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pontus2
pontus2
Associate II
August 10, 2016
Question

Module responds to AT-config cmds but then silent.

  • August 10, 2016
  • 3 replies
  • 800 views
Posted on August 10, 2016 at 10:25

I am using my SPWFS01 together with a host controller. The host will, at startup, configure the SPWFS01 after which it will try to connect to a certain WiFi. This has worked for a long period of time but now suddently it does not work. My host sends this to the module:

AT+S.SCFG=wifi_mode,0

AT+S.SCFG=wifi_wpa_psk_text,wifipass

AT+S.SSIDTXT=wifissid

AT+S.SCFG=wifi_priv_mode,2

AT+S.SCFG=wifi_mode,1

AT&W

AT+CFUN=0

after which it performs a HW reset.

Usually, the module responds OK to everything and then boots. Now however, the response is

OK

OK

OK

OK

OK

OK

and then nothing. It appears that it responds OK to everything up until saving configuration in flash. What could be the cause of this?

Regards

    This topic has been closed for replies.

    3 replies

    Gerardo GALLUCCI
    Gerardo GALLUCCI
    ST Employee
    August 11, 2016
    Posted on August 11, 2016 at 12:46

    Check boot and reset pins

    [DEAD LINK /public/STe2ecommunities/interface/Lists/WiFi%20Modules/Flat.aspx?RootFolder=/public/STe2ecommunities/interface/Lists/WiFi%20Modules/Module%20soft%20reset&FolderCTID=0x01200200770978C69A1141439FE559EB459D75800086789498A6852D4897EA192EB1DEE909&TopicsView=https://my.st.com/public/STe2ecommunities/interface/Lists/WiFi%2520Modules/AllItems.aspx&currentviews=90]https://my.st.com/public/STe2ecommunities/interface/Lists/WiFi%20Modules/Flat.aspx?RootFolder=%2fpublic%2fSTe2ecommunities%2finterface%2fLists%2fWiFi%20Modules%2fModule%20soft%20reset&FolderCTID=0x01200200770978C69A1141439FE559EB459D75800086789498A6852D4897EA192EB1DEE909&TopicsView=https%3A%2F%2Fmy%2Est%2Ecom%2Fpublic%2FSTe2ecommunities%2Finterface%2FLists%2FWiFi%2520Modules%2FAllItems%2Easpx¤tviews=90

    pontus2
    pontus2Author
    Associate II
    August 12, 2016
    Posted on August 12, 2016 at 08:09

    This problem has been fixed and identified. When we deploy SW on the chip hosting the module it gives a lot of wierd output on UART while performing the deployment. What had happened was that I accidentally deployed new SW right while the host was configuring the module (using AT+S.SCFG..). Therefor some of this nonsense that the host spits out on UART was accidentally put in the module configuration, which made it very unresponsive, not sending any winds (since the wind-conf variables where all set to FFF..) and some variables hade real bogus values (as though they were maxed out), for example

    #  wifi_beacon_wakeup = 65535

    #  standby_time = 4294967295

    #  ip_hostname = ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ[01]ÿÿÿÿÿÿÿÿÿÿÿ

    We connected the module directly to computer, however it was very unresponsive. Once every ~50th command was actually received and OK'd by the module. We tried the HW factory reset without success so finally we just spammed AT&F until it finally received that CMD and made factory reset and was restored.

    Gerardo GALLUCCI
    Gerardo GALLUCCI
    ST Employee
    August 23, 2016
    Posted on August 23, 2016 at 21:15

    Thanks for info.

    Configuration variables corruption as been improved by CRC check in future releases. If CRC fails @ startup, AT&F is automatically issued by module itself.

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