Compilation Error while moving Arduino IDE to another computer

Development Tools IDE 1.x
1

I am trying to move my Arduino 1.18.6 IDE to another computer. I installed it fresh from your website, have installed all the libraries I had in my previous computer and then when I tried to compile one of my current programs that uses a specific structure for a 'Serial' command I end up getting this error

"C:\Users\abasa\Dropbox\LaserSquash\Programs\client-with-wifi_tinymqtt\client-with-wifi_tinymqtt.ino: In function 'void onPublishA(const MqttClient*, const Topic&, const char*, size_t)':
client-with-wifi_tinymqtt:45:10: error: no match for 'operator<<' (operand types are 'HardwareSerial' and 'const char [23]')
{ Serial << "--> client A received " << topic.c_str() << ", " << payload << ", " << millis()<< endl; }"

The MQTT example program is below.. and every instruction with the "Serial <<" fails with identical errors.

#include <TinyMqtt.h> // GitHub - hsaturn/TinyMqtt: ESP 8266 / 32 / WROOM Small footprint Mqtt Broker and Client

/**

  • Local broker that accept connections and two local clients
  • +-----------------------------+
  • | ESP |
  • | +--------+ | 1883 <--- External client/s
  • | +-------->| broker | | 1883 <--- External client/s
  • | | +--------+ |
  • | | ^ |
  • | | | |
  • | | | | -----
  • | v v | ---
  • | +----------+ +----------+ | -
  • | | internal | | internal | +-------* Wifi
  • | | client | | client | |
  • | +----------+ +----------+ |
  • | |
  • +-----------------------------+
  • pros - Reduces internal latency (when publish is received by the same ESP)
  •  - Reduces wifi traffic

  •  - No need to have an external broker

  •  - can still report to a 'main' broker (TODO see documentation that have to be written)

  •  - accepts external clients
  • cons - Takes more memory
  •  - a bit hard to understand

*/

const char* ssid = "abcdedfdaf";
const char* password = "daddfddda";

std::string topic="testTopic";

MqttBroker broker(1883);

MqttClient mqtt_a(&broker);
MqttClient mqtt_b(&broker);

void onPublishA(const MqttClient* /* source /, const Topic& topic, const char payload, size_t /* length */)
{ Serial << "--> client A received " << topic.c_str() << ", " << payload << ", " << millis()<< endl; }

void onPublishB(const MqttClient* /* source /, const Topic& topic, const char payload, size_t /* length */)
{ Serial << "--> client B Received " << topic.c_str() << ", " << payload << ", " << millis()<< endl; }

void setup()
{
Serial.begin(115200);
delay(500);
Serial << "Clients with wifi " << endl;

if (strlen(ssid)==0)
	Serial << "****** PLEASE EDIT THE EXAMPLE AND MODIFY ssid/password *************" << endl;

// WiFi.mode(WIFI_STA); //This was the example code and I changed to WIFI_AP_STA) for the ESP32
WiFi.mode(WIFI_AP_STA);
WiFi.begin(ssid, password);

while (WiFi.status() != WL_CONNECTED) { Serial << '-'; delay(500); }

Serial << "Connected to " << ssid << "IP address: " << WiFi.localIP() << endl;
Serial << "Gateway IP address: " << WiFi.gatewayIP() << endl;
Serial << "SubnetMask address: " << WiFi.subnetMask() << endl;
Serial << "Mac address: " << WiFi.macAddress() << endl;

broker.begin();

mqtt_a.setCallback(onPublishA);
mqtt_a.subscribe(topic);

mqtt_b.setCallback(onPublishB);
mqtt_b.subscribe(topic);
}

void loop()
{
broker.loop(); // Don't forget to add loop for every broker and clients

mqtt_a.loop();
mqtt_b.loop();

// ============= client A publish ================
static const int intervalA = 5000; // publishes every 5s (please avoid usage of delay())
static uint32_t timerA = millis() + intervalA;

if (millis() > timerA)
{
Serial << "A is publishing " << topic.c_str() << endl;
timerA += intervalA;
mqtt_a.publish(topic, " sent by A");
}

// ============= client B publish ================
static const int intervalB = 7000; // will send topic each 7s
static uint32_t timerB = millis() + intervalB;

if (millis() > timerB)
{
static int temperature;
Serial << "B is publishing " << topic.c_str() << endl;
timerB += intervalB;
mqtt_b.publish(topic, " sent by B: "+std::string(String(16+temperature++%6).c_str()));
}
}

As this program is in Dropbox, I can still compile it successfully in my old Laptop. Can someone help with what the source of this error is?

2

Please follow the advice given in the link below when posting code, in particular the section entitled 'Posting code and common code problems'

Use code tags (the </> icon above the compose window) to make it easier to read and copy for examination

3

you haven't included header that overloads <<

4

Can you please explain what you mean by including header that overloads << ?

5

You seem to have installed an MQTT library for ESP32 and ESP8266 processors. What model Arduino are you using?

6

I am using a ESP32 module right now.

7

Did you install the same version of ESP32 support that you have on the working machine?

8

Hi John: Yes I did. I followed the libraries installed on my old computer and matched them on my new computer.

9

Have you got the same version of the ESP32 boards files installed ?

10

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