i am using stm32F429ZI nucleo board and i want to implement mqtt over LWIP,
i am able to send connect request and publish dummy data on mqtt server but after the keep alive time socket error occurs,
i have already attached systick timer with client.cyclic_tick.
In debug mode timer is working and same way client.cyclic_tick is also getting incremented.
but after the predefined keep alive time socket error occurs , may be there is an issue regarding time attachment,
i have attached my mqtt timer with systick as below:
and inside stm32f4xx_it.c