added new software serial port

Arduino/platformio.ini

@@ -8,14 +8,12 @@
 ; Please visit documentation for the other options and examples
 ; https://docs.platformio.org/page/projectconf.html
 
-; [env:pro16MHzatmega328]
 [env:nanoatmega328]
 platform = atmelavr
-; board = pro16MHzatmega328
 board = nanoatmega328
 framework = arduino
 lib_deps = 
 	adafruit/Adafruit GFX Library @ ^1.10.1
 	adafruit/Adafruit PCD8544 Nokia 5110 LCD library @ ^1.2.0
 	adafruit/Adafruit BusIO @ ^1.5.0
-	slashdevin/NeoSWSerial@^3.0.5
+	featherfly/SoftwareSerial@^1.0

Arduino/src/main.cpp

@@ -33,12 +33,16 @@
 #include <Adafruit_PCD8544.h>
 #include <Adafruit_GFX.h>
 #include <Adafruit_I2CDevice.h>
+#include <SoftwareSerial.h>
 #include <ft817.h>
 
 // Declarations
 Adafruit_PCD8544 display = Adafruit_PCD8544(7, 6, 5, 4, 3);    // pins for (CLK,DIN,D/C,CE,RST)
 FT817 radio;              // define “radio” so that we may pass CAT and EEPROM commands
 
+// Expansion software serial port: TX = digital pin 12, RX = digital pin 11
+SoftwareSerial expansion(12,11);
+
 // Define PCB pins
 #define backlightPin 8     // backlight output pin (not the "LIGHT" input button!)
 #define buttonPin A0       // SW1-SW6 arrive as different levels on analog input A0
@@ -177,7 +181,10 @@ boolean page2SoftkeyStatus6() {}
 void setup(void) 
 {
   // Start serial
-  radio.begin(38400);        // start the serial port for the CAT library
+  radio.begin(38400);         // start the serial port for the CAT library
+
+  // Start expansion software serial
+  expansion.begin(115200);    // start the expansion serial port at 115200 baud for GPS module
 
   // Set up some pins
   pinMode(backlightPin, OUTPUT);