Compilation error: ‘class WebSerialClass’ has no member named ‘msgCallback’
Please what is this error
i used arduino

Hi Brad,
Did you figure #2 out. Ditto. Can’t seem to print in Setup(). WebSerial.println() placed after server.begin()

void setup() {
Serial.begin(115200);
pinMode(LED, OUTPUT);
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
if (WiFi.waitForConnectResult() != WL_CONNECTED) {
Serial.printf(“WiFi Failed!\n”);
return;
}
Serial.print(“IP Address: “);
Serial.println(WiFi.localIP());
// WebSerial is accessible at “/webserial” in browser
WebSerial.begin(&server);
WebSerial.onMessage(recvMsg);
server.begin();
WebSerial.println(“End of Setup()”);
}

Hi, I am trying to do a simple web serial solution, using no
JSON or Python or HTML, just C/C++ type solution, as if
I were debugging to a terminal session.

After trying a half dozen projects, wading thru all the lib
issues of each project, cryptic errors when I finally can
get a successful compile, a complete failure results in
Rosetta Stone type un translatable errors.

Do you know of or have a solution to this ? Or am I just
dreaming simple string data cannot be sent to web pages,
its all an illusion.

Regards, Dana.

Hi.
You need to update to the following libraries:

https://rntlab.com/question/solvedassert-failed-tcp_alloc-idf-components-lwip-lwip-src-core-tcp-c1851-required-to-lock-tcpip-core-functionality/

I’ll update all our web server tutorials when I come back to the office.

Regards,
Sara

IP Address: 192.168.0.35

assert failed: tcp_alloc /IDF/components/lwip/lwip/src/core/tcp.c:1851 (Required to lock TCPIP core functionality!)

Backtrace: 0x40082489:0x3ffb1fe0 0x4008c321:0x3ffb2000 0x400925d6:0x3ffb2020 0x400f55d3:0x3ffb2150 0x400f574d:0x3ffb2170 0x400d580c:0x3ffb2190 0x400dd2ed:0x3ffb21e0 0x400d2a9a:0x3ffb2200 0x400e13cf:0x3ffb2270 0x4008d06a:0x3ffb2290

ELF file SHA256: 81cdc6e68

Rebooting…
ets Jul 29 2019 12:21:46

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:4916
load:0x40078000,len:16492
load:0x40080400,len:4
load:0x40080404,len:3524
entry 0x400805b8

What went wrong ?

rgds
Michael

Hi.
We’ll need to rewrite this tutorial to be compatible with the latest version.
Thanks for your patience.
Regards,
Sara

Hi.
We’ll try to update this tutorial soon.
Regards,
Sara

Yeah I came here to say this. I have just wasted many hours trying to make this work before realising that this tutorial is nearly 10 years old and uses completely the wrong libraries.

swear words