B4R Question ESP8266 hang

[peacemaker]

Hi, All

Who trapped such hangs ? How to track, debug ?

My situation is so: ESP8266 is used for sensor reading via RS485. Now cable is long, 30 meters, testing stage.
3 kinds of HTTP-requests to a server:

• sending sensor data each 1 hour (settable from a server by a command)
• sending a status each 3 mins
• checking for new commands to execute (change settings or report the configurations = all settings) - each 15 seconds.

No sleep is used, but each 1 minute - the software restart. Minutes counter (with saving to RTC memory), checking the time intervals by means these minutes counter.
It is working for hours, log of the HTTP-requests shows the correct queue of requests, but sometimes only "command" requests are in the log only, 2 other HTTP-requests disappeared at all.
And after some minutes - nothing.

Now i have trapped this situation, connected by USB cable to a COM-port, ....and nothing from port. Looks like full hang. Power restart solved the situation - B4R log from port has started to show.
---------------
Any experience ? How to debug ?

 

[Erel]

The only thing that I can say is that you should add more logs to better trace the failing point.

 

[peacemaker]

But how can it be, if the 1 min software reset timer is always on, never stopped ?
And now found that during hanging, if to plug the USB cable and re-compile and re-flash the ESP - it's started OK, with log as usual, without power re-plugging.
But why not restarted by a timer for sure ?

 

[janderkan]

Are you aware of the little flaw in B4R ?
if you are using timer events you must write to the log each time.

Log(" ")

If not the timer will stop firing events after some time. The time between failure is not the same.

To make it easier to debug I only do it in production mode.

#If PROD
    Log(" ")
#End if

 

[peacemaker]

WOW ! Where this log(" ") to be placed ?

 

[janderkan]

In the Timer Tick event.

Sub timBlink_Tick

'Code'


#If PROD
    Log(" ")
#End if
End Sub

 

[peacemaker]

I will try, thanks !
I guess, any string can be logged, not only " " ?

And my 1min restart timer had and has Log() call - and it's not restarted for sure.
But the timer where 2 http-requests are called - yes, without Log(). Added, testing.

 

[candide]

one thing can block a B4R code without reset, an array issue.
in log file you have : Out of bounds error.Array length = 60, Index = 65535
and it stops...

 

[peacemaker]

Never seen such out of bounds error.
My latest test with Log() in timer sub did not help during latest hours.
Now changed 1 min timer sub, removed all conditions, for restart with minimal conditions.

Private Sub timWatchDog_Tick
    Log("WatchDog !")
    If others.isConnected Then
    Else    'no internet
        Log("WatchDog: No Internet - resetting WiFi")
        others.ResetWiFi
    End If
    'If webapi.GettingCommand = True Or HttpJob.WorkingFlag Or sensor.ReadingFlag Then    'if working - then later
    If sensor.ReadingFlag Then    'if working - then later
        CallSubPlus("Restart_Delayed", 2000, 7)   '7th point of restart
    Else
        others.restart(2)
    End If
End Sub

Private Sub Restart_Delayed(tag As Byte)
    others.restart(tag)
End Sub

 

[janderkan]

It is not Log("") it is Log(" ") (Space)
Yes, it is Log("Anything")

 

[peacemaker]

Seems, solved. And as usual the trouble root is not in B4R, but in just my code, conditions
After latest changes in timer event - all works OK

NO ! After 28 hours it hungs ! Nothing from log, nothing to server...
And many forums are with such hung, a better power filtering is required, will try.

 

[peacemaker]

SOLVED: bigger stack size and HTTP-response buffer stopped hangs.

 

[janderkan]

SOLVED: bigger stack size and HTTP-response buffer stopped hangs.

For how long

 

[peacemaker]

Hung was once per 24...30 hours only. I was checking the power supply also.
Before it was hanging with #StackBufferSize: 1000.
Now 1300.