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LteClass Lte;

String LteClass::getSignalStrength(void) {
    String response = "";
    Serial1.println("AT+CSQ");  // Send AT command to query signal strength

    // Wait for a response from the module
    unsigned long start = millis();
    while ((millis() - start) < 1000) {
        if (Serial1.available()) {
            char c = Serial1.read();
            response += c;
        }
    }

    // Parse response to extract signal strength
    int rssi = -1; // default value if parsing fails
    if (response.startsWith("+CSQ:")) {
        int commaIndex = response.indexOf(',');
        if (commaIndex > 6) {
            String rssiValue = response.substring(6, commaIndex);
            int rssiInt = rssiValue.toInt();
            if (rssiInt >= 0 && rssiInt <= 31) {
                rssi = -113 + (rssiInt * 2);  // Convert CSQ value to dBm
            }
        }
    }

    if (rssi != -1) {
        return String(rssi) + " dBm";
    } else {
        return "Signal strength not available";
    }
}