Resolve #19 - add AT_RESPONSE_LOOP_DELAY

Author: PaulZC

src/IridiumSBD.cpp

@@ -947,6 +947,8 @@ bool IridiumSBD::waitForATResponse(char *response, int responseSize, const char
             matchTerminatorPos = c == terminator[0] ? 1 : 0;
          }
       } // while (filteredavailable() > 0)
+
+      delay(AT_RESPONSE_LOOP_DELAY); // Resolve #19
    } // timer loop
    return false;
 }

src/IridiumSBD.h

@@ -221,7 +221,8 @@ class IridiumSBD
    int sendReceiveTimeout;
    int startupTimeout;
    unsigned long lastCheck = 0; // The time in millis when the I2C bus was last checked (limits I2C traffic)
-   const uint8_t I2C_POLLING_WAIT_MS = 5; //Limit checking of new characters to every 5 ms (roughly 10 chars at 19200 baud)
+   const unsigned long I2C_POLLING_WAIT_MS = 5; //Limit checking of new characters to every 5 ms (roughly 10 chars at 19200 baud)
+   const unsigned long AT_RESPONSE_LOOP_DELAY = 2; //Resolves #19 - 2 ms (roughly 4 chars at 19200 baud)
 
    // State variables
    int remainingMessages;