Function readKey

src/modules/others/ibutton.cpp:80–105

// ---------------------------------------------------------------------------

static bool readKey(int maxRetries = 20) {
    for (int attempt = 0; attempt < maxRetries; attempt++) {
        if (check(EscPress)) return false;
        if (oneWire->reset() == 0) return false;

        oneWire->write(0x33);
        oneWire->read_bytes(keyBuffer, 8);

        if (bufferCrcValid()) {
            keyLoaded = true;
            return true;
        }

        tft.fillScreen(bruceConfig.bgColor);
        drawMainBorderWithTitle("iButton");
        padprintln("Reading... attempt " + String(attempt + 2));
        padprintln("CRC mismatch, retrying...");
        padprintln("");
        padprintln("Keep key on the contact!");
        delay(100);
    }

    // Retries exhausted — still store what we got
    keyLoaded = true;
    return false;
}

static void writeKey() {
    uint8_t pin = bruceConfigPins.iButton;