fix: unlock payload

src/dsp408/mapper/response.rs

@@ -148,7 +148,7 @@ pub fn map_response(frame: &Frame) -> Result<DeviceResponseType, ProtocolError>
             return Err(ProtocolError::new("Missing authentication result"));
         }
 
-        if payload[1] != 0x00 && payload[1] != 0x01 {
+        if payload[0] != 0x00 && payload[1] != 0x01 {
             return Err(ProtocolError::new(format!(
                 "Invalid authentication flag: {:#04x}",
                 payload[1]

src/dsp408/protocol/commands.rs

@@ -99,7 +99,11 @@ pub fn build_get_device_flags() -> Vec<u8> {
 pub fn build_unlock_device(password: &[u8]) -> Result<Vec<u8>, ValidationError> {
     validate_raw_password(password)?;
 
-    Ok(build_frame(0x2d, password))
+    let mut payload = Vec::with_capacity(1 + password.len());
+    payload.push(0x00);
+    payload.extend_from_slice(password);
+
+    Ok(build_frame(0x2d, &payload))
 }
 
 // Command 0x2F