Use with STM32

[Tomas Correa]

Dear All,

I am trying to use this library with STM32. So far, I found that STM32Ethernet has some differences to Arduino Ethernet. In the earlier, accept() is a private function, so we have to call available() instead at this point of ModbusTCPTemplate.h:

while (millis() - taskStart < MODBUSIP_MAX_READMS && (c = tcpserver->available())) {

The issue I am facing now is that the code only comes out of this while with data when the TCP connection is closed (and tcpserver becomes not available).

The solution I found so far was to change the continue keyword to break down in the code, once the tcpclient[n] has been assigned with the currentClient

if (n > -1) {
   tcpclient[n] = currentClient;
   BIT_SET(tcpServerConnection, n);
#if defined(MODBUSIP_DEBUG)
   Serial.print("IP: Conn ");
   Serial.println(n);
#endif
   break; // (BREAK INSTEAD OF CONTINUE while
}

Is this an acceptable solution? Is there any better one?

Best regards,
Tomas

[Alexander Emelianov]

It will work this way without issues.
I've included enhancement you provided as option to the library code.
You may now just uncomment
#define MODBUSIP_USE_AVAILABLE
to use .available() and break implementation instead default one.