Initial Commit

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2025-07-01 18:20:48 +02:00
commit e80990c521
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src/main.cpp Normal file
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#undef ARDUINO_M5STACK_FIRE
#define ARDUINO_M5STACK_Paper
#define YAML_DISABLE_CJSON
#include <ArduinoJson.h>
#include <ArduinoYaml.h>
#include <WiFi.h>
#include <M5EPD.h>
#include <NTPClient.h>
#include <HTTPClient.h>
#include <PubSubClient.h>
// https://github.com/Netthaw/TOTP-MCU
#include "totp.h"
#define LGFX_M5PAPER
#define LGFX_USE_V1
#define LGFX_AUTODETECT
#include <LovyanGFX.hpp>
static LGFX gfx;
static WiFiUDP ntpUDP;
static NTPClient timeClient(ntpUDP);
constexpr float FONT_SIZE_NORMAL = 4.0;
constexpr float FONT_SIZE_LARGE = 8.0;
static YAMLNode *SETTINGS = nullptr;
static String oldinput = "";
static String input = "";
static int last_index = -1;
static bool is_disarmed = false;
static const int WIFI_CONNECT_RETRY_MAX = 30;
static const float_t BUTTON_WIDTH = 115;
static const float_t BUTTON_HEIGHT = 115;
void drawLockState(String state)
{
state.replace("_", " ");
gfx.setTextSize(FONT_SIZE_NORMAL);
gfx.setColor(TFT_WHITE);
gfx.fillRect(405, 155, gfx.fontWidth() * 10, gfx.fontHeight());
gfx.setColor(TFT_BLACK);
gfx.setCursor(405, 155);
state[0] = toupper(state[0]);
gfx.printf("%s", state);
}
void mqtt_callback(char *topic, byte *payload, unsigned int length)
{
String state;
for (int i = 0; i < length; i++)
{
state += (const char)payload[i];
}
is_disarmed = state == "disarmed";
Serial.printf("%d: %s - %s\n", length, topic, state);
drawLockState(state);
}
WiFiClient wifiClient;
PubSubClient *client = nullptr;
void cls()
{
gfx.setEpdMode(epd_mode_t::epd_quality);
gfx.fillScreen(TFT_WHITE);
gfx.waitDisplay();
gfx.fillScreen(TFT_WHITE);
gfx.setEpdMode(epd_mode_t::epd_fast);
gfx.setColor(TFT_BLACK);
gfx.waitDisplay();
}
void drawButton(int index, String label)
{
float_t x = (125 * (index % 3)) + 15;
float_t y = (125 * (index / 3)) + 20;
gfx.setCursor(x + (115 / 2) - (gfx.fontWidth() / 2), y + (115 / 2) - (gfx.fontHeight() / 2));
gfx.print(label);
gfx.setColor(TFT_BLACK);
gfx.drawFastHLine(x, y, BUTTON_WIDTH);
gfx.drawFastHLine(x, y + BUTTON_HEIGHT, BUTTON_WIDTH);
gfx.drawFastVLine(x, y, BUTTON_HEIGHT);
gfx.drawFastVLine(x + BUTTON_WIDTH, y, BUTTON_HEIGHT);
}
void drawButtons()
{
gfx.setTextSize(FONT_SIZE_NORMAL);
for (int i = 0; i <= 11; i++)
{
String label = String(i + 1);
if (i == 9)
{
label = String("<");
}
if (i == 10)
{
label = String("0");
}
if (i == 11)
{
label = String(">");
}
drawButton(i, label);
}
}
void drawInputField()
{
int x = 405;
int y = 20;
gfx.setColor(TFT_BLACK);
gfx.drawFastHLine(x, y, 520);
gfx.drawFastHLine(x, y + 115, 520);
gfx.drawFastVLine(x, y, 115);
gfx.drawFastVLine(x + 520, y, 115);
}
void drawInput()
{
int x = 405;
int y = 20;
gfx.setColor(TFT_WHITE);
gfx.fillRect(x + 1, y + 1, 519, 114);
gfx.setColor(TFT_BLACK);
gfx.setEpdMode(epd_mode_t::epd_text);
gfx.setColor(TFT_BLACK);
gfx.setTextSize(FONT_SIZE_LARGE);
gfx.setCursor(x + (520 / 2) - ((gfx.fontWidth() * input.length()) / 2), y + (115 / 2) - (gfx.fontHeight() / 2));
String display = "";
for (int i = 0; i < input.length(); i++)
{
display += "*";
}
gfx.print(display);
gfx.setEpdMode(epd_mode_t::epd_fast);
}
void setupTime()
{
timeClient.begin();
}
void send(String state)
{
if (SETTINGS == nullptr)
{
return;
}
if (client->connect(SETTINGS->gettext("mqtt:ident"), SETTINGS->gettext("mqtt:username"), SETTINGS->gettext("mqtt:password")))
{
client->unsubscribe(SETTINGS->gettext("mqtt:state_topic"));
client->subscribe(SETTINGS->gettext("mqtt:state_topic"));
client->publish(SETTINGS->gettext("mqtt:command_topic"), state.c_str());
}
}
void lock()
{
if (is_disarmed)
{
send("ARM_AWAY");
}
}
void unlock()
{
send("DISARM");
}
bool isConnecting = false;
void resetWifi()
{
if (!SETTINGS)
{
return;
}
if (isConnecting)
{
return;
}
isConnecting = true;
drawLockState("connecting");
WiFi.begin(SETTINGS->gettext("wifi:ssid"), SETTINGS->gettext("wifi:password"));
if (WiFi.isConnected())
{
WiFi.disconnect();
}
Serial.print("Connecting to Wi-Fi network");
for (int cnt_retry = 0; cnt_retry < WIFI_CONNECT_RETRY_MAX && !WiFi.isConnected();
cnt_retry++)
{
delay(500);
Serial.print(".");
}
Serial.println("");
if (WiFi.isConnected())
{
Serial.print("Local IP: ");
Serial.println(WiFi.localIP());
isConnecting = false;
}
else
{
drawLockState("failed to connect");
isConnecting = false;
return;
}
IPAddress ip;
if (!ip.fromString(SETTINGS->gettext("mqtt:hostname")))
{
drawLockState("failed to parse mqtt ip");
isConnecting = false;
return;
}
client = new PubSubClient(ip, 1883, mqtt_callback, wifiClient);
if (client->connect(SETTINGS->gettext("mqtt:ident"), SETTINGS->gettext("mqtt:username"), SETTINGS->gettext("mqtt:password")))
{
client->unsubscribe(SETTINGS->gettext("mqtt:state_topic"));
client->subscribe(SETTINGS->gettext("mqtt:state_topic"));
}
}
bool initSD()
{
if (!SD.exists("/settings.yml"))
{
Serial.println("settings.yml not found");
drawLockState("settings.yml not found");
return false;
}
File settingsFile = SD.open("/settings.yml");
YAMLNode node = YAMLNode::loadStream(settingsFile);
settingsFile.close();
SETTINGS = new YAMLNode(node);
return true;
}
void initTOTP()
{
uint8_t *base32_key = new uint8_t[20];
const char *hmac = ((String)SETTINGS->gettext("totp:hmac")).c_str();
for (int i = 0; i < 20; i++)
{
base32_key[i] = (uint8_t)hmac[i];
}
TOTP(base32_key, 20, 30);
}
void setup()
{
M5.begin();
gfx.init();
gfx.setEpdMode(epd_mode_t::epd_fast);
gfx.setRotation(1);
cls();
drawButtons();
drawInputField();
drawInput();
if (!initSD())
return;
resetWifi();
sleep(1);
setupTime();
initTOTP();
lock();
}
int index(int x, int y)
{
for (int index = 0; index <= 11; index++)
{
float_t cx = (125 * (index % 3)) + 15;
float_t cy = (125 * (index / 3)) + 20;
if (x > cx && x < cx + BUTTON_WIDTH && y > cy && y < cy + BUTTON_HEIGHT)
{
return index;
}
}
return -1;
}
void submit(String code)
{
uint32_t newCode = getCodeFromTimestamp(timeClient.getEpochTime());
uint32_t input = code.toInt();
if (newCode == input)
{
unlock();
return;
}
lock();
}
void checkForInput()
{
if (M5.TP.available())
{
M5.TP.update();
if (M5.TP.isFingerUp())
{
last_index = -1;
return;
}
tp_finger_t fingerItem = M5.TP.readFinger(0);
int i = index(fingerItem.x, fingerItem.y);
if (last_index != i)
{
last_index = i;
if (i == 9)
{
input = input.substring(0, input.length() - 1);
}
else if (i == 10)
{
input += String(0);
}
else if (i == 11)
{
// submit
submit(input);
input = "";
}
else
{
input += String(i + 1);
}
}
}
}
unsigned long lastBtnPressed = millis();
void checkForButton()
{
M5.BtnP.read();
if (M5.BtnP.isPressed() && millis() - lastBtnPressed > 1000)
{
lastBtnPressed = millis(); // try and debouce, not really working i guess
resetWifi();
}
}
void loop()
{
checkForButton();
timeClient.update();
if (client != nullptr)
{
client->loop();
}
checkForInput();
if (oldinput != input)
{
oldinput = input;
drawInput();
}
}