diff --git a/src/lib.rs b/src/lib.rs
index de343d9..c449578 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -97,8 +97,8 @@ pub extern "C" fn rust_main(_argc: c_int, _argv: *const *const c_char) -> c_int
     }
       let device = radio::connect();
       radio::read_image(&matches.free[0]);
-      radio::print_version(device);
-      radio::upload(device, 0);
+      radio::print_version(&device);
+      radio::upload(&device, 0);
       radio::disconnect();
   } else if config_flag {
     let conf_args = matches.free.len();
@@ -115,19 +115,19 @@ pub extern "C" fn rust_main(_argc: c_int, _argv: *const *const c_char) -> c_int
       // Apply text config to image file.
       let device = radio::connect(); //NOTE this changes the semantics of the program
       radio::read_image(&img);
-      radio::print_version(device);
-      radio::parse_config(device, &config_filename);
-      radio::verify_config(device);
-      radio::save_image(device, "device.img");
+      radio::print_version(&device);
+      radio::parse_config(&device, &config_filename);
+      radio::verify_config(&device);
+      radio::save_image(&device, "device.img");
     } else {
       // Update device from text config file.
         let device = radio::connect();
-        radio::download(device, trace_flag);
-        radio::print_version(device);
-        radio::save_image(device, "device.img");
-        radio::parse_config(device, &config_filename);
-        radio::verify_config(device);
-        radio::upload(device, 1);
+        radio::download(&device, trace_flag);
+        radio::print_version(&device);
+        radio::save_image(&device, "device.img");
+        radio::parse_config(&device, &config_filename);
+        radio::verify_config(&device);
+        radio::upload(&device, 1);
         radio::disconnect();
     }
   } else if verify_flag {
@@ -136,8 +136,8 @@ pub extern "C" fn rust_main(_argc: c_int, _argv: *const *const c_char) -> c_int
     }
     // Verify text config file.
     let device = radio::connect();
-    radio::parse_config(device, &matches.free[0]);
-    radio::verify_config(device);
+    radio::parse_config(&device, &matches.free[0]);
+    radio::verify_config(&device);
     radio::disconnect();
   } else if read_flag {
     if matches.free.len() != 0 {
@@ -146,16 +146,16 @@ pub extern "C" fn rust_main(_argc: c_int, _argv: *const *const c_char) -> c_int
 
     // Dump device to image file.
       let device = radio::connect();
-      radio::download(device, trace_flag);
-      radio::print_version(device);
+      radio::download(&device, trace_flag);
+      radio::print_version(&device);
       radio::disconnect();
-      radio::save_image(device, "device.img");
+      radio::save_image(&device, "device.img");
 
     // Print configuration to file.
     let filename = "device.conf";
     println!("Print configuration to file '{}.", filename);
 
-    radio::print_config(device, filename);
+    radio::print_config(&device, filename);
 
   } else if csv_flag {
     if matches.free.len() != 1 {
@@ -163,14 +163,14 @@ pub extern "C" fn rust_main(_argc: c_int, _argv: *const *const c_char) -> c_int
     }
 
     let device = radio::connect();
-    radio::write_csv(device, &matches.free[0]);
+    radio::write_csv(&device, &matches.free[0]);
     radio::disconnect();
   } else {
     if matches.free.len() != 1 {
       print_usage();
     }
     let device = radio::read_image(&matches.free[0]);
-    radio::print_config_to_stdout(device);
+    radio::print_config_to_stdout(&device);
   }
 
   exit(0);
diff --git a/src/radio.rs b/src/radio.rs
index 07229f3..5105ec4 100644
--- a/src/radio.rs
+++ b/src/radio.rs
@@ -5,6 +5,10 @@ use std::process::exit;
 
 include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
 
+pub struct Radio {
+  ptr: *const radio_device_t
+}
+
 #[repr(C)]
 pub struct radio_tab_t {
     ident: *const c_char,
@@ -41,7 +45,7 @@ extern {
 
 /// Connect to the radio via the serial port.
 /// and identify the type of device.
-pub fn connect() -> *const radio_device_t {
+pub fn connect() -> Radio {
   unsafe {
     let mut ident: *const c_char;
     // Try TYT MD family.
@@ -95,7 +99,7 @@ pub fn connect() -> *const radio_device_t {
     println!("Connect to {}", name);
 
     set_active_device(device);
-    return device;
+    return Radio { ptr: device };
   }
 }
 
@@ -113,7 +117,9 @@ pub fn disconnect() {
 }
 
 /// Read firmware image from the device
-pub fn download(device: *const radio_device_t, trace: bool) {
+pub fn download(radio: &Radio, trace: bool) {
+
+  let device = radio.ptr;
 
   if !trace {
     eprint!("Read device: ");
@@ -131,7 +137,8 @@ pub fn download(device: *const radio_device_t, trace: bool) {
 }
 
 /// Write firmware image to the device.
-pub fn upload(device: *const radio_device_t, cont_flag: c_int) {
+pub fn upload(radio: &Radio, cont_flag: c_int) {
+  let device = radio.ptr;
   unsafe {
     radio_upload(device, cont_flag)
   }
@@ -160,22 +167,25 @@ pub fn list() {
 }
 
 /// Check the configuration.
-pub fn verify_config(device: *const radio_device_t) {
+pub fn verify_config(radio: &Radio) {
+  let device = radio.ptr;
   unsafe {
     radio_verify_config(device);
   }
 }
 
 /// Read firmware image from the binary file.
-pub fn read_image(filename: &str) -> *const radio_device_t {
+pub fn read_image(filename: &str) -> Radio {
   let filename = CString::new(filename.to_string()).unwrap();
-  unsafe {
+  let ptr = unsafe {
     radio_read_image(filename.as_ptr())
-  }
+  };
+  Radio { ptr }
 }
 
 /// Save firmware image to the binary file.
-pub fn save_image(device: *const radio_device_t, filename: &str) {
+pub fn save_image(radio: &Radio, filename: &str) {
+  let device = radio.ptr;
   let filename = CString::new(filename.to_string()).unwrap();
   unsafe {
     radio_save_image(device, filename.as_ptr())
@@ -183,7 +193,8 @@ pub fn save_image(device: *const radio_device_t, filename: &str) {
 }
 
 /// Read the configuration from text file, and modify the firmware.
-pub fn parse_config(device: *const radio_device_t, filename: &str) {
+pub fn parse_config(radio: &Radio, filename: &str) {
+  let device = radio.ptr;
   let filename = CString::new(filename.to_string()).unwrap();
   unsafe {
     radio_parse_config(device, filename.as_ptr())
@@ -191,18 +202,20 @@ pub fn parse_config(device: *const radio_device_t, filename: &str) {
 }
 
 /// Print full information about the device configuration.
-pub fn print_config(device: *const radio_device_t, filename: &str) {
+pub fn print_config(radio: &Radio, filename: &str) {
+  let device = radio.ptr;
   let file = std::fs::File::create(filename).unwrap();
   let fd = file.as_raw_fd();
   let mode = CString::new("w").unwrap();
   unsafe {
-    let file =libc::fdopen(fd, mode.as_ptr());
+    let file = libc::fdopen(fd, mode.as_ptr());
     radio_print_config(device, file, 1);
     libc::fclose(file);
   }
 }
 
-pub fn print_config_to_stdout(device: *const radio_device_t) {
+pub fn print_config_to_stdout(radio: &Radio) {
+  let device = radio.ptr;
   let mode = CString::new("w").unwrap();
   unsafe {
     let stdout = libc::fdopen(libc::STDOUT_FILENO, mode.as_ptr());
@@ -216,7 +229,8 @@ pub fn print_config_to_stdout(device: *const radio_device_t) {
 }
 
 /// Print generic information about the device.
-pub fn print_version(device: *const radio_device_t) {
+pub fn print_version(radio: &Radio) {
+  let device = radio.ptr;
   let mode = CString::new("w").unwrap();
   unsafe {
     radio_print_version(device, libc::fdopen(libc::STDOUT_FILENO, mode.as_ptr()));
@@ -224,7 +238,8 @@ pub fn print_version(device: *const radio_device_t) {
 }
 
 /// Update CSV contacts database.
-pub fn write_csv(device: *const radio_device_t, filename: &str) {
+pub fn write_csv(radio: &Radio, filename: &str) {
+  let device = radio.ptr;
   let filename = CString::new(filename.to_string()).unwrap();
   unsafe {
     radio_write_csv(device, filename.as_ptr());