diff --git a/afsk/main.c b/afsk/main.c
index 2bb8ba99..385bfcc7 100644
--- a/afsk/main.c
+++ b/afsk/main.c
@@ -405,7 +405,7 @@ int main(int argc, char *argv[]) {
   pinMode (onLed, OUTPUT);
   digitalWrite (onLed, onLedOn);
   #ifdef DEBUG_LOGGING
-	printf("Tx LED On\n");
+	printf("Power LED On\n");
   #endif
 	
 //    if ((cycle == ON) && !ax5043)  // don't cycle modes if using AX5043
@@ -415,8 +415,7 @@ int main(int argc, char *argv[]) {
     fprintf(config_file, "%s %d", call, reset_count);
     fclose(config_file);
     config_file = fopen("sim.cfg","r"); 
-	
-	
+		
 if (vB4)
 {	
   sensor[PLUS_X]  = config_sensor("/dev/i2c-1", 0x40, 400); 
@@ -551,11 +550,23 @@ while (loop-- != 0)
    #ifdef DEBUG_LOGGING
       fprintf(stderr,"INFO: Battery voltage: %f V  Battery Threshold %f V\n", batteryVoltage, batteryThreshold);
    #endif	 
-   if ((batteryVoltage > 0) && (batteryVoltage < batteryThreshold))
+   if ((batteryVoltage > 1.0) && (batteryVoltage < batteryThreshold)) // no battery INA219 will give 0V, no battery plugged into INA219 will read < 1V
    {
 	fprintf(stderr,"Battery voltage too low: %f V - shutting down!\n", batteryVoltage);
+  	digitalWrite (txLed, txLedOff);
+        digitalWrite (onLed, onLedOff);
+        sleep(1);
+        digitalWrite (onLed, onLedOn);
+        sleep(1);
+        digitalWrite (onLed, onLedOff);
+        sleep(1);
+        digitalWrite (onLed, onLedOn);
+        sleep(1);
+        digitalWrite (onLed, onLedOff);
+  
 	popen("sudo shutdown -h now > /dev/null 2>&1", "r"); 
-   }
+	sleep(10);
+  }
 			  
   if (mode == FSK) {	
     bitRate = 200;
diff --git a/rpitx.py b/rpitx.py
index bbfecbc4..fc572bfb 100644
--- a/rpitx.py
+++ b/rpitx.py
@@ -27,6 +27,9 @@ os.system("echo 'de " + callsign + "' > id.txt && gen_packets -M 20 id.txt -o mo
 time.sleep(2)
 
 if __name__ == "__main__":
+	
+  if (transmit):
+	
     print 'Length: ', len(sys.argv)
     
     if (len(sys.argv)) > 1:
@@ -44,3 +47,7 @@ if __name__ == "__main__":
     else:
         print("FSK") 
 	os.system("sudo nc -l 8080 | csdr convert_i16_f | csdr gain_ff 7000 | csdr convert_f_samplerf 20833 | sudo /home/pi/rpitx/rpitx -i- -m RF -f 434.9e3")
+  else:
+    print("No Band Pass Filter so no telemetry transmit.  See http://cubesatsim.org/wiki for instructions on how to build the BPF.")
+    while True:
+      time.sleep(5)