The question of defining ports

Hi, good catch!

Pin 9 and 10 can be used either as I2C or UART. But at the same time, in a function set, their role is fixed.

The modules are not activated simultaneously. More specifically, Serial2 is typically used by a master device, such as the Raspberry Pi. If a camera is needed, it's usually attached to the Pi rather than connected to the I2C port of the BiBoard.

In the module manager, there's a logic check for the case when both modules are competing for the same port. The previous logic was to make all the modules exclusive. i.e., only one module can be active, and it will turn off the other modules. In a later revision, we excluded the voice and the backtouch sensor from the rule. However, the camera will still force Serial2 to turn off.

void reconfigureTheActiveModule(char *moduleCode) {

  if (moduleCode[0] == '?') {

    showModuleStatus();

    return;

  }

  bool statusChangedQ = false;

  // PTHL("mode", moduleCode); // negative number will deactivate all the modules

  for (byte i = 0; i < sizeof(moduleList) / sizeof(char); i++) {                                               // disable unneeded modules

    if (moduleActivatedQ[i] && moduleList[i] != moduleCode[0]) {                                               // if the modules is active and different from the new module

      if ((moduleList[i] == EXTENSION_VOICE || moduleList[i] == EXTENSION_BACKTOUCH) && moduleCode[0] != '~')  // it won't disable the voice and backtouch

        continue;

      PTHL("- disable", moduleNames[i]);

      stopModule(moduleList[i]);

      moduleActivatedQ[i] = false;

      statusChangedQ = true;

#ifdef I2C_EEPROM_ADDRESS

      i2c_eeprom_write_byte(EEPROM_MODULE_ENABLED_LIST + i, false);

#endif

    }

  }

#ifndef I2C_EEPROM_ADDRESS

  config.putBytes("moduleState", moduleActivatedQ, sizeof(moduleList) / sizeof(char));

#endif

  for (byte i = 0; i < sizeof(moduleList) / sizeof(char); i++) {

    if (moduleList[i] == moduleCode[0] && !moduleActivatedQ[i]) {

      PTHL("+ enable", moduleNames[i]);

      initModule(moduleList[i]);

      statusChangedQ = true;

    }

  }

  if (statusChangedQ)  // if the status of the modules has changed, show the new status

    showModuleStatus();

}