I was given a project to convert from ESP8266 to ESP32, and I'm definitely not a coder, but it needs to get done. So I was hoping I could get some guidance/help on how to solve this issue. I'm basically taking previous code from an old project using an ESP8266 WiFi module and converting it over to a more updated module using ESP32. Been compiling and troubleshooting code as I go the best I can, but this one has stumped me.
The error message I'm getting is "No matching function for call to 'WiFiUDP::beginMulticast(IPAddress, IPAddress&, const unsigned int&)'
There are several pages of code, but this is the .cpp file that is currently throwing up an error, and hoping it's able to be resolved with something on this page. Like I said, I'm not a coder, but I have the basics down. Any help on this would be greatly appreciated. Thanks!
#include "Switch.h"
#include <functional>
// Multicast declarations
IPAddress ipMulti(239, 255, 255, 250);
const unsigned int portMulti = 1900;
char packetBuffer[512];
#define MAX_SWITCHES 14
Switch switches[MAX_SWITCHES] = {};
int numOfSwitchs = 0;
//#define numOfSwitchs (sizeof(switches)/sizeof(Switch)) //array size
//<<constructor>>
UpnpBroadcastResponder::UpnpBroadcastResponder(){
}
//<<destructor>>
UpnpBroadcastResponder::~UpnpBroadcastResponder(){/*nothing to destruct*/}
bool UpnpBroadcastResponder::beginUdpMulticast(){
boolean state = false;
Serial.println("Begin multicast ..");
if(UDP.beginMulticast(WiFi.localIP(), ipMulti, portMulti)) {
Serial.print("Udp multicast server started at ");
Serial.print(ipMulti);
Serial.print(":");
Serial.println(portMulti);
state = true;
}
else{
Serial.println("Connection failed");
}
return state;
}
//Switch *ptrArray;
void UpnpBroadcastResponder::addDevice(Switch& device) {
Serial.print("Adding switch : ");
Serial.print(device.getAlexaInvokeName());
Serial.print(" index : ");
Serial.println(numOfSwitchs);
switches[numOfSwitchs] = device;
numOfSwitchs++;
}
void UpnpBroadcastResponder::serverLoop(){
int packetSize = UDP.parsePacket();
if (packetSize <= 0)
return;
IPAddress senderIP = UDP.remoteIP();
unsigned int senderPort = UDP.remotePort();
// read the packet into the buffer
UDP.read(packetBuffer, packetSize);
// check if this is a M-SEARCH for WeMo device
String request = String((char *)packetBuffer);
if(request.indexOf('M-SEARCH') > 0) {
if(request.indexOf("urn:Belkin:device:**") > 0) {
Serial.println("Got UDP Belkin Request..");
// int arrSize = sizeof(switchs) / sizeof(Switch);
for(int n = 0; n < numOfSwitchs; n++) {
Switch &sw = switches[n];
if (&sw != NULL) {
sw.respondToSearch(senderIP, senderPort);
}
}
}
}
}```
The Arduino UDP API as defined by the UDP base class in Arduino core has
uint8_t beginMulticast(IPAddress, uint16_t);
In esp8266 Arduino WiFi the UDP is modified and the first parameter of beginMulticast specifies the network interface to listen to. (Network interfaces are STA, SoftAP, Ethernet etc)
In esp32 Arduino WiFi library beginMulticast has only the standard parameters and listens on all network interfaces.
Your solution is to remove the first parameter in the beginMulticast call.
Related
In a sketch of Arduino there is an example WiFi Telnet To Serial with ESP8266. There is a piece of code that is used to receive data from a client:
//check clients for data
for(i = 0; i < MAX_SRV_CLIENTS; i++){
if (serverClients[i] && serverClients[i].connected()){
if(serverClients[i].available()){
//get data from the telnet client and push it to the UART
while(serverClients[i].available())
Serial.write(serverClients[i].read());
}
}
}
This data is sent to the console or the serial port, but I need to capture that data and store it in a byte array:
byte bufferMSGfromCliente[1024]
How to do it?
Its not c++ but you might be able to use a processing sketch. The syntax is very close to arduino so it should be familiar.
import processing.serial.*;
Serial myPort; // The serial port
void setup() {
// List all the available serial ports
printArray(Serial.list());
// Open the port you are using at the rate you want:
myPort = new Serial(this, Serial.list()[0], 9600);
}
void draw() {
int i = 0;
byte[] bufferMSGfromCliente = new byte[1024];
while (myPort.available() > 0) {
int inByte = myPort.read();
if(i > 1024)
{
i = 0;
}
bufferMSGfromCliente[i] = inByte;
i++;
}
}
Did you try to write it to another Serial port? Here you write it on the same Serial port as your Serial Monitor.
Best would be to store serverClients[i].read() into a Byte and then Serial.println(Byte) to see what the information is.
After that, ask yourself:
1. What Serial port will this information be sent to, what is the destination?
2. How can I confirm that information is sent succesfully and has the ability to be debugged.
Also, use Serial.flush() to make sure the Serial.write function completes. Eventhough it says ''flush'', the function in Arduino IDE waits for the Serial write function to be completed.
I'm working with google Iot cloud with ESP32, I am sending fake values just to make a test with the MQTT data PUB/SUB, Apparently I'm succeeding in publishing the values, sometimes, I can't reconnect to google iot.
I don't know why it keeps checking wifi...publising and doest check for the JWT key.
I have noticed that if I connect once to the google iot and then I unplug the esp32 from my pc (disconnect no power), and plug it back again and try to connect, I will enter in this "checking wifi" for about 30m, until I can connect back to google iot. How can fix this? I beleived there was something to deal with this:
// Time (seconds) to expire token += 20 minutes for drift
const int jwt_exp_secs = 3600; // Maximum 24H (3600*24)
When I manage to get a good response that send info to the servers, i get this+:
entry 0x400806b8
Setup.....
Starting wifi
Connecting to WiFi
Connected
Waiting on time sync...
checking wifi...
connecting...Refreshing JWT
connected
Library connected!
incoming: /devices/esp32-device/config -
incoming: /devices/esp32-device/config -
Publishing value
Publishing value
Publishing value
Publishing value
Publishing value
There is times that I get a bad response for about 30m, using the same code, it seems to be sending constant data, which shouldn't be constant.(wasn't suppose to happen):
ho 0 tail 12 room 4
load:0x40080400,len:6352
entry 0x400806b8
Setup.....
Starting wifi
Connecting to WiFi
Connected
Waiting on time sync...
checking wifi...Publishing value
checking wifi...checking wifi...checking wifi...Publishing value
(Just keeps repeating)
This is the main connection to MQTT code, with the attempts to fix problems, but didn't work:
// This file contains static methods for API requests using Wifi / MQTT
#ifndef __ESP32_MQTT_H__
#define __ESP32_MQTT_H__
#include <Client.h>
#include <WiFi.h>
#include <WiFiClientSecure.h>
#include <MQTT.h>
#include <CloudIoTCore.h>
#include <CloudIoTCoreMqtt.h>
#include "ciotc_config.h" // Update this file with your configuration
void messageReceived(String &topic, String &payload) {
Serial.println("incoming: " + topic + " - " + payload);
}
// Initialize WiFi and MQTT for this board
Client *netClient;
CloudIoTCoreDevice *device;
CloudIoTCoreMqtt *mqtt;
MQTTClient *mqttClient;
unsigned long iat = 0;
String jwt;
String getDefaultSensor() {
return "Wifi: " + String(WiFi.RSSI()) + "db";
}
String getJwt() {
Serial.println("Entered JWT");
delay(5000);
iat = time(nullptr);
Serial.println("Refreshing JWT");
jwt = device->createJWT(iat, jwt_exp_secs);
return jwt;
}
void setupWifi() {
Serial.println("Starting wifi");
Serial.print("WIFI status = ");
Serial.println(WiFi.getMode());
WiFi.disconnect(true);
delay(3000);
WiFi.mode(WIFI_STA);
delay(3000);
Serial.print("WIFI status = ");
Serial.println(WiFi.getMode());
WiFi.begin(ssid, password);
Serial.println("Connecting to WiFi");
while (WiFi.status() != WL_CONNECTED) {
delay(100);
}
Serial.println("Connected");
delay(5000);
configTime(0, 0, ntp_primary, ntp_secondary);
Serial.println("Waiting on time sync...");
while (time(nullptr) < 1510644967) {
delay(10);
}
}
void connectWifi() {
Serial.print("checking wifi...");
while (WiFi.status() != WL_CONNECTED) {
Serial.print(".");
}
delay(5000);
}
bool publishTelemetry(String data) {
return mqtt->publishTelemetry(data);
}
bool publishTelemetry(const char* data, int length) {
return mqtt->publishTelemetry(data, length);
}
bool publishTelemetry(String subfolder, String data) {
return mqtt->publishTelemetry(subfolder, data);
}
bool publishTelemetry(String subfolder, const char* data, int length) {
return mqtt->publishTelemetry(subfolder, data, length);
}
void connect() {
connectWifi();
mqtt->mqttConnect();
delay(5000);
}
void setupCloudIoT() {
device = new CloudIoTCoreDevice(
project_id, location, registry_id, device_id,
private_key_str);
setupWifi();
netClient = new WiFiClientSecure();
mqttClient = new MQTTClient(512);
mqttClient->setOptions(180, true, 1000); // keepAlive, cleanSession, timeout
mqtt = new CloudIoTCoreMqtt(mqttClient, netClient, device);
mqtt->setUseLts(true);
mqtt->startMQTT();
delay(5000);
}
#endif //__ESP32_MQTT_H__
This is the main.cpp:
#include <Arduino.h>
#include <WiFiClientSecure.h>
#include "esp32-mqtt.h"
#include <ArduinoJson.h>
#define led 14
char buffer[100];
float counter = 0;
float counter1 = 0;
void setup() {
Serial.begin(115200);
Serial.println("Setup.....");
pinMode(led, OUTPUT);
setupCloudIoT();
}
unsigned long lastMillis = 0;
void loop() {
mqtt->loop();
delay(10); // <- fixes some issues with WiFi stability
if (!mqttClient->connected()) {
connect();
}
counter++;
counter1++;
if (millis() - lastMillis > 1000) {
Serial.println("Publishing value");
lastMillis = millis();
float temp = counter;
float hum = counter1;
StaticJsonDocument<100> doc;
doc["temp"] = temp;
doc["humidity"] = hum;
serializeJson(doc, buffer);
publishTelemetry(buffer);
}
}
Does someone know if there is any other module that doesn't have this same issue?
The issue you face is IMHO not a problem of your code or the MQTT-lib you use. There seems to be a problem in the ESP32 core package (1.04 has it still). See this collection of issues from github and some proposed work around, which in the end delay the problem but do not solve it.
Issue with MQTT collection of problems from 2018 till today
These are open issues regarding WiFi re/connection problems
A test case for provoking an error is linked from one of the post.I use for identifying ESP32 specific problems the identical programm on an esp8266 with MQTT connection and there it runs for months.The ESP32 people have the bad habit to leave issues uncommented open for month hopeing the stale bot closes them. So I just cited the open issues, if you search for closed issues you'll find some more) closed by stale bot and not by solution!
Using mbed OS and stm32 nucleo board with Adafruit Fona 3g, I am trying to send data to a server via 3g connection. I am using the .cpp file and .h file posted here: https://os.mbed.com/users/Nels885/code/Adafruit_FONA_3G/file/b18cfba4283a/
The code seems to get stuck on getTCPtimeout. I am having trouble figuring out why this is the case.
I have tried commenting out the getTCPtimeout function to see the results and the code runs through completely, but never establishes a connection with the server.
#include "mbed.h"
#include "Adafruit_FONA.h"
#define FONA_RST D4
#define FONA_TX D1
#define FONA_RX D0
#define FONA_RI D7 //not used
char replybuffer[255];
Adafruit_FONA_3G fona(FONA_TX, FONA_RX, FONA_RST, FONA_RI);
Serial pc(USBTX, USBRX);
int main()
{
fona.TCPinitialize();
pc.printf ("initialize \n");
char *Timeout = "10000000";
fona.getTCPtimeout(Timeout);
pc.printf ("timeout \n");
char * Server = "47.218.188.133";
uint16_t Port = 23;
fona.TCPconnect(Server,Port);
pc.printf ("connect \n");
char * Packet = "Pick Up %";
fona.TCPsend(Packet);
pc.printf ("send \n");
fona.TCPclose();
pc.printf ("close \n");
}
Edit: I was running the code and noticed that after fixing the above issue, the code would get stuck TCPSend function, specifically right before
packet[0] = 0;
which is shown down here:
bool Adafruit_FONA_3G::TCPsend(char *packet)
{
if (strlen(packet) > 0) {
mySerial.printf("%s", packet);
//mySerial.printf("%s\r\n", packet);
readline();
packet[0] = 0;
return true;
} else return false;
}
When commenting out the line, the code would run all the way through. I am still in the process of testing to see if the code still functions as intended, but my question is what exactly is the purpose of packet[0] = 0;?
Adafruit_FONA_3G::getTCPtimeout() assumes that you pass it a writable buffer of size > 20. You're passing a read-only buffer of smaller size. So, replace
char *Timeout = "10000000";
with
char Timeout[21];
I'm using the following Arduino websocket library, I had a problem when trying to send messages over than 65535 characters, I got handshake fail error.
As long as the message doesn't exceeds this length, it worked perfectly
There's a note on the main web page of the library that states:
Because of limitations of the current Arduino platform (Uno at the time of this writing),
this library does not support messages larger than 65535 characters.
In addition, this library only supports single-frame text frames.
It currently does not recognize continuation frames, binary frames, or ping/pong frames.
In the client header file named WebSocketClient.h there's the following comment:
// Don't allow the client to send big frames of data. This will flood the arduino memory and might even crash it.
#ifndef MAX_FRAME_LENGTH
#define MAX_FRAME_LENGTH 256
#endif
I'm using this old library because it is the only one worked for me on my Arduino WIFI shield, I couldn't find other libraries that support WiFi shield since most of the webscket libraries are written for Arduino Eathernet Shield support, which I don't have.
My Arduino Code is
/*DS18 Libs*/
#include <dht.h>
#include <OneWire.h>
#include <DallasTemperature.h>
/*Websocket Libs*/
#include <WebSocketServer.h>
#include <WebSocketClient.h>
#include <sha1.h>
#include <MD5.h>
#include <global.h>
#include <Base64.h>
#include <SPI.h>
#include <WiFiUdp.h>
#include <WiFiServer.h>
#include <WiFiClient.h>
#include <WiFi.h>
#include <string.h>
char ssid[] = "AMM";
char pass[] = "027274792";
int status = WL_IDLE_STATUS;
IPAddress server(192, 168, 1, 3);
WiFiClient WiFiclient;
WebSocketClient WSclient;
// Data wire is plugged into port 2 on the Arduino
#define ONE_WIRE_BUS 2
// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);
// Pass our oneWire reference to Dallas Temperature.
DallasTemperature sensors(&oneWire);
//Humidture
dht DHT;
#define DHT11_PIN 4
void setup()
{
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
//check for the presence of the shield:
if (WiFi.status() == WL_NO_SHIELD) {
Serial.println("WiFi shield not present");
// don't continue:
while (true);
}
// attempt to connect to Wifi network:
while (status != WL_CONNECTED) {
Serial.print("Attempting to connect to WPA SSID: ");
Serial.println(ssid);
// Connect to WPA/WPA2 network:
status = WiFi.begin(ssid, pass);
}
// you're connected now, so print out the data:
Serial.print("You're connected to the network");
/* Connect to the websocket server*/
if (WiFiclient.connect(server, 8080)) {
Serial.println("Connected");
}
else {
Serial.println("Connection failed.");
while (1) {
// Hang on failure
}
}
// Handshake with the server
WSclient.path = "/MyServer/endpoint/testtest/device/d6220ae7-caa9-48b5-92db-630c4c296ec4";
WSclient.host = "192.168.1.3:8080";
if (WSclient.handshake(WiFiclient)) {
Serial.println("Handshake successful");
}
else {
Serial.println("Handshake failed.");
while (1) {
// Hang on failure
}
}
/*DS18*/
sensors.begin();
}
void loop()
{
WSclient.sendData("{\"service_code\":\"89c4da72-a561-47db-bf62-8e63f8c4bbf0\",\"data\":[" + getHumidtureValue() + "],\"service_type\":\"TemperatureHumidityAnalysis\"}");
WSclient.sendData("{\"service_code\":\"bdc0f984-6550-4712-881f-b09071da5a73\",\"data\":" + getCBodyTempretureValue() + ",\"service_type\":\"TemperatureGaugeMonitor\"}");
//line-3 commented WSclient.sendData("{\"service_code\":\"8c212432-a86e-4c18-a956-9dc0dbb648d4\",\"data\":[" + getHumidtureValue() + "],\"service_type\":\"HumidityGaugeMonitor\"}");
}
String getCBodyTempretureValue()
{
sensors.requestTemperatures(); // Send the command to get temperatures
char charVal[10];
return dtostrf(sensors.getTempCByIndex(0), 4, 2, charVal);
}
String getHumidtureValue()
{
String str = "";
for (int i = 0; i < 2; i++)
{
int chk = DHT.read11(DHT11_PIN);
switch (chk)
{
case DHTLIB_OK:
Serial.println("OK,\t");
break;
case DHTLIB_ERROR_CHECKSUM:
Serial.println("Checksum error,\t");
break;
case DHTLIB_ERROR_TIMEOUT:
Serial.println("Time out error,\t");
break;
default:
Serial.println("Unknown error,\t");
break;
}
char charVal[10];
double tempF = (DHT.temperature * 9) / 5 + 32;
str = dtostrf(tempF, 3, 1, charVal);
str = str + "," + dtostrf(DHT.humidity, 3, 1, charVal);
Serial.println(str);
delay(200);
}
return str;
}
The code above works perfectly, when I uncomment the third send statement in the loop function, I got the handshake failed error.
-Is it safe to modify the value of MAX_FRAME_LENGTH for the new versions of Arduino board, considering this library is an old one?
-Is there any other libraries better than this one that can support websocket on WiFi shield?
Any solution or idea will appreciated.
Thanks in advance.
Without having looked at the code of the library it is likely not safe to change the max frame length, because the websocket protocol encodes the payload length differently depending on how long it is:
Payload length: 7 bits, 7+16 bits, or 7+64 bits.
The length of the "Payload data", in bytes: if 0-125, that is the payload length. If 126, the following 2 bytes interpreted as a 16-bit unsigned integer are the payload length. If 127, the following 8 bytes interpreted as a 64-bit unsigned integer (the most significant bit MUST be 0) are the payload length.
When the library says it doesn't support payload length above 65535 byte, it likely means that it has no implementation for the 64-bit length encoding.
After many trials and many times the program behaves very strangely, which drives me crazy, I found the problem is that I'm using too much strings in my program which makes the Arduino-Uno easily runs out of RAM.
The main reason I got handshake failed error is that the Arduino cannot read the "Sec-WebSocket-Accept" header of the handshake response message (as many other headers also) which I made sure that they are sent, by debugging code on the server.
Actually this problem and many other strange behaviors keep happening until I reduce the amount of the memory used during program run.
Hey I have problems with receiving strings from Arduino. I am running on linux and I want to use C++ fotr that. I an easily send strings from C++ code to arduino. For that I use C++ code like this.
#include <iostream>
#include <fstream>
using namespace std;
int main()
{
fstream arduino("/dev/ttyACM0");
arduino << "Led on\n";
arduino.close();
return 0;
}
So how can I receive strings from Arduino?
I'm not an Arduino expert, but from your code I concluded:
You are using a serial interface to send data
You should connect the serial interface to your computer (with a traditional serial cable, or USB)
Write a C++ app, that opens and received data from serial port. See this!
Find out from Arduino specs, what serial communication parameters are used by Arduino (stop bit, parity bits, baudrate etc) and use these parameters to configure the serial port in your C++ application!
Hope that helps!
Use boost.asio to communicate with a serial device and C++. It works like a charm and is pretty easy to use. See: http://www.boost.org/doc/libs/1_40_0/doc/html/boost_asio/overview/serial_ports.html and this: Reading from serial port with Boost Asio
The folowing code waits for a response from an arduino. If the response contains "Done" it returns 1. If it didn't find it within the given timeout, it returns -1.
It should not prove that hard to change this code to fit your needs.
int Serial::waitForResponse()
{
const int buffSize = 1024;
char bufferChar[buffSize] = {'\0'};
int counter = 0;
std::string wholeAnswer = "";
int noDataTime = 0;
while(wholeAnswer.find("Done") == std::string::npos) //Done string was found.
{
if(noDataTime > 10000)
{
std::cout << "timeout" << std::endl;
return -1;
}
counter = read(this->hSerial, bufferChar, buffSize - 1);
if(counter > 0)
{
noDataTime = 0;
bufferChar[counter] = '\0';
wholeAnswer += std::string(bufferChar);
} else
{
noDataTime++;
usleep(1000);
}
}
if(!wholeAnswer.empty())
{
return 1;
} else
{
return -1;
}