I can only test for you on mangoh green board …
Have you tried wp77 fw R14.1?
I just tested FW R14.1 on mangoh green board, I can start the WIFI in dcs:
Jan 15 07:39:28 fx30 user.debug Legato: DBUG | atQmiLinker[1194]/atQmiLinker T=unknown | atForward.c QmiAtCmdCb() 161 | Received:`at+wdss=1,1^M '
Jan 15 07:39:28 fx30 user.debug Legato: DBUG | atQmiLinker[1194]/atQmiLinker T=Writer | atLinker.c Writer() 334 | cmd: `at+wdss=1,1^M '
Jan 15 07:39:28 fx30 user.info Legato: INFO | avcDaemon[1223]/avcDaemon T=main | avcClient.c StartBearer() 969 | Start Bearer
Jan 15 07:39:28 fx30 user.info Legato: INFO | avcDaemon[1223]/avcDaemon T=main | avcClient.c avcClient_Connect() 1175 | Starting retry timer of 15 min at index 0
Jan 15 07:39:28 fx30 user.info Legato: INFO | dcsDaemon[1244]/dcsDaemon T=main | dcsTechRank.c dcsTechRank_SelectDataChannel() 239 | Selected channel name SWI-MOBILE
Jan 15 07:39:28 fx30 user.info Legato: INFO | dcsDaemon[1244]/dcs T=main | dcs.c le_dcs_AddEventHandler() 635 | Adding channel handler for channel SWI-MOBILE of technology wifi
Jan 15 07:39:28 fx30 user.info Legato: INFO | dcsDaemon[1244]/dcs T=main | dcs.c le_dcs_AddEventHandler() 675 | Event handler with reference 0xc19 and event ID 0xbcf added
Jan 15 07:39:28 fx30 user.info Legato: INFO | dcsDaemon[1244]/dcs T=main | dcs.c le_dcs_Start() 421 | Starting channel SWI-MOBILE of technology wifi by app session with reference 0x7f5abe28
Jan 15 07:39:28 fx30 user.debug Legato: DBUG | wifiService[1347]/daemon T=main | le_wifiClient.c le_wifiClient_GetCurrentConnection() 1177 | AP reference of currently selected connection: (nil)
Jan 15 07:39:28 fx30 user.debug Legato: DBUG | atQmiLinker[1194]/atQmiLinker T=Reader | atForward.c SendIntermediateResponse() 416 | ####
Jan 15 07:39:28 fx30 user.info Legato: INFO | dcsDaemon[1244]/dcs T=main | dcs.c le_dcs_Start() 478 | Initiating technology to start channel SWI-MOBILE for app session 0x7f5abe28, request reference 0x203
Jan 15 07:39:28 fx30 user.info Legato: INFO | dcsDaemon[1244]/dcsDaemon T=main | dcsServer.c TryStartTechSession() 1105 | Successfully initiated data channel SWI-MOBILE of technology 0
Jan 15 07:39:28 fx30 user.info Legato: INFO | dcsDaemon[1244]/dcs T=main | dcsTech.c le_dcsTech_Start() 338 | Request to start channel SWI-MOBILE of technology wifi
Jan 15 07:39:28 fx30 user.debug Legato: DBUG | wifiService[1347]/daemon T=main | le_wifiClient.c le_wifiClient_LoadSsid() 2003 | No wifi security protocol set at wifiService:/wifi/channel/SWI-MOBILE/secProtocol
Jan 15 07:39:28 fx30 user.debug Legato: DBUG | wifiService[1347]/daemon T=main | le_wifiClient.c WifiClient_LoadSecurityConfigs() 1882 | Successfully retrieved security parameters for protocol 0 over SSID SWI-MOBILE
Jan 15 07:39:28 fx30 user.debug Legato: DBUG | wifiService[1347]/daemon T=main | le_wifiClient.c IsScanRunning() 584 | IsScanRunning .0
Jan 15 07:39:28 fx30 user.debug Legato: DBUG | wifiService[1347]/daemon T=main | le_wifiClient.c FindAccessPointRefFromSsid() 265 | Find AP from SSID
Jan 15 07:39:28 fx30 user.debug Legato: DBUG | wifiService[1347]/daemon T=main | le_wifiClient.c le_wifiClient_Create() 1479 | AP[0x7f5a5a98 0xab] signal strength 32767 | SSID length 10 | SSID: "SWI-MOBILE"
Jan 15 07:39:28 fx30 user.debug Legato: DBUG | wifiService[1347]/daemon T=main | le_wifiClient.c le_wifiClient_SetSecurityProtocol() 1406 | Set security protocol
Jan 15 07:39:28 fx30 user.debug Legato: DBUG | wifiService[1347]/daemon T=main | pa_wifi_client.c pa_wifiClient_SetSecurityProtocol() 835 | Security protocol: 0
Jan 15 07:39:28 fx30 user.info Legato: INFO | wifiService[1347]/daemon T=main | le_wifiClient.c WifiClient_LoadSecurityConfigs() 1943 | Succeeded to set into wifiClient security parameters of protocol 0 for SSID SWI-MOBILE
Jan 15 07:39:28 fx30 user.info Legato: INFO | wifiService[1347]/daemon T=main | le_wifiClient.c le_wifiClient_LoadSsid() 2034 | Succeeded to create AP reference 0xab for SSID SWI-MOBILE
Jan 15 07:39:28 fx30 user.info Legato: INFO | dcsDaemon[1244]/dcsWifi T=main | dcsWifi.c DcsWifiClientStart() 250 | Starting Wifi client
Are we using same FW now?