Compiling Error with CONTROLLINO MEGA

[gubely]

Describe the bug We are using simpleRPC on a Controllino MEGA which has worked great so far. Since we updated your library from 2.0.1 to 3.0.0, we receive an compiling error.

To Reproduce We run this code on our Controllino:

 #include <Controllino.h>   Usage of CONTROLLINO library allows you to use CONTROLLINO_xx aliases in your sketch.
#include <simpleRPC.h>

    int i=0;
    const int lowestInputPin = 0;
    const int highestInputPin = 15;
    const int lowestOutputPin = 0;
    const int highestOutputPin = 16;
    int CONTROLLINO_D = 0;
    int CONTROLLINO_A = 0;
    byte pump_speed[11];
    byte flow_raw[11];
byte get_byte_element(byte index) {
  return flow_raw[index];
}
bool set_byte_element(byte index, byte value) {
  pump_speed[index] = value;
  return true;
}
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);//

  // set Inputpins 0 - 15 as analog Inputs:
  for (int thisInputPin = lowestInputPin; thisInputPin <= highestInputPin; thisInputPin++) {
    pinMode(CONTROLLINO_A+thisInputPin, INPUT);
    }
  // set Outputpins 0 - 16 as digital outputs:
  for (int thisOutputPin = lowestOutputPin; thisOutputPin <= highestOutputPin; thisOutputPin++) {
    pinMode(CONTROLLINO_D+thisOutputPin, OUTPUT);
    }
  int  PumpspeedAblauf = 200;
  int  PumpspeedFilter = 150;
  analogWrite(CONTROLLINO_D11, PumpspeedAblauf);                        // abpumpen
  analogWrite(CONTROLLINO_D16, PumpspeedFilter);                        // Filtern
}
void loop() {
  interface(
  digitalRead,
    "digital_read: Read digital pin. @pin: Pin number. @return: Pin value.",
  digitalWrite,
    "digital_write: Write to a digital pin. @pin: Pin number. @value: Pin value.",
  analogRead,
    "analog_read: Read analog pin. @pin: Pin number. @return: Analog value.",
  analogWrite,
    "analog_write: Write to an analog pin (takes 1.2s to proceed). @pin: Pin number. @value: Analog value.",
  get_byte_element,
    "get_byte_element: Reads a byte element from array. @index: index of element. @return: element.",
  set_byte_element,
    "set_byte_element: Writes a byte element into an array. @index: index of element. @value: value of element. @return: acknowledgement.");

  for (i=0; i<=10; i++){
    analogWrite(CONTROLLINO_D0+i, pump_speed[i]);
    flow_raw[i] = analogRead(CONTROLLINO_A0+i);
  }
}

refer to this for the library setup. As we compile this error code occurs:

Arduino: 1.8.13 (Windows 10), Board: "CONTROLLINO MEGA"

In file included from C:\Program Files (x86)\Arduino\libraries\simpleRPC\src/simpleRPC.h:5:0,

                 from ...\arduino\port_extender\port_extender_Pressure\port_extender_Pressure.ino:2:

C:\Program Files (x86)\Arduino\libraries\simpleRPC\src/interface.tcc: In instantiation of void interface(I&, Args ...) [with I = int(unsigned char); Args = {const char*, void (*)(unsigned char, unsigned char), const char*, int (*)(unsigned char), const char*, void (*)(unsigned char, int), const char*, unsigned char (*)(unsigned char), const char*, bool (*)(unsigned char, unsigned char), const char*}]:

...\arduino\port_extender\port_extender_Pressure\port_extender_Pressure.ino:63:139:   required from here

C:\Program Files (x86)\Arduino\libraries\simpleRPC\src/interface.tcc:110:10: error: request for member available in io, which is of non-class type int(unsigned char)

   if (io.available()) {

       ~~~^~~~~~~~~

exit status 1

Error compiling for board CONTROLLINO MEGA.

Expected behavior The error code stated above appears. As we switch back to version 2.0.1 the IDE compiles without any error and all works fine.

Desktop (please complete the following information):

• OS: Windows 10
• Arduino: 1.8.13

[jfjlaros]

This is because the latest version has support for plugins (interfaces other than serial) that need to be passed to the interface() function.

Could you have a look at the latest quick start? Please let me know if anything is unclear.

[gubely]

Thanks for your instant reply. I haven't managed to check your suggested solution, but makes total sense to me.

Thank you!