extmod/network_ninaw10: Set the proper security mode if none provided.

If no security mode is provided, use WPA for station and WEP for AP.  Note
only WEP is supported in AP mode.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>

extmod/network_ninaw10.c

@@ -260,7 +260,7 @@ static mp_obj_t network_ninaw10_connect(mp_uint_t n_args, const mp_obj_t *pos_ar
     static const mp_arg_t allowed_args[] = {
         { MP_QSTR_ssid,     MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
         { MP_QSTR_key,      MP_ARG_OBJ, {.u_obj = mp_const_none} },
-        { MP_QSTR_security, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = NINA_SEC_WPA_PSK} },
+        { MP_QSTR_security, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = -1} },
         { MP_QSTR_channel,  MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 1} },
     };
 
@@ -276,15 +276,21 @@ static mp_obj_t network_ninaw10_connect(mp_uint_t n_args, const mp_obj_t *pos_ar
         mp_raise_msg(&mp_type_OSError, MP_ERROR_TEXT("SSID can't be empty!"));
     }
 
-    // get key and sec
+    // get encryption key
     const char *key = NULL;
-    mp_uint_t security = NINA_SEC_OPEN;
-
     if (args[ARG_key].u_obj != mp_const_none) {
         key = mp_obj_str_get_str(args[ARG_key].u_obj);
-        security = args[ARG_security].u_int;
     }
 
+    // get security mode
+    mp_uint_t security = args[ARG_security].u_int;
+    if (security == -1 && self->itf == MOD_NETWORK_STA_IF) {
+        security = NINA_SEC_WPA_PSK;
+    } else if (security == -1 && self->itf == MOD_NETWORK_AP_IF) {
+        security = NINA_SEC_WEP;
+    }
+
+    // Ensure that the key is not empty if a security mode is used.
     if (security != NINA_SEC_OPEN && strlen(key) == 0) {
         mp_raise_msg(&mp_type_OSError, MP_ERROR_TEXT("Key can't be empty!"));
     }
@@ -316,7 +322,7 @@ static mp_obj_t network_ninaw10_connect(mp_uint_t n_args, const mp_obj_t *pos_ar
         mp_uint_t channel = args[ARG_channel].u_int;
 
         if (security != NINA_SEC_OPEN && security != NINA_SEC_WEP) {
-            mp_raise_msg(&mp_type_OSError, MP_ERROR_TEXT("AP mode supports WEP security only."));
+            mp_raise_msg(&mp_type_OSError, MP_ERROR_TEXT("AP mode only supports WEP or OPEN security modes"));
         }
 
         // Initialize WiFi in AP mode.