The freenode PIC microcontroller community | Microchip TCP IP Stack v6 doesn't support pic18 anymore. For pic18, you must stay with 5.4x version. Version 6.x add support for ipv6 and bigger SSL keysize ( 1024bit on pic24, 2048 on pic32 ). Bad news is that version 5.x will not receive any new developement, only bug fixes, so, no ipv6 (for example) | Please help _unreal_