 
   // Turn off GSM MOSFET.
   digitalWrite(MOSFET_GSM_PIN, LOW);
-  delay(1000);
+  delay(2000);
 }

// Settings
// -------------------------------
#define SEND_DATA_AFTER_X_READINGS 4
#define SLEEP_CYCLES               4
#define NUM_THERM_READINGS         5

    // 20. Turn off GSM.
    // -----------------

    if (sim900.ensureOffline() == false)
    {
      // TODO(richard-to): What would be best way to handle this issue?
