diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..fd00045
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,22 @@
+MIT License
+
+Copyright (c) 2024 Veles Labs s.r.o.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
diff --git a/modbus.c b/modbus.c
index 1b03d13..938cc98 100644
--- a/modbus.c
+++ b/modbus.c
@@ -1,8 +1,34 @@
 /*
- * modbus.c
+ * File:        modbus.c
+ * Description: MODBUS RTU library
+ * Author:      Jan Mrna
+ * Date:        2021-07-18
+ *
+ * Modbus slave RTU library (does NOT support ASCII and TCP)
+ *
+ * Note that byte order is big endian.
+ *
+ *
+ * Copyright (c) 2024 Veles Labs s.r.o.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
  *
- *  Created on: Jul 18, 2021
- *      Author: user
  */
 
 #include "modbus.h"
diff --git a/modbus.h b/modbus.h
index ff01f65..a619591 100644
--- a/modbus.h
+++ b/modbus.h
@@ -1,37 +1,33 @@
 /*
- * modbus.h
+ * File:        modbus.h
+ * Description: MODBUS RTU library
+ * Author:      Jan Mrna
+ * Date:        2021-07-18
  *
- *  Created on: Jul 18, 2021
- *      Author: user
+ * Modbus slave RTU library (does NOT support ASCII and TCP)
  *
- *  Modbus slave RTU library (does NOT support ASCII and TCP)
+ * Note that byte order is big endian.
  *
- *  Useful links:
- *  https://www.picotech.com/library/oscilloscopes/modbus-serial-protocol-decoding
- *  https://ipc2u.com/articles/knowledge-base/modbus-rtu-made-simple-with-detailed-descriptions-and-examples/
- *  https://modbus.org/docs/Modbus_over_serial_line_V1_02.pdf
- *  https://www.modbus.org/docs/Modbus_Application_Protocol_V1_1b.pdf
  *
- *  Note that byte order is big endian.
+ * Copyright (c) 2024 Veles Labs s.r.o.
  *
- * USAGE:
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
  *
- * 1) Implement functions modbus_callback_function() and modbus_uart_transmit_function()
- *      - modbus_uart_transmit_function() sends data via UART
- *      - modbus_callback_function() does the real work: read sensors, set outputs...
- *        note that when filling buffers (e.g. input_registers[]) user must
- *        ensure that all data is big-endian
- *    These functions are implementation-specific.
- * 2) Set device address (variable modbus_device_address); you can do this either
- *      - setting modbus_device_address directly (modbus.h needs to be included, duh)
- *      - using modbus_set_device_address(uint8_t address) function
- *    Or you can leave address as-is (MODBUS_DEFAULT_SLAVE_ADDRESS) and set it via
- *    Modbus during runtime
- * 3) Call modbus_process_msg() after message reception; you need to observe Modbus RTU timing:
- *      - pauses between chars in frame are less or equal to 1.5 char
- *      - pauses between frames are at least 3.5 chars (of silence)
- *    For more information see section 2.5.1.1 (MODBUS Message RTU Framing)
- *    in "MODBUS over Serial Line: Specification and Implementation Guide"
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
  *
  */