add test data

test/send_nmea.py

@@ -0,0 +1,21 @@
+#!/bin/python
+
+import time
+import sys
+import serial
+
+f = open(sys.argv[1], "r")
+ser = serial.Serial(sys.argv[2], 115200, timeout=0)
+
+sleep_count = 0
+for x in f:
+	s = ser.read(100)
+	if s:
+		print(s.decode(), end='')
+	sleep_count = sleep_count + 1
+	ser.write(x.encode())
+	if sleep_count > 2:
+		time.sleep(1)
+		sleep_count = 0
+ser.close()
+f.close()