diff --git a/src/radio.rs b/src/radio.rs
index c29976d..20425a0 100644
--- a/src/radio.rs
+++ b/src/radio.rs
@@ -64,23 +64,23 @@ unsafe fn set_active_device(d: *const radio_device_t) {
 /// Connect to the radio via the serial port.
 /// and identify the type of device.
 pub fn connect() -> Radio {
-  unsafe {
+
+  let ident_str = {
     let mut ident: *const c_char;
     // Try TYT MD family.
-    ident = dfu_init(0x0483, 0xdf11);
+    ident = unsafe { dfu_init(0x0483, 0xdf11) };
     if ident.is_null() {
       // Try RD-5R, DM-1801 and GD-77.
-      if hid_init(0x15a2, 0x0073) >= 0 {
-        ident = hid_identify();
+      if unsafe { hid_init(0x15a2, 0x0073) } >= 0 {
+        ident = unsafe { hid_identify() };
       }
     }
-
     if ident.is_null() {
       // Try AT-D868UV.
       let trace_flag = false; //TODO fix
       if let Some(device_path) = crate::serial::serial_init(0x28e9, 0x018a, trace_flag) {
         let ptr = device_path.as_ptr() as *mut c_char;
-        ident = serial_identify(ptr);
+        ident = unsafe { serial_identify(ptr) };
       }
     }
 
@@ -90,7 +90,10 @@ pub fn connect() -> Radio {
         exit(-1);
     }
 
-    let ident_str = CStr::from_ptr(ident).to_str().unwrap();
+    unsafe { CStr::from_ptr(ident).to_str().unwrap().to_string() }
+  };
+
+  unsafe {
 
     let mut device: *const radio_device_t = std::ptr::null();