ESP 32 & Victron VEDirect library - SERIAL problem

Projects General Guidance
1

Hello!
I am trying to use the VEDirectArduino library https://github.com/winginitau/VictronVEDirectArduino with an ESP32 to read the values of a victron MPPT. Issue is this line:

// VEDirect instantiated with relevant serial object
VEDirect myve(Serial3);

No matter what I put there, I will never get it to compile. I tried using the HardwareSerial library, creating an object and using it but also, no luck.

What am I missing?

Thanks for any advice!

2

The first thing is the compiler error report as well as post the entire code.

3

Okay, here is the code, it is basicall the example from the library:

/******************************************************************
 VEDirect Arduino
 Copyright 2018, 2019, Brendan McLearie
 Distributed under MIT license - see LICENSE.txt
 See README.md
 File: ReadVEDirect.ino / ReadVEDirect.cpp
 - Provides example use of the VEDirect library
******************************************************************/

#include "Arduino.h"
#include "VEDirect.h"

// 32 bit ints to collect the data from the device
int32_t VE_soc, VE_power, VE_voltage, VE_current;
// Boolean to collect an ON/OFF value
uint8_t VE_alarm;

// VEDirect instantiated with relevant serial object
VEDirect myve(Serial3);

void setup() {
	Serial.begin(9600);		// Adjust as needed
}

void loop() {
	Serial.println("Reading values from Victron Energy device using VE.Direct text mode");
	Serial.println();

	// Read the data
	if(myve.begin()) {									// test connection
		VE_soc = myve.read(VE_SOC);
		VE_power = myve.read(VE_POWER);
		VE_voltage = myve.read(VE_VOLTAGE);
		VE_current = myve.read(VE_CURRENT);
		VE_alarm = myve.read(VE_ALARM);
	} else {
		Serial.println("Could not open serial port to VE device");
		while (1);
	}

	// Print each of the values
	Serial.print("State of Charge (SOC): ");
	Serial.println(VE_soc, DEC);
	Serial.print("Power:                 ");
	Serial.println(VE_power, DEC);
	Serial.print("Voltage                ");
	Serial.println(VE_voltage, DEC);
	Serial.print("Current                ");
	Serial.println(VE_current, DEC);
	Serial.print("Alarm                  ");
	Serial.println(VE_alarm, DEC);
	Serial.println();

	// Copy the raw data stream (minus the \r) to Serial0
	// Call read() with a token that won't match any VE.Direct labels
	Serial.println("All data from device:");
	myve.read(VE_DUMP);
	Serial.println();
	delay(10000);
}

This is the line giving me problems. I changed from Serial3 to Serial2, neither work

VEDirect myve(Serial2);

The error is:

no matching function for call to 'VEDirect::VEDirect(HardwareSerial&)'

4

Fine. Thanks.

Using the link in Your first post I found this:

Usage:

#include "VEDirect.h" 
VEDirect my_bmv(Serial3); 
my_int32 = my_bmv.read(VE_SOC);

As I can see You have not installed the VEdirect library correctly.

Take a few moments and inspect the Arduino/library. There You should see other libraries. Do You find the VEDirect there?

5

Thank you for your reply! I checked everything and the library was in the /Arduino/library folder - but its name was

VictronVEDirectArduino

I deleted the "Arduino" from the end and recompiled - now it seems to work.
Was that the mistake you saw? And - How could you determine that from just the code? Curious to learn for next time :slight_smile:

6

I didn't guess that, rather that the Victro.... folder was saved somewhere else or installed the wrong way. Copy and paste criss cross the folders might fail...

Well done!

7

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