Fixes to make 5.3.1 run without crashing.

components/base_nodemcu/user_main.c

@@ -21,6 +21,7 @@
 #include "esp_netif.h"
 #include "esp_vfs_dev.h"
 #include "esp_vfs_cdcacm.h"
+#include "esp_vfs_console.h"
 #include "esp_vfs_usb_serial_jtag.h"
 #include "driver/uart_vfs.h"
 #include "driver/usb_serial_jtag.h"
@@ -218,6 +219,8 @@ static void console_task(void *)
 
 static void console_init(void)
 {
+  esp_vfs_console_register();
+
   fflush(stdout);
   fsync(fileno(stdout));
 

components/modules/Kconfig

@@ -323,6 +323,17 @@ menu "NodeMCU modules"
         help
             Includes the WiFi module (recommended).
 
+    config NODEMCU_CMODULE_WIFI_STARTUP_DELAY
+        depends on ESP_CONSOLE_USB_CDC
+        int "WiFi start-up delay (ms)"
+        default 500
+        help
+            For some unknown reason there is an issue with allowing the
+            WiFi stack to initialise immediately when using a USB CDC
+            console (at least on the ESP32-S2). The workaround is to
+            delay the initialisation sequence by enough that whatever
+            else is needing to run gets to run first.
+
     config NODEMCU_CMODULE_WS2812
         bool "WS2812 module"
         default "n"

components/modules/wifi.c

@@ -93,22 +93,6 @@ static int wifi_stop (lua_State *L)
     0 : luaL_error (L, "failed to stop wifi, code %d", err);
 }
 
-#if defined(CONFIG_ESP_CONSOLE_USB_CDC)
-// For some unknown reason, on an S2 with USB CDC console enabled, if we allow
-// the esp_wifi_init() to run during initial startup, something Bad(tm)
-// happens and the S2 fails to enumerate on the USB bus. However, if we defer
-// the wifi initialisation, it starts up fine. This is an ugly workaround, but
-// I'm out of ideas at this point. If I use a UART console, I see no errors
-// even with the immediate init.
-static task_handle_t th;
-#endif
-
-static void do_esp_wifi_init(task_param_t p, task_prio_t)
-{
-  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
-  ESP_ERROR_CHECK(esp_wifi_init (&cfg));
-}
-
 extern void wifi_ap_init (void);
 extern void wifi_sta_init (void);
 static int wifi_init (lua_State *L)
@@ -117,11 +101,16 @@ static int wifi_init (lua_State *L)
   wifi_sta_init ();
 
 #if defined(CONFIG_ESP_CONSOLE_USB_CDC)
-  th = task_get_id(do_esp_wifi_init);
+// For some unknown reason, on an S2 with USB CDC console enabled, if we allow
-  task_post_low(th, 0);
+// the esp_wifi_init() to run during initial startup, something Bad(tm)
-#else
+// happens and the S2 fails to enumerate on the USB bus. However, if we defer
-  do_esp_wifi_init(0, 0);
+// it by half a second or so, everything works. This is an ugly workaround,
+// but I'm out of ideas at this point.
+  vTaskDelay(CONFIG_NODEMCU_CMODULE_WIFI_STARTUP_DELAY / portTICK_PERIOD_MS);
 #endif
+  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
+  ESP_ERROR_CHECK(esp_wifi_init (&cfg));
+
   return 0;
 }