WiFiClient not working as expected

[trevorwslee]

Boards

AMB82-mini

External Hardware

no`

Hardware Configuration

no

Version

other

IDE Name

Arduino IDE 2.3.3

Operating System

Windows

Auto Flash Mode

Disable

Erase All Flash Memory (16MB)

Disable

Standard Lib

Arduino_STD_PRINTF

Upload Speed

2000000

Description

The sample SimpleTCPServer.ino (https://github.com/Ameba-AIoT/ameba-arduino-pro2/blob/dev/Arduino_package/hardware/libraries/WiFi/examples/SimpleTCPServer/SimpleTCPServer.ino) works fine.

However, if the loop() is changed to be like

void loop()
{
    WiFiClient client = server.available();
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        Serial.print(c);
      }
    }
    client.stop();
}

it doesn't seem to work as expected,

Note that I tried the same modified sketch with UNO R4 and it works fine with UNO R4

Thanks for looking into the issue.

Sketch

#include <WiFi.h>

char ssid[] = "xxx";    // your network SSID (name)
char pass[] = "xxx";        // your network password (use for WPA, or use as key for WEP)
int keyIndex = 0;                // your network key Index number (needed only for WEP)
int status = WL_IDLE_STATUS;     // Indicator of Wifi status

WiFiServer server(5000);

void setup()
{
    Serial.begin(115200);    // initialize serial communication

    // attempt to connect to Wifi network:
    while (status != WL_CONNECTED) {
        Serial.print("Attempting to connect to Network named: ");
        Serial.println(ssid);    // print the network name (SSID);

        // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
        status = WiFi.begin(ssid, pass);
        // wait 10 seconds for connection:
        delay(10000);
    }
    //server.setNonBlockingMode();
    server.begin();       // start the tcp server on port 5000
    printWifiStatus();    // you're connected now, so print out the status
}

const size_t bufferLen = 1;
char buffer[bufferLen];
void loop()
{
    WiFiClient client = server.available();
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        Serial.print(c);
      }
    }
    client.stop();
}

void printWifiStatus()
{
    // print the SSID of the network you're attached to:
    Serial.print("SSID: ");
    Serial.println(WiFi.SSID());

    // print your WiFi IP address:
    IPAddress ip = WiFi.localIP();
    Serial.print("IP Address: ");
    Serial.println(ip);

    // print the received signal strength:
    long rssi = WiFi.RSSI();
    Serial.print("signal strength (RSSI):");
    Serial.print(rssi);
    Serial.println(" dBm");
}

Error/Debug Message

none

Reproduce remarks

No response

I have checked online documentation, FAQ, GitHub Wiki and existing/closed issues.

• I confirm I have checked online documentation, FAQ, GitHub Wiki and existing/closed issues.

[github-actions]

Hello, hope this message finds you well. Congrats to your first Issue! We will review it as soon as possiable. Feel free to have a look at https://www.amebaiot.com/en/ameba-arduino-summary/ for more information

[Kyderio]

Hi, have you tried setting non blocking mode for your server? Uncomment this line: //server.setNonBlockingMode(); in your set up loop. Thank you.

[trevorwslee]

If I enable non-blocking mode, I will get error like: [ERROR] get_available Accept connection failed right after the sketch started looping in loop() and here is the sketch I used /* Example guide: https://www.amebaiot.com/en/amebapro2-arduino-server-client/ */ #include <WiFi.h> char ssid[] = "..."; // your network SSID (name) char pass[] = "..."; // your network password (use for WPA, or use as key for WEP) int keyIndex = 0; // your network key Index number (needed only for WEP) int status = WL_IDLE_STATUS; // Indicator of Wifi status WiFiServer server(5000); void setup() { Serial.begin(115200); // initialize serial communication // attempt to connect to Wifi network: while (status != WL_CONNECTED) { Serial.print("Attempting to connect to Network named: "); Serial.println(ssid); // print the network name (SSID); // Connect to WPA/WPA2 network. Change this line if using open or WEP network: status = WiFi.begin(ssid, pass); // wait 10 seconds for connection: //delay(10000); for (int i = 0; i < 10; i++) { Serial.println("... wait ..."); delay(1000); } } server.setNonBlockingMode(); // R4 doesn't have this server.begin(); // start the tcp server on port 5000 } void loop() { WiFiClient client = server.available(); bool firstConnected = false; while (client.connected()) { if (firstConnected) { Serial.println("***** connected *****"); } firstConnected = true; if (client.available()) { char c = client.read(); Serial.print(c); } } client.stop(); Serial.println("***** the end *****"); }

…

On Fri, 22 Nov 2024 at 15:31, Kelvin Huang ***@***.***> wrote: Hi, have you tried setting non blocking mode for your server? Uncomment this line: //server.setNonBlockingMode(); in your set up loop. Thank you. — Reply to this email directly, view it on GitHub <#279 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AHRXLPALQ4WZBXO6A7RH2OL2B3MV7AVCNFSM6AAAAABRMRZ5ZSVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDIOJTGA2TMMZXGE> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[github-actions]

This issue is stale because it has been open for 14 days with no activity.