Hello Devanand! On Thu, 2019-05-16 at 20:41 +0530, Devanand Biradar wrote: > I have connected to mosquito cloud using Lwip via MQTT. > Using PPPOS with GSM module.
Yes, I know this can be done, because I already have done it and it works (; But now I would like to make it more error-proof and responsive - my code so far is just a dirty proof-of-concept using stupid things like global flags and polling. So what I'm asking is this - is it safe to have code like this: // this function is registered via pppapi_pppos_create(...) // it is executed from within lwIP's TCP/IP thread void pppLinkStatus(ppp_pcb* pcb, int errorCode, void* context) { if (errorCode == PPPERR_NONE) // PPP is connected successfully? mqtt_client_connect(...); else // PPP connection is lost mqtt_client_disconnect(...); } The alternative is - for example - to call mqtt_client_connect(...) until it succeeds (including the last phase done in the MQTT's connect callback) periodically, for example every 10 seconds. However - if possible - I would prefer the first version, more "event based" and not requiring a thread that would have to monitor that. Regards, FCh _______________________________________________ lwip-users mailing list lwip-users@nongnu.org https://lists.nongnu.org/mailman/listinfo/lwip-users