cc3200: Append last 2 bytes of the MAC address to the default SSID.

cc3200/mods/modwlan.c

@@ -426,7 +426,7 @@ void wlan_first_start (void) {
 }
 
 modwlan_Status_t wlan_sl_enable (SlWlanMode_t mode, const char *ssid, uint8_t ssid_len, uint8_t sec,
-                                 const char *key, uint8_t key_len, uint8_t channel) {
+                                 const char *key, uint8_t key_len, uint8_t channel, bool append_mac) {
 
     if (mode == ROLE_STA || mode == ROLE_AP || mode == ROLE_P2P) {
         // stop the servers
@@ -477,9 +477,14 @@ modwlan_Status_t wlan_sl_enable (SlWlanMode_t mode, const char *ssid, uint8_t ss
             ASSERT (ssid != NULL && key != NULL);
             ASSERT_ON_ERROR(sl_WlanSet(SL_WLAN_CFG_GENERAL_PARAM_ID, WLAN_GENERAL_PARAM_OPT_AP_TX_POWER, sizeof(ucPower),
                                        (unsigned char *)&ucPower));
-            ASSERT_ON_ERROR(sl_WlanSet(SL_WLAN_CFG_AP_ID, WLAN_AP_OPT_SSID, ssid_len, (unsigned char *)ssid));
             memcpy(wlan_obj.ssid, (unsigned char *)ssid, ssid_len);
-            wlan_obj.ssid[ssid_len] = '\0';
+            // append the last 2 bytes of the MAC address, since the use of this functionality is under our controll
+            // we can assume that the lenght of the ssid is less than (32 - 5)
+            if (append_mac) {
+                snprintf((char *)&wlan_obj.ssid[ssid_len], sizeof(wlan_obj.ssid) - ssid_len, "-%02x%02x", wlan_obj.mac[4], wlan_obj.mac[5]);
+                ssid_len += 5;
+            }
+            ASSERT_ON_ERROR(sl_WlanSet(SL_WLAN_CFG_AP_ID, WLAN_AP_OPT_SSID, ssid_len, (unsigned char *)wlan_obj.ssid));
             ASSERT_ON_ERROR(sl_WlanSet(SL_WLAN_CFG_AP_ID, WLAN_AP_OPT_SECURITY_TYPE, sizeof(uint8_t), &sec));
             ASSERT_ON_ERROR(sl_WlanSet(SL_WLAN_CFG_AP_ID, WLAN_AP_OPT_PASSWORD, key_len, (unsigned char *)key));
             _u8*  country = (_u8*)"EU";
@@ -687,24 +692,29 @@ STATIC mp_obj_t wlan_init_helper(mp_uint_t n_args, const mp_obj_t *pos_args, mp_
     // get the ssid
     mp_uint_t ssid_len;
     const char *ssid = mp_obj_str_get_data(args[1].u_obj, &ssid_len);
+    if (ssid_len > 32) {
+        goto arg_error;
+    }
 
     // get the key
     mp_uint_t key_len;
     const char *key = mp_obj_str_get_data(args[3].u_obj, &key_len);
-
     if (key_len < 8) {
-        nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
+        goto arg_error;
     }
 
     // force the channel to be between 1-11
     uint8_t channel = args[4].u_int;
     channel = (channel > 0 && channel != 12) ? channel % 12 : 1;
 
-    if (MODWLAN_OK != wlan_sl_enable (args[0].u_int, ssid, ssid_len, args[2].u_int, key, key_len, channel)) {
+    if (MODWLAN_OK != wlan_sl_enable (args[0].u_int, ssid, ssid_len, args[2].u_int, key, key_len, channel, false)) {
         nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_operation_failed));
     }
 
     return mp_const_none;
+
+arg_error:
+    nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
 }
 
 STATIC void wlan_lpds_callback_enable (mp_obj_t self_in) {
@@ -750,7 +760,7 @@ STATIC mp_obj_t wlan_make_new (mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_k
         }
         // TODO only STA mode supported for the moment. What if P2P?
         else if (n_args == 1) {
-            if (MODWLAN_OK != wlan_sl_enable (mode, NULL, 0, 0, NULL, 0, 0)) {
+            if (MODWLAN_OK != wlan_sl_enable (mode, NULL, 0, 0, NULL, 0, 0, false)) {
                 nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_operation_failed));
             }
         }

cc3200/mods/modwlan.h

@@ -55,7 +55,7 @@ extern _SlLockObj_t wlan_LockObj;
  ******************************************************************************/
 extern void wlan_pre_init (void);
 extern modwlan_Status_t wlan_sl_enable (SlWlanMode_t mode, const char *ssid, uint8_t ssid_len, uint8_t sec,
-                                        const char *key, uint8_t key_len, uint8_t channel);
+                                        const char *key, uint8_t key_len, uint8_t channel, bool append_mac);
 extern void wlan_first_start (void);
 extern void wlan_update(void);
 extern void wlan_stop (uint32_t timeout);

cc3200/mptask.c

@@ -372,9 +372,9 @@ STATIC void mptask_init_sflash_filesystem (void) {
 }
 
 STATIC void mptask_enter_ap_mode (void) {
-    // enable simplelink in low power mode
+    // enable simplelink in ap mode (use the MAC address to make the ssid unique)
     wlan_sl_enable (ROLE_AP, MICROPY_PORT_WLAN_AP_SSID, strlen(MICROPY_PORT_WLAN_AP_SSID), MICROPY_PORT_WLAN_AP_SECURITY,
-                    MICROPY_PORT_WLAN_AP_KEY, strlen(MICROPY_PORT_WLAN_AP_KEY), MICROPY_PORT_WLAN_AP_CHANNEL);
+                    MICROPY_PORT_WLAN_AP_KEY, strlen(MICROPY_PORT_WLAN_AP_KEY), MICROPY_PORT_WLAN_AP_CHANNEL, true);
 }
 
 STATIC void mptask_create_main_py (void) {

docs/wipy/general.rst

@@ -5,11 +5,11 @@ WLAN default behaviour
 ----------------------
 
 When the WiPy boots with the default factory configuration starts in Access Point 
-mode with ``ssid: wipy-wlan`` and ``key: www.wipy.io``. 
+mode with ``ssid`` that starts with: ``wipy-wlan`` and ``key: www.wipy.io``. 
 Connect to this network and the WiPy will be reachable at ``192.168.1.1``. In order
 to gain access to the interactive prompt, open a telnet session to that IP address on
 the default port (23). You will be asked for credentials:
-``login: micro``  ``password: python``
+``login: micro`` and ``password: python``
 
 Local file system and SD card
 -----------------------------
@@ -26,7 +26,7 @@ that should be located in the SD card.
 The file system is accessible via the native FTP server running in the WiPy. 
 Open your FTP client of choice and connect to:
 
-``ftp://192.168.1.1`` ``user: micro``  ``password: python``
+``ftp://192.168.1.1``, ``user: micro``, ``password: python``
 
 Boot modes
 ----------
@@ -75,5 +75,5 @@ There are currently 2 kinds of errors that you might see:
 1. If the heart beat LED flashes quickly, then a Python script(eg ``main.py``) 
    has an error.  Use the REPL to debug it.
 2. If the heart beat LED stays on, then there was a hard fault, you cannot
-   recover from this, the only way out is by pressing the reset switch.
+   recover from this, the only way out is to press the reset switch.