Problem with TinyGsmClient when there's no connection

[tkralj]

Hello all, i need some assistance from you smart people :). I am having a trouble when trying to send http request and there's no gprs connection. modem.isGprsConnected() returns true but i have deliberately disconnected connection on the gsm operators portal so i know there's no connection even though method returns true. What i want to achieve is to automatically reconnect to the gprs in the case of connection drop for what ever reason it may be. Right now there's no way i can find out that there's no connection prior to calling http and receive a timeout. i want to establish a connection prior to http call if it is possible. What do you think would it be ok solution if i always connect to gprs prior to call and disconnect from it after the call. would it be too much of overhead ?

[SRGDamia1]

What modem?

[tkralj]

hello sim800l Sent from my Samsung Galaxy smartphone.

…

-------- Original message -------- From: Sara Damiano <notifications@github.com> Date: 8/2/19 12:42 (GMT+01:00) To: vshymanskyy/TinyGSM <TinyGSM@noreply.github.com> Cc: Tomislav <tomislav@softlab.hr>, Author <author@noreply.github.com> Subject: Re: [vshymanskyy/TinyGSM] Problem with TinyGsmClient when there's no connection (#315) What modem? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#315?email_source=notifications&email_token=AH6ST2VWW2NHHL56X43LBS3QCQFQVA5CNFSM4IIYSEC2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD3NMRMA#issuecomment-517654704>, or mute the thread<https://github.com/notifications/unsubscribe-auth/AH6ST2URIFEVVMQYRU4656TQCQFQVANCNFSM4IIYSECQ>.

[SRGDamia1]

I'm not really sure how to help you. If isGprsConnected() returns true, then the SIM800 thinks it is still attached to GPRS and still has an ip address. I don't know how to "tell" it otherwise or how to work around it telling lies.

Could you post an AT log showing what's happening?

[tkralj]

hi. that is exactly the problem. sim thinks its connected but it isn't (isNetworkConnected behaves the same) and if you issue http request in this state everything freezes until the timeout . is there any reliable method of checking sim connectivity ? i would like to test it before issuing http requests so i can reconnect in advance if necessary. Sent from my Samsung Galaxy smartphone.

…

-------- Original message -------- From: Sara Damiano <notifications@github.com> Date: 8/2/19 16:56 (GMT+01:00) To: vshymanskyy/TinyGSM <TinyGSM@noreply.github.com> Cc: Tomislav <tomislav@softlab.hr>, Author <author@noreply.github.com> Subject: Re: [vshymanskyy/TinyGSM] Problem with TinyGsmClient when there's no connection (#315) I'm not really sure how to help you. If isGprsConnected() returns true, then the SIM800 thinks it is still attached to GPRS and still has an ip address. I don't know how to "tell" it otherwise. Could you post an AT log showing what's happening? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub<#315?email_source=notifications&email_token=AH6ST2RDGPKF4Y2DQMAT6SDQCRDKRA5CNFSM4IIYSEC2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD3N7OBY#issuecomment-517732103>, or mute the thread<https://github.com/notifications/unsubscribe-auth/AH6ST2UWOND63GVSFDC54C3QCRDKRANCNFSM4IIYSECQ>.

[SRGDamia1]

I don't know of any way.

[marcosdepo]

try to send AT+CIPSTATUS to gsm module, if its disconnected will response with ERROR or IP INITIAL