Change the timing of beginSerialPort

Author: PaulZC

library.properties

@@ -1,5 +1,5 @@
 name=IridiumSBDi2c
-version=3.0.4
+version=3.0.5
 author=Mikal Hart and Paul Clark (PaulZC)
 maintainer=SparkFun Electronics <sparkfun.com>
 sentence=This library supports satellite data transmissions from anywhere on earth using the RockBLOCK family of Iridium 9602 and 9603 modems.

src/IridiumSBD.cpp

@@ -546,16 +546,16 @@ int IridiumSBD::internalBegin()
 
    power(true); // power on
 
-   if (this->useSerial) // If we are using Serial
-      beginSerialPort(); // Apollo3 v2.1 Serial fix
-
    bool modemAlive = false;
 
    unsigned long startupTime = 500; //ms
    for (unsigned long start = millis(); millis() - start < startupTime;)
       if (cancelled())
          return ISBD_CANCELLED;
 
+   if (this->useSerial) // If we are using Serial
+      beginSerialPort(); // Apollo3 v2.1 Serial fix - begin the Serial port 500ms after power(true)
+
    // Turn on modem and wait for a response from "AT" command to begin
    for (unsigned long start = millis(); !modemAlive && millis() - start < 1000UL * this->startupTimeout;)
    {