WebSocket message with Arduino MKR 1010 using WiFiNINA and ArduinoHttpClient libraries

Question

I am trying to send a WebSocket message to a server. The example for the ArduinoHttpClient library uses WiFi101 but that will not work for the MKR 1010. So I am trying to use WifiNINA instead. The WiFi part works fine but is seems the WebSocket cannot "begin".

#include <SPI.h>
#include <WiFiNINA.h>
#include <ArduinoHttpClient.h> /*Need to implement*/
//https://github.com/arduino-libraries/ArduinoHttpClient/blob/master/examples/SimpleWebSocket/SimpleWebSocket.ino
//https://www.arduino.cc/en/Tutorial/WiFiNINAConnectWithWPA
char ssid[] = "SSID_NAME"; // your network SSID (name)
char pass[] = "WPA2_Password"; // your network password (use for WPA, or use as key for WEP)
int status = WL_IDLE_STATUS; // the Wifi radio's status
char serverAddress[] = "192.168.0.195"; // server address
int port = 3652;
WiFiClient wifi;
WebSocketClient client = WebSocketClient(wifi, serverAddress, port);
void setup() {
 //Initialize serial and wait for port to open:
 Serial.begin(9600);
 while (!Serial) {
 ; // wait for serial port to connect. Needed for native USB port only
 }
 // check for the WiFi module:
 if (WiFi.status() == WL_NO_MODULE) {
 Serial.println("Communication with WiFi module failed!");
 // don't continue
 while (true);
 }
 String fv = WiFi.firmwareVersion();
 if (fv < "1.0.0") {
 Serial.println("Please upgrade the firmware");
 }
 // 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);
 // wait 10 seconds for connection:
 delay(10000);
 }
 // you're connected now, so print out the data:
 Serial.print("You're connected to the network");
 printCurrentNet();
 printWifiData();
}
void loop() {
 // check the network connection once every 10 seconds:
 delay(10000);
 //printCurrentNet();
 Serial.println("starting WebSocket client");
 client.begin();
 Serial.print("Is client connected? -> ");
 Serial.println(client.connected());
 client.beginMessage(TYPE_TEXT);
 client.print("Fire alarm from arduino mkr1010 - sensor1 ");
 client.endMessage();
 while (client.connected()) {
 Serial.print("Sending fire alarm ");
 // send fire alarm
 client.beginMessage(TYPE_TEXT);
 client.print("Fire alarm from arduino mkr1010 - sensor1 ");
 client.endMessage();
 }
 /*
 // check if a message is available to be received
 int messageSize = client.parseMessage();
 if (messageSize > 0) {
 Serial.println("Received a message:");
 Serial.println(client.readString());
 }*/
}
void printWifiData() {
 // print your board's IP address:
 IPAddress ip = WiFi.localIP();
 Serial.print("IP Address: ");
 Serial.println(ip);
 Serial.println(ip);
}
void printCurrentNet() {
 // print the SSID of the network you're attached to:
 Serial.print("SSID: ");
 Serial.println(WiFi.SSID());
 // print the received signal strength:
 long rssi = WiFi.RSSI();
 Serial.print("signal strength (RSSI):");
 Serial.println(rssi);
 // print the encryption type:
 byte encryption = WiFi.encryptionType();
 Serial.print("Encryption Type:");
 Serial.println(encryption, HEX);
 Serial.println();
}

Could it be that there are compatibility issues between the ArduinoHttpClient library and the Arduino MKR1010? I am thinking of getting an ESP32 instead since there seem to be more WebSocket libraries built around it.

• Juraj: doesn't firewall on server block the port?
• Arjuna Deva: Good point @Juraj, will have to look into it, there is a firewall

Answer 1

I needed to use port 80.

I got a hint from wikipedia:

The communications are done over TCP port number 80 (or 443 in the case of TLS-encrypted connections), which is of benefit for those environments which block non-web Internet connections using a firewall.

https://en.wikipedia.org/wiki/WebSocket

Switched to port 80 and it works!