Is it possible to have S110 but not more than ~30-40K size? I need to establish communication in order to upgrade firmware over BLE (UART Emulation), but without using such ~90K S110. Minimum functionality, no Security, just transferring with respond, Peripheral role. My employer want that. Please help, I go through a test period on programming job, and that is a part of a work. Writing an own stack is too hard and needs a lot of time.