Simplify Modem Terminal Sketch

examples/ModemTerminal/ModemTerminal.ino

@@ -1,31 +1,31 @@
 #include "ArduinoCellular.h"
 #include "arduino_secrets.h"
 
-
 ArduinoCellular cellular = ArduinoCellular();
 
-float lat = 0.00;
-float lon = 0.00;
-
-
 void setup(){
     Serial.begin(115200);
     while (!Serial);
+    cellular.setDebugStream(Serial); // Uncomment this line to enable debug output
     cellular.begin();
-    cellular.connect(SECRET_GPRS_APN, SECRET_GPRS_LOGIN, SECRET_GPRS_PASSWORD, SECRET_PINNUMBER);
+
+    if(String(SECRET_PINNUMBER).length() > 0 && !cellular.unlockSIM(SECRET_PINNUMBER)){
+        Serial.println("Failed to unlock SIM card.");
+        while(true); // Stop here
+    }
+
+    Serial.println("Connecting...");
+    cellular.connect(SECRET_GPRS_APN, SECRET_GPRS_LOGIN, SECRET_GPRS_PASSWORD);
+    Serial.println("Connected!");
 }
 
 void loop() {
-  if (Serial.available() > 0) {
-    // Define a buffer to store incoming data. Adjust the size as needed.
-    char incomingData[255]; // Adjust the size according to your needs
-
-    // Read data from serial until newline is found
-    int size = Serial.readBytesUntil('\n', incomingData, sizeof(incomingData) - 1); // Leave space for null terminator
-
-    // Null-terminate the string
-    incomingData[size] = '\0';
-    // Call the sendATCommand function with the read data
-    Serial.println(cellular.sendATCommand(GF(incomingData)));
-  }
+  while(Serial.available() == 0); // Wait for user input
+
+  // Read data from serial until newline
+  String userInput = Serial.readStringUntil('\n');
+
+  // Call the sendATCommand function with the read data
+  String response = cellular.sendATCommand(userInput.c_str());
+  Serial.println(response);
 }