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Update RS485.h #58

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@bohnelang bohnelang commented Apr 23, 2025 •
edited by per1234
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Compilation of the library for an ESP32 board fails:

c:\Users\foo\Documents\Arduino\libraries\ArduinoRS485\src\RS485.cpp:209:18: error: 'SERIAL_PORT_HARDWARE' was not declared in this scope
  209 | RS485Class RS485(SERIAL_PORT_HARDWARE, RS485_DEFAULT_TX_PIN, RS485_DEFAULT_DE_PIN, RS485_DEFAULT_RE_PIN);
      |                  ^~~~~~~~~~~~~~~~~~~~

The library only provides a definition of the SERIAL_PORT_HARDWARE macro when compiling for the UNO R4 Minima or UNO R4 WiFi boards:

ArduinoRS485/src/RS485.h

Lines 42 to 43 in 22829af

#elif defined(ARDUINO_UNOR4_WIFI) || defined(ARDUINO_UNOR4_MINIMA)
#define SERIAL_PORT_HARDWARE Serial1

It is expected that the core variant of all other boards will provide a definition of the macro. This is the case for all boards which the library explicitly supports, but not so for some other boards.

I propose to hardcode a definition of SERIAL_PORT_HARDWARE into the library, to allow it to compile for all boards.

@bohnelang
Update RS485.h
612ab7d 
Compiling ModbusLib on an ESP32 board stopp compiling on an compiling error RS485.cpp with  SERIAL_PORT_HARDWARE is not defined.

Here in RS485.cpp is:
#ifdef RS485_SERIAL_PORT
RS485Class RS485(RS485_SERIAL_PORT, RS485_DEFAULT_TX_PIN, RS485_DEFAULT_DE_PIN, RS485_DEFAULT_RE_PIN);
#else
RS485Class RS485(SERIAL_PORT_HARDWARE, RS485_DEFAULT_TX_PIN, RS485_DEFAULT_DE_PIN, RS485_DEFAULT_RE_PIN);
#endif

Thus SERIAL_PORT_HARDWARE should be defined anyhow independently in RS485.h .
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CLAassistant commented Apr 23, 2025 •
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Memory usage change @ 612ab7d

Board flash % RAM for global variables %
arduino:mbed_portenta:envie_m7 N/A N/A N/A N/A
arduino:samd:mkr1000 0 - 0 0.0 - 0.0 0 - 0 0.0 - 0.0
arduino:samd:mkrfox1200 0 - 0 0.0 - 0.0 0 - 0 0.0 - 0.0
arduino:samd:mkrgsm1400 0 - 0 0.0 - 0.0 0 - 0 0.0 - 0.0
arduino:samd:mkrnb1500 0 - 0 0.0 - 0.0 0 - 0 0.0 - 0.0
arduino:samd:mkrvidor4000 0 - 0 0.0 - 0.0 0 - 0 0.0 - 0.0
arduino:samd:mkrwan1300 0 - 0 0.0 - 0.0 0 - 0 0.0 - 0.0
arduino:samd:mkrwan1310 0 - 0 0.0 - 0.0 0 - 0 0.0 - 0.0
arduino:samd:mkrwifi1010 0 - 0 0.0 - 0.0 0 - 0 0.0 - 0.0
arduino:samd:mkrzero 0 - 0 0.0 - 0.0 0 - 0 0.0 - 0.0
arduino:mbed_opta:opta 0 - 0 0.0 - 0.0 0 - 0 0.0 - 0.0
Click for full report table
Board examples/RS485Passthrough
flash		 % examples/RS485Passthrough
RAM for global variables		 % examples/RS485Receiver
flash		 % examples/RS485Receiver
RAM for global variables		 % examples/RS485Sender
flash		 % examples/RS485Sender
RAM for global variables		 %
arduino:mbed_portenta:envie_m7 N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A N/A
arduino:samd:mkr1000 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0
arduino:samd:mkrfox1200 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0
arduino:samd:mkrgsm1400 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0
arduino:samd:mkrnb1500 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0
arduino:samd:mkrvidor4000 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0
arduino:samd:mkrwan1300 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0
arduino:samd:mkrwan1310 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0
arduino:samd:mkrwifi1010 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0
arduino:samd:mkrzero 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0
arduino:mbed_opta:opta 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0 0 0.0
Click for full report CSV 
Board,examples/RS485Passthrough<br>flash,%,examples/RS485Passthrough<br>RAM for global variables,%,examples/RS485Receiver<br>flash,%,examples/RS485Receiver<br>RAM for global variables,%,examples/RS485Sender<br>flash,%,examples/RS485Sender<br>RAM for global variables,%
arduino:mbed_portenta:envie_m7,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A,N/A
arduino:samd:mkr1000,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkrfox1200,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkrgsm1400,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkrnb1500,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkrvidor4000,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkrwan1300,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkrwan1310,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkrwifi1010,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:samd:mkrzero,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0
arduino:mbed_opta:opta,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0,0,0.0

@per1234 per1234 added type: enhancement Proposed improvement topic: code Related to content of the project itself labels Apr 23, 2025
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@bohnelang @CLAassistant @per1234