Adapt WSS to new boards and use MQTT domain for eSIM connectivity

Preserve main GNSS and volume behavior while porting verified TLS, receive fixes and full-handshake optimizations. Add MQTT connection diagnostics and route MQTT through banban.api.talkingq.com:1883.

Include migration documentation and regression tools. Firmware builds and package checks passed; user confirmed new-board connectivity after switching the MQTT host to the domain.

tools/test_wss_handshake.py

@@ -0,0 +1,75 @@
+"""Test the actual timed handshake loop with scripted SDK steps and 5 ms ticks."""
+from pathlib import Path
+import subprocess
+
+root = Path(__file__).resolve().parents[1]
+source = (root / 'ql-application/threadx/interface/custom_app/lib/librws/src/rws_socketpriv.c').read_bytes().decode('latin1')
+body = source[source.index('static const char *rws_tls_phase_name('):].split('int rws_ssl_conn(', 1)[0]
+harness = r'''
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdarg.h>
+#include "mbedtls/ssl_internal.h"
+typedef struct { int ret, next_state; unsigned int duration; } step;
+static step steps[16];
+static int count, calls, sleeps;
+static unsigned int ticks;
+static void test_log(const char *fmt, ...) { (void)fmt; }
+#define LOG_I test_log
+static unsigned int ql_rtos_get_systicks(void) { return ticks; }
+static void rws_thread_sleep(unsigned int ms) { ticks += ms / 5; ++sleeps; }
+int mbedtls_ssl_handshake_step(mbedtls_ssl_context *ctx) {
+    step s;
+    assert(ctx->state != MBEDTLS_SSL_HANDSHAKE_OVER);
+    if (calls >= count) { ++calls; return MBEDTLS_ERR_SSL_WANT_READ; }
+    s = steps[calls++]; ticks += s.duration; ctx->state = s.next_state; return s.ret;
+}
+'''
+harness += body
+harness += r'''
+static void reset(mbedtls_ssl_context *ctx) {
+    memset(ctx, 0, sizeof(*ctx));
+    ctx->state = MBEDTLS_SSL_CLIENT_HELLO;
+    count = calls = sleeps = 0; ticks = 0; memset(steps, 0, sizeof(steps));
+}
+int main(void) {
+    mbedtls_ssl_context ctx;
+    mbedtls_ssl_handshake_params handshake = {0};
+    reset(&ctx);
+    steps[0] = (step){0, MBEDTLS_SSL_SERVER_HELLO, 1};
+    steps[1] = (step){MBEDTLS_ERR_SSL_WANT_READ, MBEDTLS_SSL_SERVER_HELLO, 0};
+    steps[2] = (step){0, MBEDTLS_SSL_SERVER_CERTIFICATE, 2};
+    steps[3] = (step){0, MBEDTLS_SSL_CLIENT_KEY_EXCHANGE, 10};
+    steps[4] = (step){MBEDTLS_ERR_SSL_WANT_WRITE, MBEDTLS_SSL_CLIENT_KEY_EXCHANGE, 1};
+    steps[5] = (step){0, MBEDTLS_SSL_SERVER_FINISHED, 5};
+    steps[6] = (step){0, MBEDTLS_SSL_HANDSHAKE_OVER, 1}; count = 7;
+    assert(rws_tls_handshake_timed(&ctx) == 0 && calls == 7 && sleeps == 2 && ticks == 24);
+    reset(&ctx); ctx.handshake = &handshake; ctx.state = MBEDTLS_SSL_SERVER_KEY_EXCHANGE;
+    handshake.ecdh_ctx.grp_id = MBEDTLS_ECP_DP_CURVE25519;
+    steps[0] = (step){0, MBEDTLS_SSL_CLIENT_KEY_EXCHANGE, 1};
+    steps[1] = (step){0, MBEDTLS_SSL_HANDSHAKE_OVER, 1}; count = 2;
+    assert(rws_tls_handshake_timed(&ctx) == 0 && calls == 2 && sleeps == 0);
+    reset(&ctx); steps[0] = (step){-99, MBEDTLS_SSL_SERVER_CERTIFICATE, 1}; count = 1;
+    assert(rws_tls_handshake_timed(&ctx) == -99 && calls == 1 && sleeps == 0);
+    reset(&ctx);
+    assert(rws_tls_handshake_timed(&ctx) == MBEDTLS_ERR_SSL_TIMEOUT && ticks == 4000 && calls < 2100);
+    reset(&ctx); ticks = (unsigned int)-1000;
+    assert(rws_tls_handshake_timed(&ctx) == MBEDTLS_ERR_SSL_TIMEOUT && calls < 2100);
+    reset(&ctx); steps[0] = (step){0, MBEDTLS_SSL_SERVER_CERTIFICATE, 4001}; count = 1;
+    assert(rws_tls_handshake_timed(&ctx) == MBEDTLS_ERR_SSL_TIMEOUT && calls == 1 && sleeps == 0);
+    reset(&ctx); ctx.state = MBEDTLS_SSL_HANDSHAKE_OVER;
+    assert(rws_tls_handshake_timed(&ctx) == 0 && calls == 0);
+    puts("PASS: timed SDK handshake loop: progress, WANT_READ/WRITE, no progress sleeps, fatal, deadline, tick wrap, complete state");
+    return 0;
+}
+'''
+output = root / 'artifacts/wss'
+output.mkdir(parents=True, exist_ok=True)
+cfile = output / 'test_wss_handshake.c'
+cfile.write_text(harness, encoding='utf-8')
+exe = output / 'test_wss_handshake.exe'
+subprocess.run(['cl', '/nologo', '/W4', '/WX', '/TC', str(cfile),
+                '/I' + str(root / 'ql-application/threadx/common/include'),
+                '/Fo' + str(output / 'test_wss_handshake.obj'), '/Fe' + str(exe)], check=True)
+subprocess.run([str(exe)], check=True)