Compatibility problem with Arduino Due about pzem-004t-v30 HOT 6 OPEN

Hi there, sorry, I don't have an Arduino Due so I can't have a look at this. Maybe someone else can help?

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Hello, I have the same problem, the problem is as follows:

arduino_due_x/variant.h:251:18: error: 'Serial' has a previous declaration as 'UARTClass Serial'
extern UARTClass Serial;
invalid conversion from 'int' to 'HardwareSerial*' [-fpermissive]

you can see the problem by compiling with the IDE configured on a due card.
Please take a look if you have a few minutes. I want to connect several Pzem on a Due, the mega is not powerful enough for the web interface...

Thank you!

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Has anyone found a solution, or work around? Is this issues still relevant?

from pzem-004t-v30.

Hi,

Unfortunately the problem has not been resolved.
Please help to implement compatibility with DUE.
It is very necessary!

Thank you!

from pzem-004t-v30.

This issue might be related to #39 It looks like the workaround for using both hardware and software serial is not completely compatible with all boards. Further investigation is required thought.

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Newbie, here. pzem017v1 library (for PZEM-017 DC meter) is identical to pzem004t30 except for specific data addresses. So this should apply. For pzem017v1 DUE compatibility I took inspiration from ModbusMaster library; it uses Stream instead of HardwareSerial; it separates initialization (outside of setup()) from begin() (inside setup). This works...except that oddly I get occasional random read errors (no problem when using ModbusMaster). Still investigating. This is what I did:

In PZEM017v1.cpp replace class initialization and add new begin() member:

//extern HardwareSerial Serial;  // Commented out for DUE

/*
PZEM017v1::PZEM017v1(HardwareSerial* port, uint8_t addr) // Commented out for DUE
{
    port->begin(PZEM_BAUD_RATE, SERIAL_8N2);
    this->_serial = &port;
    this->_isSoft = false;
    init(addr);
}
*/

PZEM017v1::PZEM017v1(void)
{
}

void PZEM017v1::begin(uint8_t slaveAddr, Stream &serial)
{
    _serial = &serial;
    init(slaveAddr);
}

In pzem017v1.h:

    //PZEM017v1(HardwareSerial* port, uint8_t addr=PZEM_DEFAULT_ADDR);
    PZEM017v1(void); // changed for DUE

    void begin(uint8_t slaveAddr, Stream &serial); //  added

In .ino:

//PZEM017v1 pzem(&Serial3, slaveAddr);
PZEM017v1 pzem;

setup() {
  Serial3.begin(9600, SERIAL_8N2);
  pzem.begin(slaveAddr, Serial3);

...

I think that's it.

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