5 Replies Latest reply on Aug 31, 2020 7:52 AM by gica_284176

    CYW943907AEVAL1F Unable to obtain IP address via DHCP

    PaMu_4747636

      Hi

       

      I'm trying to  connect my dev kit to WiFi using the WICED SDK  wiced_network_up() function and the device gets the error 4

      the function gets stuck trying to get an IP address. See stack trace below and configuration.

       

      I know this takes quite some time first time to connect in the network that I'm testing (2.4 GHz). sometimes around 20 to 40 seconds

      If I switch to the 5GHz  channel the process is successful right away

       

      Is there a way to configure the process to reattempt to get the IP several times or wait longer time before it throws the error?

       

      thanks

       

      Starting WICED Wiced_006.004.000.0061

      Platform CYW943907AEVAL1F initialised

      Started ThreadX v5.8

      WICED_core Initialized

      Initialising NetX_Duo v5.10_sp3

      Creating Packet pools

      WLAN MAC Address : C4:AC:59:98:AE:36

      WLAN Firmware    : wl0: May  2 2019 02:34:15 version 7.15.168.130 (r714231) FWID 01-7fc7cd46

      WLAN CLM         : API: 12.2 Data: 9.10.74 Compiler: 1.31.3 ClmImport: 1.36.3 Creation: 2019-05-02 02:29:29

      Joining : mynetwork

      Failed to join : mynetwork

      Joining : mynetwork

      Successfully joined : mynetwork

      Obtaining IPv4 address via DHCP

      L1420 : dhcp_client_init() : DHCP CLIENT hostname = [WICED IP]

      Unable to obtain IP address via DHCP

       

       

       

       

      /* This is the default AP the device will connect to (as a client)*/

      #define CLIENT_AP_SSID       "mynetwork"

      #define CLIENT_AP_PASSPHRASE "mynetworkpass"

      #define CLIENT_AP_BSS_TYPE   WICED_BSS_TYPE_INFRASTRUCTURE

      #define CLIENT_AP_SECURITY   WICED_SECURITY_WPA2_MIXED_PSK

      #define CLIENT_AP_CHANNEL    1

      #define CLIENT_AP_BAND       WICED_802_11_BAND_2_4GHZ

        • 1. Re: CYW943907AEVAL1F Unable to obtain IP address via DHCP
          AditiB_81

          Hi,

          Can you share your code example or provide us with the pointers to reproduce the issue? Why is it that initially it takes around 20 to 40 seconds to connect to your network? Does that happen every time or only at the initial stage?

          Thanks

          • 2. Re: CYW943907AEVAL1F Unable to obtain IP address via DHCP
            PaMu_4747636

            I have no idea why the first time it takes several seconds to join a 2.4Ghz network. Maybe it is my router. But once it is done the first time, then when I reset the dev kit it will join faster.

             

            Below is the only code I'm executing

             

            void application_start( ) {

                wiced_result_t ret = WICED_SUCCESS;

                ret = wiced_network_up( WICED_AWS_DEFAULT_INTERFACE, WICED_USE_EXTERNAL_DHCP_SERVER, NULL );

              if ( ret != WICED_SUCCESS )

                {

                    WPRINT_APP_INFO( ( " Not able to join the requested AP\n\n" ) );

                    return;

                }

            }

            • 3. Re: CYW943907AEVAL1F Unable to obtain IP address via DHCP
              AditiB_81

              Hello,

              I tried to use the same code to see if I am able to join the requested AP and obtain the IP address. Below is the snapshot attached and my device can resolve the IP address.

              I see in your previous response that you provided the details of the default AP that the device will connect to

               

              /* This is the default AP the device will connect to (as a client)*/

              #define CLIENT_AP_SSID       "mynetwork"

              #define CLIENT_AP_PASSPHRASE "mynetworkpass"

              #define CLIENT_AP_BSS_TYPE   WICED_BSS_TYPE_INFRASTRUCTURE

              #define CLIENT_AP_SECURITY   WICED_SECURITY_WPA2_MIXED_PSK

              #define CLIENT_AP_CHANNEL    1

              #define CLIENT_AP_BAND       WICED_802_11_BAND_2_4GHZ

               

              Have you added this in your main application? Or changed the SSID and PASSPHRASE in the wifi_config_dct.h? Did you used the "default wifi_config_dct.h" file in the "include" folder in WICED or added it to the application folder?

               

              Did you face the same problem with other APs as well? Did you trying changing the AP?

              Thanks

              • 4. Re: CYW943907AEVAL1F Unable to obtain IP address via DHCP
                PaMu_4747636

                I guess it is a problem with my router and how flaky is my 2.4 wifi channel.

                thanks for your answer

                • 5. Re: CYW943907AEVAL1F Unable to obtain IP address via DHCP
                  gica_284176

                  Dear PaMu

                  Maybe help you, a try for day, to have an ip from a router, with dhcp, with a random success.

                  I found that the first 3 byte on the mac, must be listed in the router, registered  from IEEE.

                  The other is your mac dependind , for the board.

                  If the first isn't listed, no answer from router.

                  Example

                  // 3 bytes Address Cypress Semiconductor from IEEE registered list

                      ETH_uniqueId[0] = 0x00 ;

                      ETH_uniqueId[1] = 0xa0 ;

                      ETH_uniqueId[2] = 0x50 ;

                      // 3 bytes my mac from psoc5lp  micro ID

                      ETH_uniqueId[3] |= CY_GET_XTND_REG8((void CYFAR *) (CYREG_FLSHID_CUST_TABLES_WAFER_NUM ));

                      ETH_uniqueId[4] =  CY_GET_XTND_REG8((void CYFAR *) (CYREG_FLSHID_CUST_TABLES_X_LOC));

                      ETH_uniqueId[5] = CY_GET_XTND_REG8((void CYFAR *) (CYREG_FLSHID_CUST_TABLES_Y_LOC)) ;

                  After this, work like a candy

                  Best Regards

                  CocoritoCocorito