Отправка по смс температуры и влажности SIM800L + DHT11

#include <SoftwareSerial.h>
#include <DHT.h>

#define DHTPIN 4
#define DHTTYPE DHT11
DHT dht(DHTPIN, DHTTYPE);

SoftwareSerial sim800(10, 11);  // RX, TX

String allowedNumber = "+79123456789";   // ← ваш номер
String codeWord = "temp";                // ← кодовое слово (можно любое)

void setup() {
  Serial.begin(9600);
  sim800.begin(9600);
  dht.begin();
  
  delay(1000);
  sim800.println("AT");
  delay(1000);
  sim800.println("AT+CMGF=1");           // текстовый режим SMS
  delay(1000);
}

void loop() {
  if (sim800.available()) {
    String incoming = sim800.readString();
    Serial.println(incoming);
    
    if (incoming.indexOf("+CMT:") != -1) {
      parseSMS(incoming);
    }
  }
}

void parseSMS(String msg) {
  int quote1 = msg.indexOf('"') + 1;
  int quote2 = msg.indexOf('"', quote1);
  String sender = msg.substring(quote1, quote2);

  int textStart = msg.indexOf("\n", quote2) + 1;
  String text = msg.substring(textStart);
  text.trim();
  text.toLowerCase();

  if (sender == allowedNumber && text == codeWord) {
    float h = dht.readHumidity();
    float t = dht.readTemperature();

    String reply = "Температура: " + String(t) + " C\n";
    reply += "Влажность: " + String(h) + " %";

    sendSMS(sender, reply);
  }
}

void sendSMS(String number, String message) {
  sim800.println("AT+CMGF=1");
  delay(100);
  sim800.println("AT+CMGS=\"" + number + "\"");
  delay(100);
  sim800.print(message);
  delay(100);
  sim800.write(26);  // Ctrl+Z
}

String allowed[] = {"+7912...", "+7923..."};
bool ok = false;
for (int i = 0; i < 2; i++) if (sender == allowed[i]) ok = true;
if (ok && text == codeWord) { ... }