4.1.0 release

- Fix TransactionId
- Misc documentation fixes

README.md

@@ -47,7 +47,7 @@ For more information about Modbus see:
 ## Last Changes
 
 ```diff
-// 4.1.0-RC1
+// 4.1.0
 + API: Raw Modbus frame processing functionality
 + ModbusRTU: Precise inter-frame interval control
 + Examples: True ModbusRTU to ModbusTCP Server bridge
@@ -60,7 +60,28 @@ For more information about Modbus see:
 + ModbusRTU: Add separate RE/DE pins control optional feature
 + API: Drop support of Ethernet library v1
 + Examples: Teknic ClearCore ArduinoWrapper examples added
++ Examples: ModbusTCP to ModbusRTU example added
 + ModbusRTU: Flush extra delay optional feature
+// 4.0.0
++ Support of all Arduino boards
++ ModbusTLS: ESP8266 Client/Server and ESP32 Client
++ ModbusTCP: ModbusEthernet - WizNet W5x00, ENC28J60 Ethernet library support
++ 0x14 - Read File Records function
++ 0x15 - Write File Records function
++ Examples: FW update over Modbus fullfunctional example
++ 0x16 - Write Mask Register function+ Test: 0x16
++ 0x17 - Read/Write Registers function
++ ModbusRTU: ESP32 SoftwareSerial support
++ Build with no STL dependency (switchable)
++ API: ModbusIP => ModbusTCP
++ API: Access control callback for individual Modbus function
++ API: Master/Slave => Client/Server according to [PRESS RELEASE](https://modbus.org/docs/Client-ServerPR-07-2020-final.docx.pdf)
++ Lot of code refacting and small fixes
+```
+
+## Roadmap
+
+```diff
 // 4.2.0-DEV
 - API: Alternative CRC calulation (reduced memory footprint)
 - ModbusRTU: Static buffer allocation
@@ -82,23 +103,7 @@ For more information about Modbus see:
 - API: Extend API to allow custom Modbus commands
 - Examples: Basic file operations
 - Examples: Revising
-// 4.0.0
-+ Support of all Arduino boards
-+ ModbusTLS: ESP8266 Client/Server and ESP32 Client
-+ ModbusTCP: ModbusEthernet - WizNet W5x00, ENC28J60 Ethernet library support
-+ 0x14 - Read File Records function
-+ 0x15 - Write File Records function
-+ Examples: FW update over Modbus fullfunctional example
-+ 0x16 - Write Mask Register function+ Test: 0x16
-+ 0x17 - Read/Write Registers function
-+ ModbusRTU: ESP32 SoftwareSerial support
-+ Build with no STL dependency (switchable)
-+ API: ModbusIP => ModbusTCP
-+ API: Access control callback for individual Modbus function
-+ API: Master/Slave => Client/Server according to [PRESS RELEASE](https://modbus.org/docs/Client-ServerPR-07-2020-final.docx.pdf)
-+ Lot of code refacting and small fixes
 ```
-
 ## Contributions
 
 https://github.com/emelianov/modbus-esp8266

examples/Bridge/README.md

@@ -8,7 +8,7 @@ Basic 'Bridge'. Indeed this sample pulling data from Modbus Server and stores it
 
 Fullfunctional ModbusRTU to ModbusTCP bridge.
 
-## [Multiple Server ID](MultipeServerID/MultipeServerID.ino)
+## [Multiple Server ID](MultipleServerID/MultipleServerID.ino)
 
 Respond for multiple ModbusRTU IDs from single device
 

examples/README.md

@@ -24,7 +24,7 @@ Examples of using callback functions.
 
 Modbus file operations examples.
 
-## [ModbusRTU to ModbusTCP bridge and related functions](bridge)
+## [ModbusRTU to ModbusTCP bridge and related functions](Bridge)
 
 Very basic example of accessing ModbusRTU slave device connected to ESP8266/ESP32 via ModbusTCP server.
 

library.properties

@@ -1,5 +1,5 @@
 name=modbus-esp8266
-version=4.1.0-RC1
+version=4.1.0
 author=Andre Sarmento Barbosa, Alexander Emelianov
 maintainer=Alexander Emelianov<[email protected]>
 sentence=Modbus Library for Arduino. ModbusRTU, ModbusTCP and ModbusTCP Security

src/ModbusTCPTemplate.h

@@ -387,9 +387,6 @@ uint16_t ModbusTCPTemplate<SERVER, CLIENT>::send(IPAddress ip, TAddress startreg
 	_MBAP.protocolId	= __swap_16(0);
 	_MBAP.length		= __swap_16(_len+1);     //_len+1 for last byte from MBAP
 	_MBAP.unitId		= unit;
-	transactionId++;
-	if (!transactionId)
-		transactionId = 1;
 	bool writeResult;
 	{	// for sbuf isolation
 		size_t send_len = _len + sizeof(_MBAP.raw);
@@ -413,6 +410,9 @@ uint16_t ModbusTCPTemplate<SERVER, CLIENT>::send(IPAddress ip, TAddress startreg
 		_frame = nullptr;
 	}
 	result = transactionId;
+	transactionId++;
+	if (!transactionId)
+		transactionId = 1;
 	cleanup:
 	free(_frame);
 	_frame = nullptr;