize(3);
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inkplate.setTextColor(0);
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inkplate.setCursor(10, 10);
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inkplate.println(title);
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}
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String Gui::getShortDayName(int dayIndex)
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{
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const char *shortDays[] = {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
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return shortDays[dayIndex];
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}
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bool Gui::isCurrentEvent(const String &startTimeStr, const String &endTimeStr)
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{
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struct tm timeInfo;
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if (!getLocalTime(&timeInfo))
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return false;
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time_t now = mktime(&timeInfo);
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struct tm startTm = {}, endTm = {};
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startTm.tm_year = startTimeStr.substring(0, 4).toInt() - 1900;
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startTm.tm_mon = startTimeStr.substring(5, 7).toInt() - 1;
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startTm.tm_mday = startTimeStr.substring(8, 10).toInt();
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startTm.tm_hour = startTimeStr.substring(11, 13).toInt();
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startTm.tm_min = startTimeStr.substring(14, 16).toInt();
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endTm.tm_year = endTimeStr.substring(0, 4).toInt() - 1900;
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endTm.tm_mon = endTimeStr.substring(5, 7).toInt() - 1;
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endTm.tm_mday = endTimeStr.substring(8, 10).toInt();
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endTm.tm_hour = endTimeStr.substring(11, 13).toInt();
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endTm.tm_min = endTimeStr.substring(14, 16).toInt();
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time_t start = mktime(&startTm);
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time_t end = mktime(&endTm);
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return (now >= start && now <= end);
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}
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void Gui::showCalendar(calendarData *calendar)
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{
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inkplate.clearDisplay();
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// === Top Section (Black Header Box) ===
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inkplate.fillRect(0, 0, 605, 125, 0); // black box
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// Get current time
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struct tm timeInfo;
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if (!getLocalTime(&timeInfo))
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{
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showError("Time not available");
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return;
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}
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inkplate.setFont(&FreeSansBold48pt7b);
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// === Big Date Number (white) ===
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inkplate.setTextColor(7);
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inkplate.setCursor(10, 85);
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inkplate.println(timeInfo.tm_mday);
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inkplate.setFont(&FreeSansBold24pt7b);
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// === Day of the Week (white) ===
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inkplate.setCursor(125, 50);
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inkplate.println(getDayName(timeInfo.tm_wday));
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// === Month + Year (white) ===
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inkplate.setCursor(125, 100);
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inkplate.println(getMonthName(timeInfo.tm_mon) + " " + String(1900 + timeInfo.tm_year));
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// === Last Updated Section (Top Right) ===
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inkplate.setFont(&FreeSans12pt7b);
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inkplate.setCursor(430, 38);
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inkplate.println("Last Updated:");
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char timeString[6]; // HH:MM
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sprintf(timeString, "%02d:%02d", timeInfo.tm_hour, timeInfo.tm_min);
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inkplate.setCursor(510, 60);
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inkplate.println(timeString);
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// === Calendar Events ===
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Event *events = calendar->getEvents();
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int eventCount = calendar->getEventCount();
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int y = 150;
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int x = 100;
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String lastDate = "";
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int counter = 0;
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for (int i = 0; i < eventCount; i++)
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{
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inkplate.setFont(&FreeSans18pt7b);
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inkplate.setTextColor(0); // black text again
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String eventDate = formatDate(events[i].startTime);
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// Draw section header if date changes
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if (eventDate != lastDate)
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{
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y += 50;
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// Get day of week from date string (assumes format "YYYY-MM-DD")
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struct tm timeStruct = {};
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timeStruct.tm_year = timeInfo.tm_year; // use current year as fallback
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timeStruct.tm_mon = timeInfo.tm_mon; // use current month as fallback
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timeStruct.tm_mday = eventDate.toInt(); // parse day from string
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mktime(&timeStruct); // normalize to fill in wday
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// Date (big, bold)
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inkplate.setFont(&FreeSans18pt7b);
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inkplate.setTextColor(0);
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inkplate.setCursor(10, y);
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inkplate.println(eventDate);
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// Short Day (under date)
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inkplate.setFont(&FreeSans12pt7b);
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inkplate.setCursor(10, y + 30);
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inkplate.println(getShortDayName(timeStruct.tm_wday));
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lastDate = eventDate;
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}
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inkplate.setFont(&FreeSans18pt7b);
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int yLineStart = y;
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int xTime = 480;
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// Highlight if it's happening now
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bool isNow = isCurrentEvent(events[i].startTime, events[i].endTime);
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if (isNow)
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{
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inkplate.fillRoundRect(x - 10, y - 35, 490, 70, 10, 5); // Draw highlight
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String summaryLength = events[i].summary;
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// inkplate.drawLine(x, y + 15, x + summaryLength.length() * 15, y + 15, 0);
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}
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// Draw event summary and time
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inkplate.setCursor(x, y);
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String summary = events[i].summary;
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if (summary.length() > MAX_SUMMARY_LENGTH)
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{
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summary = summary.substring(0, MAX_SUMMARY_LENGTH) + "...";
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}
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inkplate.println(summary);
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inkplate.setCursor(xTime, y);
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inkplate.println(formatHour(events[i].startTime));
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inkplate.setTextColor(2);
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y += 25;
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inkplate.setFont(&FreeSans12pt7b);
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inkplate.setCursor(xTime + 25, y);
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inkplate.println(formatHour(events[i].endTime));
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y += 50;
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// margin drawing
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inkplate.drawLine(70, yLineStart - 43, 70, y - 43, 0);
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inkplate.drawLine(71, yLineStart - 43, 71, y - 43, 0);
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inkplate.drawLine(72, yLineStart - 43, 72, y - 43, 0);
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counter = i;
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if (y >= 725) // Stop drawing if out of vertical space
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{
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break;
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}
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}
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// Show end message
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if (counter == eventCount - 1 && y < 775)
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{
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inkplate.setTextColor(2);
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inkplate.setFont(&FreeSans12pt7b);
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inkplate.setCursor(100, y + 15);
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inkplate.println("No more events in the next 2 weeks!");
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}
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inkplate.display();
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}
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// Shows an error message on the display
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void Gui::showError(const String &message)
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{
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inkplate.clearDisplay();
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inkplate.setTextSize(2);
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inkplate.setTextColor(0);
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inkplate.setCursor(10, 10);
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inkplate.println("Error:");
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inkplate.println(message);
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inkplate.display();
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}

‎examples/Inkplate6/Projects/Inkplate6_Google_Calendar/src/Gui.h‎

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#pragma once
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#include <Inkplate.h>
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#include "calendarData.h"
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#define MAX_SUMMARY_LENGTH 22
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class Gui {
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public:
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Gui(Inkplate &inkplate);
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void showCalendar(calendarData *calendar);
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void showError(const String &message);
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void wifiError();
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private:
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Inkplate &inkplate;
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void drawHeader(const String &title);
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String getDayName(int dayIndex);
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String getMonthName(int monthIndex);
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String formatHour(const String &isoDateTime);
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String formatDate(const String &isoDateTime);
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String getShortDayName(int dayIndex);
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bool isCurrentEvent(const String& startTimeStr, const String& endTimeStr);
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};

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