Add delay after stopping RTT to allow JLink Remote Server to release connection

Author: PaulFirs

src/bmlab_toolkit/rtt_cli.py

@@ -235,6 +235,8 @@ def rtt_single_device(serial, ip_addr, mcu, programmer_type, reset, timeout, msg
             file_handle.close()
         prog.stop_rtt()
         prog.disconnect_target()
+        # Give JLink Remote Server time to release connection
+        time.sleep(0.5)
 
     if not output_file:
         print("\nDone.")