added 's' or 'sstv' parameter

rpitx.py

@@ -38,7 +38,11 @@ if __name__ == "__main__":
             print("AFSK") 
 	    while True:
     		time.sleep(5)
-        elif (('b' == sys.argv[1]) or ('bpsk' in sys.argv[1])):
+        elif (('s' == sys.argv[1]) or ('sstv' in sys.argv[1])):
+            print("SSTV") 
+	    while True:
+    		time.sleep(5)
+	elif (('b' == sys.argv[1]) or ('bpsk' in sys.argv[1])):
             print("BPSK")
 	    os.system("sudo nc -l 8080 | csdr convert_i16_f | csdr fir_interpolate_cc 2 | csdr dsb_fc | csdr bandpass_fir_fft_cc 0.002 0.06 0.01 | csdr fastagc_ff | sudo /home/pi/rpitx/sendiq -i /dev/stdin -s 96000 -f 434.9e6 -t float")
 	else: