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knolleary / pubsubclient

A client library for the Arduino Ethernet Shield that provides support for MQTT.
http://pubsubclient.knolleary.net/
MIT License
3.83k stars 1.47k forks source link

no matching function for call to 'PubSubClient: #319

Open sspence65 opened 7 years ago

sspence65 commented 7 years ago

Arduino: 1.8.4 (Linux), Board: "Adafruit HUZZAH ESP8266, 80 MHz, 115200, 4M (3M SPIFFS)"

mqtt_test.ino:21: error: no matching function for call to 'PubSubClient::PubSubClient(WiFiClient&, const char&, const int&)' PubSubClient client(wclient, mqtt_server, mqtt_port); //instanciates client object ^ /home/sspence65/sketchbook/mqtt_test/mqtt_test.ino/mqtt_test.ino.ino:21:53: note: candidates are: In file included from /home/sspence65/sketchbook/mqtt_test/mqtt_test.ino/mqtt_test.ino.ino:2:0: /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:116:4: note: PubSubClient::PubSubClient(const char, uint16_t, std::function<void(char, unsigned char, unsigned int)>, Client&, Stream&) PubSubClient(const char, uint16_t, MQTT_CALLBACK_SIGNATURE,Client& client, Stream&); ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:116:4: note: candidate expects 5 arguments, 3 provided /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:115:4: note: PubSubClient::PubSubClient(const char, uint16_t, std::function<void(char, unsigned char, unsigned int)>, Client&) PubSubClient(const char, uint16_t, MQTT_CALLBACK_SIGNATURE,Client& client); ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:115:4: note: candidate expects 4 arguments, 3 provided /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:114:4: note: PubSubClient::PubSubClient(const char, uint16_t, Client&, Stream&) PubSubClient(const char, uint16_t, Client& client, Stream&); ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:114:4: note: candidate expects 4 arguments, 3 provided /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:113:4: note: PubSubClient::PubSubClient(const char, uint16_t, Client&) PubSubClient(const char, uint16_t, Client& client); ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:113:4: note: no known conversion for argument 1 from 'WiFiClient' to 'const char' /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:112:4: note: PubSubClient::PubSubClient(uint8_t, uint16_t, std::function<void(char, unsigned char, unsigned int)>, Client&, Stream&) PubSubClient(uint8_t , uint16_t, MQTT_CALLBACK_SIGNATURE,Client& client, Stream&); ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:112:4: note: candidate expects 5 arguments, 3 provided /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:111:4: note: PubSubClient::PubSubClient(uint8_t, uint16_t, std::function<void(char, unsigned char, unsigned int)>, Client&) PubSubClient(uint8_t , uint16_t, MQTT_CALLBACK_SIGNATURE,Client& client); ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:111:4: note: candidate expects 4 arguments, 3 provided /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:110:4: note: PubSubClient::PubSubClient(uint8_t, uint16_t, Client&, Stream&) PubSubClient(uint8_t , uint16_t, Client& client, Stream&); ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:110:4: note: candidate expects 4 arguments, 3 provided /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:109:4: note: PubSubClient::PubSubClient(uint8_t, uint16_t, Client&) PubSubClient(uint8_t , uint16_t, Client& client); ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:109:4: note: no known conversion for argument 1 from 'WiFiClient' to 'uint8_t {aka unsigned char}' /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:108:4: note: PubSubClient::PubSubClient(IPAddress, uint16_t, std::function<void(char, unsigned char, unsigned int)>, Client&, Stream&) PubSubClient(IPAddress, uint16_t, MQTT_CALLBACK_SIGNATURE,Client& client, Stream&); ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:108:4: note: candidate expects 5 arguments, 3 provided /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:107:4: note: PubSubClient::PubSubClient(IPAddress, uint16_t, std::function<void(char, unsigned char, unsigned int)>, Client&) PubSubClient(IPAddress, uint16_t, MQTT_CALLBACK_SIGNATURE,Client& client); ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:107:4: note: candidate expects 4 arguments, 3 provided /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:106:4: note: PubSubClient::PubSubClient(IPAddress, uint16_t, Client&, Stream&) PubSubClient(IPAddress, uint16_t, Client& client, Stream&); ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:106:4: note: candidate expects 4 arguments, 3 provided /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:105:4: note: PubSubClient::PubSubClient(IPAddress, uint16_t, Client&) PubSubClient(IPAddress, uint16_t, Client& client); ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:105:4: note: no known conversion for argument 1 from 'WiFiClient' to 'IPAddress' /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:104:4: note: PubSubClient::PubSubClient(Client&) PubSubClient(Client& client); ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:104:4: note: candidate expects 1 argument, 3 provided /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:103:4: note: PubSubClient::PubSubClient() PubSubClient(); ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:103:4: note: candidate expects 0 arguments, 3 provided /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:83:7: note: PubSubClient::PubSubClient(const PubSubClient&) class PubSubClient { ^ /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:83:7: note: candidate expects 1 argument, 3 provided /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:83:7: note: PubSubClient::PubSubClient(PubSubClient&&) /home/sspence65/sketchbook/libraries/PubSubClient/src/PubSubClient.h:83:7: note: candidate expects 1 argument, 3 provided mqtt_test.ino:24: error: 'MQTT' does not name a type void callback(const MQTT::Publish& pub) { ^ mqtt_test.ino:24: error: expected unqualified-id before '&' token void callback(const MQTT::Publish& pub) { ^ mqtt_test.ino:24: error: expected ')' before '&' token mqtt_test.ino:24: error: expected initializer before 'pub' void callback(const MQTT::Publish& pub) { ^ mqtt_test.ino:24: error: 'MQTT' does not name a type void callback(const MQTT::Publish& pub) { ^ mqtt_test.ino:24: error: expected unqualified-id before '&' token void callback(const MQTT::Publish& pub) { ^ mqtt_test.ino:24: error: expected ')' before '&' token mqtt_test.ino:24: error: expected initializer before 'pub' void callback(const MQTT::Publish& pub) { ^ exit status 1 no matching function for call to 'PubSubClient::PubSubClient(WiFiClient&, const char*&, const int&)'

This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences.

knolleary commented 7 years ago

Hi,

The PubSubClient doesn't provide a constructor that matches that signature, hence this error.

What sketch are you trying to build?

Solvarg commented 7 years ago

Hello! I seem to have the same problem (error message as above) building the sketch at: http://www.arjunsk.com/iot/esp8266-programming-cloud-mqtt-part-3/ Any idea what can be wrong?

Thanks Bert

Bagunda commented 6 years ago

I have the same problem (error message as above). Where is the issue?

knolleary commented 6 years ago

@Bagunda are you sure you've installed this library and not a different fork that has changed the callback signature?

How exactly did you install the library?

Bagunda commented 6 years ago

@knolleary Download zip. Unzip folder "pubsubclient-master" to D:\Downloads\Arduino\TestMega_MQTT\libraries. In ArduinoIDE in settings set folder to D:\Downloads\Arduino\TestMega_MQTT\

mainshop commented 6 years ago

E:\Organisasi\Santren Koding\ioT\Coonect geeknesia\nyoba_bisa_Bismillah\nyoba_bisa_Bismillah.ino: In function 'void senddata(char, String, char, String)':

nyoba_bisa_Bismillah:33: error: no matching function for call to 'PubSubClient::publish(const char [9], String&)'

client.publish("iot/data",pubString);

                                 ^

E:\Organisasi\Santren Koding\ioT\Coonect geeknesia\nyoba_bisa_Bismillah\nyoba_bisa_Bismillah.ino:33:37: note: candidates are:

In file included from E:\Organisasi\Santren Koding\ioT\Coonect geeknesia\nyoba_bisa_Bismillah\nyoba_bisa_Bismillah.ino:2:0:

C:\Users\khafiS_Fahrurrozi\Documents\Arduino\libraries\pubsubclient-master\src/PubSubClient.h:130:12: note: boolean PubSubClient::publish(const char, const char)

boolean publish(const char* topic, const char* payload);

        ^

C:\Users\khafiS_Fahrurrozi\Documents\Arduino\libraries\pubsubclient-master\src/PubSubClient.h:130:12: note: no known conversion for argument 2 from 'String' to 'const char*'

C:\Users\khafiS_Fahrurrozi\Documents\Arduino\libraries\pubsubclient-master\src/PubSubClient.h:131:12: note: boolean PubSubClient::publish(const char, const char, boolean)

boolean publish(const char* topic, const char* payload, boolean retained);

        ^

C:\Users\khafiS_Fahrurrozi\Documents\Arduino\libraries\pubsubclient-master\src/PubSubClient.h:131:12: note: candidate expects 3 arguments, 2 provided

C:\Users\khafiS_Fahrurrozi\Documents\Arduino\libraries\pubsubclient-master\src/PubSubClient.h:132:12: note: boolean PubSubClient::publish(const char, const uint8_t, unsigned int)

boolean publish(const char* topic, const uint8_t * payload, unsigned int plength);

        ^

C:\Users\khafiS_Fahrurrozi\Documents\Arduino\libraries\pubsubclient-master\src/PubSubClient.h:132:12: note: candidate expects 3 arguments, 2 provided

C:\Users\khafiS_Fahrurrozi\Documents\Arduino\libraries\pubsubclient-master\src/PubSubClient.h:133:12: note: boolean PubSubClient::publish(const char, const uint8_t, unsigned int, boolean)

boolean publish(const char* topic, const uint8_t * payload, unsigned int plength, boolean retained);

        ^

C:\Users\khafiS_Fahrurrozi\Documents\Arduino\libraries\pubsubclient-master\src/PubSubClient.h:133:12: note: candidate expects 4 arguments, 2 provided

exit status 1 no matching function for call to 'PubSubClient::publish(const char [9], String&)'

udaywankar commented 6 years ago

same issue

error in arduino ide:

Arduino: 1.6.7 (Windows 10), Board: "Generic ESP8266 Module, 80 MHz, ck, 26 MHz, 40MHz, DOUT, 1M (64K SPIFFS), 2, v2 Lower Memory, Disabled, None, Only Sketch, 115200"

WARNING: Spurious .github folder in 'Adafruit MQTT Library' library WARNING: Spurious .github folder in 'Adafruit SGP30 Sensor' library WARNING: Spurious .github folder in 'IRremoteESP8266' library WARNING: Spurious .github folder in 'aREST' library ESPsonoff_4CH-v1.01p.ino:79: error: no matching function for call to 'PubSubClient::PubSubClient(WiFiClient&, const char [14], int)'

PubSubClient mqttClient(wifiClient, MQTT_SERVER, MQTT_PORT);

                                                       ^

F:\NODEMCU PROGRAMS\sonoff\ESPsonoff_4CH-v1.01p\ESPsonoff_4CH-v1.01p.ino\ESPsonoff_4CH-v1.01p.ino.ino:79:59: note: candidates are:

In file included from F:\NODEMCU PROGRAMS\sonoff\ESPsonoff_4CH-v1.01p\ESPsonoff_4CH-v1.01p.ino\ESPsonoff_4CH-v1.01p.ino.ino:29:0:

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:116:4: note: PubSubClient::PubSubClient(const char, uint16_t, std::function<void(char, unsigned char*, unsigned int)>, Client&, Stream&)

PubSubClient(const char*, uint16_t, MQTT_CALLBACK_SIGNATURE,Client& client, Stream&);

^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:116:4: note: candidate expects 5 arguments, 3 provided

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:115:4: note: PubSubClient::PubSubClient(const char, uint16_t, std::function<void(char, unsigned char*, unsigned int)>, Client&)

PubSubClient(const char*, uint16_t, MQTT_CALLBACK_SIGNATURE,Client& client);

^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:115:4: note: candidate expects 4 arguments, 3 provided

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:114:4: note: PubSubClient::PubSubClient(const char*, uint16_t, Client&, Stream&)

PubSubClient(const char*, uint16_t, Client& client, Stream&);

^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:114:4: note: candidate expects 4 arguments, 3 provided

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:113:4: note: PubSubClient::PubSubClient(const char*, uint16_t, Client&)

PubSubClient(const char*, uint16_t, Client& client);

^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:113:4: note: no known conversion for argument 1 from 'WiFiClient' to 'const char*'

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:112:4: note: PubSubClient::PubSubClient(uint8_t, uint16_t, std::function<void(char, unsigned char*, unsigned int)>, Client&, Stream&)

PubSubClient(uint8_t *, uint16_t, MQTT_CALLBACK_SIGNATURE,Client& client, Stream&);

^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:112:4: note: candidate expects 5 arguments, 3 provided

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:111:4: note: PubSubClient::PubSubClient(uint8_t, uint16_t, std::function<void(char, unsigned char*, unsigned int)>, Client&)

PubSubClient(uint8_t *, uint16_t, MQTT_CALLBACK_SIGNATURE,Client& client);

^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:111:4: note: candidate expects 4 arguments, 3 provided

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:110:4: note: PubSubClient::PubSubClient(uint8_t*, uint16_t, Client&, Stream&)

PubSubClient(uint8_t *, uint16_t, Client& client, Stream&);

^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:110:4: note: candidate expects 4 arguments, 3 provided

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:109:4: note: PubSubClient::PubSubClient(uint8_t*, uint16_t, Client&)

PubSubClient(uint8_t *, uint16_t, Client& client);

^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:109:4: note: no known conversion for argument 1 from 'WiFiClient' to 'uint8_t {aka unsigned char}'

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:108:4: note: PubSubClient::PubSubClient(IPAddress, uint16_t, std::function<void(char, unsigned char, unsigned int)>, Client&, Stream&)

PubSubClient(IPAddress, uint16_t, MQTT_CALLBACK_SIGNATURE,Client& client, Stream&);

^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:108:4: note: candidate expects 5 arguments, 3 provided

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:107:4: note: PubSubClient::PubSubClient(IPAddress, uint16_t, std::function<void(char, unsigned char, unsigned int)>, Client&)

PubSubClient(IPAddress, uint16_t, MQTT_CALLBACK_SIGNATURE,Client& client);

^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:107:4: note: candidate expects 4 arguments, 3 provided

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:106:4: note: PubSubClient::PubSubClient(IPAddress, uint16_t, Client&, Stream&)

PubSubClient(IPAddress, uint16_t, Client& client, Stream&);

^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:106:4: note: candidate expects 4 arguments, 3 provided

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:105:4: note: PubSubClient::PubSubClient(IPAddress, uint16_t, Client&)

PubSubClient(IPAddress, uint16_t, Client& client);

^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:105:4: note: no known conversion for argument 1 from 'WiFiClient' to 'IPAddress'

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:104:4: note: PubSubClient::PubSubClient(Client&)

PubSubClient(Client& client);

^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:104:4: note: candidate expects 1 argument, 3 provided

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:103:4: note: PubSubClient::PubSubClient()

PubSubClient();

^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:103:4: note: candidate expects 0 arguments, 3 provided

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:83:7: note: PubSubClient::PubSubClient(const PubSubClient&)

class PubSubClient {

   ^

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:83:7: note: candidate expects 1 argument, 3 provided

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:83:7: note: PubSubClient::PubSubClient(PubSubClient&&)

C:\Users\udayw\Documents\Arduino\libraries\PubSubClient\src/PubSubClient.h:83:7: note: candidate expects 1 argument, 3 provided

ESPsonoff_4CH-v1.01p.ino:82: error: 'MQTT' does not name a type

void callback(const MQTT::Publish& pub) {

                 ^

ESPsonoff_4CH-v1.01p.ino:82: error: expected unqualified-id before '&' token

void callback(const MQTT::Publish& pub) {

                              ^

ESPsonoff_4CH-v1.01p.ino:82: error: expected ')' before '&' token

ESPsonoff_4CH-v1.01p.ino:82: error: expected initializer before 'pub'

void callback(const MQTT::Publish& pub) {

                                ^

exit status 1 no matching function for call to 'PubSubClient::PubSubClient(WiFiClient&, const char [14], int)'

This report would have more information with "Show verbose output during compilation" enabled in File > Preferences.

AlbertoRubinelli commented 5 years ago

I have the same problem, calling the subscribe method and passing a string. no matching function for call to 'PubSubClient::subscribe (String&)' It's possible only to pass a string constant? I need to index the call

MKme commented 5 years ago

Same. Anyone get this back working?

exocode commented 5 years ago

same same.

knolleary commented 5 years ago

@exocode thanks for your contribution to the discussion.

What version of PubSubClient have you got? How did you install it? What platform are you using it on?

vazquezjm commented 5 years ago

Hi @knolleary

I'm also getting this error:

error: no matching function for call to 'PubSubClient::publish(const char [19], String)'
client.publish("office/sensor/temp", String((float)temp));

As you can see, I have 2.7 installed. Also tried with 2.6 with same result

image

Windows 10, 64bits. Arduino IDE 1.8.9. ESP8266 ESP-01

knolleary commented 5 years ago

@vazquezjm you are passing a string type as the second argument. There is no such method in this library. You probably want that second arg to be a char* : https://github.com/knolleary/pubsubclient/blob/d2ff771f4a79950fa36e35c4c71e232da4f85f5d/src/PubSubClient.h#L141

rohandhananjaya commented 5 years ago

I got same error and I fixed it! The error is this function needs char array and we use String. To solve that error you need to convert this string to char array...

String comsg;
comsg="Connected";

client.publish("/test/confirm", (char*) comsg.c_str());

Good Luck!

knolleary commented 5 years ago

This library doesn't define anything to do with void callback(const MQTT::Publish& pub). You must be using an example from a different library.

knolleary commented 5 years ago

I don't understand what you mean. Rather than hijack someone else's issue with your own problem, please raise a new issue if it is related to this library. If you are using a different library, then I can't help.

sujithkumarjp commented 5 years ago

I downloaded library of yours only sir...I doing project it is very urgent... kindly help....lib name is pubsubclient master lib ..

On Wed 28 Aug, 2019, 2:14 AM knolleary, notifications@github.com wrote:

I don't understand what you mean. Rather than hijack someone else's issue with your own problem, please raise a new issue if it is related to this library. If you are using a different library, then I can't help.

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/knolleary/pubsubclient/issues/319?email_source=notifications&email_token=ALDQGJWZ74JFE43UQ5MGGWDQGWGZRA5CNFSM4DXXWGBKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD5JBZ2A#issuecomment-525475048, or mute the thread https://github.com/notifications/unsubscribe-auth/ALDQGJTBNFZDF6I5VXQWAALQGWGZRANCNFSM4DXXWGBA .

knolleary commented 5 years ago

You are using this library, but your sketch is for a different library. All I can say is you should start with the examples this library provides, not whatever code you've copied to get the MQTT::Publish reference in your code. But as I said, do not use someone else's issue for your own problem. I will not reply to you on this issue again. Raise a new issue and provide details of your code if you want any help. It may be urgent for you, but it really isn't for me.

sujithkumarjp commented 5 years ago

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include //Library can be download below

include //Library can be downloaded below

include //Library can be downloaded below

include

int sensorPin1 = 5;

//int flowPin2 = 4; //int flowPin3 = 3; //int flowPin4 = 2;

unsigned long flow1count = 0; unsigned long flow2count = 0;

define countof(a) (sizeof(a) / sizeof(a[0]))

/ Connecting to existing wifi AP Network /

//char ssid[] = "14CORE"; // your network SSID (name) //char password[] = "we do what we must, because we can"; // your network password

/ Make you own stand alone wifi networ accesspoint/ const char ssid = "14CORE"; const char password = "1234567890";

// Set your IP address for your suitable for your network IP/SEGMENT

IPAddress server(192, 168, 4, 100);

PubSubClient client(server); String webString = "14CORE | Water Flow Sensor with ESP8266"; // String to display

// Callback function

void callback(const MQTT::Publish& pub) { if(pub.payload_string().equals("flow1")) { webString = "Flow 2: " + String(flow1count/450.0) + " L"; // Arduino has a hard time with float to string client.publish("outTopic",webString); } else if(pub.payload_string().equals("flow2")) { webString = "Flow 2: " + String(flow2count/450.0) + " L"; client.publish("outTopic",webString); // send to someones browser when asked

  } else

Serial.print("14CORE | Flow Sensor ") Serial.print("Flow 1 in Liters: "); Serial.print(flow1count/450.0); Serial.print("\tFlow 2 in Liters: "); Serial.print(flow2count/450.0); Serial.print("\tFlow 1 in pulses: "); Serial.print(flow1count); Serial.print("\tFlow 2 in pulse: "); Serial.println(flow2count); delay(500);

{ } Serial.print(pub.topic()); Serial.print(" => "); Serial.println(pub.payload_string()); } void setup() {

Serial.begin(115200); pinMode(sensorPin1, INPUT_PULLUP); attachInterrupt(sensorPin1, flow1, CHANGE); pinMode(flowPin2, INPUT_PULLUP); attachInterrupt(flowPin2, flow2, CHANGE); client.set_callback(callback);

// Connect to existing wifi network

WiFi.begin(ssid, password); Serial.print("\n\r \n\rWorking to connect");

// Wait 5mili for connection

while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("Connecting ") Serial.print("."); }

Serial.println(""); Serial.print Serial.println("14CORE | ESP8266 Server"); Serial.print("Connected to "); Serial.println(ssid); Serial.print("IP address: "); Serial.println(WiFi.localIP());

if (client.connect("14CORE | ESP8266 Liquid Flow Sensor")) { client.publish("outTopic","flow boot up"); client.subscribe("inTopic"); } }

void loop() { client.loop(); }

void flow1() { flow1count +=1; }

void flow2() { flow2count +=1; }

On Wed 28 Aug, 2019, 2:23 AM knolleary, notifications@github.com wrote:

You are using this library, but your sketch is for a different library. All I can say is you should start with the examples this library provides, not whatever code you've copied to get the MQTT::Publish reference in your code. But as I said, do not use someone else's issue for your own problem. I will not reply to you on this issue again. Raise a new issue and provide details of your code if you want any help. It may be urgent for you, but it really isn't for me.

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/knolleary/pubsubclient/issues/319?email_source=notifications&email_token=ALDQGJX5S7E6ZPVTTOAKMA3QGWH3FA5CNFSM4DXXWGBKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD5JCR4Y#issuecomment-525478131, or mute the thread https://github.com/notifications/unsubscribe-auth/ALDQGJSUPBIDHH2X4OGXAELQGWH3FANCNFSM4DXXWGBA .

sujithkumarjp commented 5 years ago

I have mail you kindly help me sir...I was trying...otherwise give link of the another library...sirrr..it is very much important to me

On Wed 28 Aug, 2019, 2:23 AM knolleary, notifications@github.com wrote:

You are using this library, but your sketch is for a different library. All I can say is you should start with the examples this library provides, not whatever code you've copied to get the MQTT::Publish reference in your code. But as I said, do not use someone else's issue for your own problem. I will not reply to you on this issue again. Raise a new issue and provide details of your code if you want any help. It may be urgent for you, but it really isn't for me.

— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/knolleary/pubsubclient/issues/319?email_source=notifications&email_token=ALDQGJX5S7E6ZPVTTOAKMA3QGWH3FA5CNFSM4DXXWGBKYY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD5JCR4Y#issuecomment-525478131, or mute the thread https://github.com/notifications/unsubscribe-auth/ALDQGJSUPBIDHH2X4OGXAELQGWH3FANCNFSM4DXXWGBA .

knolleary commented 5 years ago

@sujithkumarjp. I asked you not to comment on this issue. Raise a new issue. Any more replies from you on this issue will be removed. If this really is so important to you, you can raise a new issue like I have asked 3 times.

digthewells commented 4 years ago

I got same error and I fixed it! The error is this function needs char array and we use String. To solve that error you need to convert this string to char array...

String comsg;
comsg="Connected";

client.publish("/test/confirm", (char*) comsg.c_str());

Good Luck!

This worked for me. I can pass a string value such as "OK" but if I pass something like this...

String ip = WiFi.localIP().toString();

I have to convert ip to the char array and it works.

Stormbreaker78 commented 4 years ago

Hola, me podrias ayudar con esto?, es que estoy haciendo un proyecto de Iot, y me muestra este error luego de que he agregado tu biblioteca, te agradecería mucho si me ayudas, graciasss

C:\Users\Owner\AppData\Local\Temp\arduino_modified_sketch_532223\publish.ino: In function 'void reconnect()':

publish:48:51: error: no matching function for call to 'PubSubClient::connect(const char [10], const char [36], const char [1])'

 if (client.connect(MQTT_CLIENT_NAME, TOKEN, "")) {

                                               ^

In file included from C:\Users\Owner\AppData\Local\Temp\arduino_modified_sketch_532223\publish.ino:5:0:

C:\Users\Owner\Documents\Arduino\libraries\pubsubclient-master\src/PubSubClient.h:119:9: note: candidate: bool PubSubClient::connect(String)

bool connect(String id);

     ^

C:\Users\Owner\Documents\Arduino\libraries\pubsubclient-master\src/PubSubClient.h:119:9: note: candidate expects 1 argument, 3 provided

C:\Users\Owner\Documents\Arduino\libraries\pubsubclient-master\src/PubSubClient.h:131:9: note: candidate: bool PubSubClient::connect(String, String, uint8_t, bool, String)

bool connect(String id, String willTopic, uint8_t willQos, bool willRetain, String willMessage);

     ^

C:\Users\Owner\Documents\Arduino\libraries\pubsubclient-master\src/PubSubClient.h:131:9: note: candidate expects 5 arguments, 3 provided

C:\Users\Owner\Documents\Arduino\libraries\pubsubclient-master\src/PubSubClient.h:193:9: note: candidate: bool PubSubClient::connect(MQTT::Connect&)

bool connect(MQTT::Connect &conn);

     ^

C:\Users\Owner\Documents\Arduino\libraries\pubsubclient-master\src/PubSubClient.h:193:9: note: candidate expects 1 argument, 3 provided

publish:52:27: error: 'class PubSubClient' has no member named 'state'

   Serial.print(client.state());

                       ^

C:\Users\Owner\AppData\Local\Temp\arduino_modified_sketch_532223\publish.ino: In function 'void setup()':

publish:81:10: error: 'class PubSubClient' has no member named 'setServer'

client.setServer(mqttBroker, 1883);

      ^

publish:82:10: error: 'class PubSubClient' has no member named 'setCallback'

client.setCallback(callback); 

      ^

Se encontraron varias bibliotecas para "WiFi.h" Usado: C:\Users\Owner\Documents\ArduinoData\packages\esp32\hardware\esp32\1.0.4\libraries\WiFi No usado: C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.33.0_x86__mdqgnx93n4wtt\libraries\WiFi exit status 1 no matching function for call to 'PubSubClient::connect(const char [10], const char [36], const char [1])'

joko2020 commented 3 years ago

(char*) comsg.c_str()

Thanks ... You Save My life , I just Googling and found your answer..and work like a charm

ronaldvdmeer commented 3 years ago

I fixed it! The error is this function needs char array and we use String. To solve that error you need to convert this string to char array...

String comsg;
comsg="Connected";

client.publish("/test/confirm", (char*) comsg.c_str());

Good Luck!

Thank you!

becks0815 commented 2 years ago

I can confirm that the conversion from string to a char array is the solution for this error,

brightproject commented 2 years ago

String topic_test= "/test_topic"; client.publish(topic_test, String(temp_test_sensor, 2).c_str(), true);