CONFIG_LWM2M_DTLS_SUPPORT=y CONFIG_LWM2M_PEER_PORT=5684 # Select Zephyr mbedtls CONFIG_MBEDTLS=y # Special MbedTLS changes CONFIG_MBEDTLS_ENABLE_HEAP=y CONFIG_MBEDTLS_HEAP_SIZE=8192 CONFIG_MBEDTLS_SSL_MAX_CONTENT_LEN=1500 CONFIG_MBEDTLS_CIPHER_CCM_ENABLED=y # Disable RSA, we don't parse certs: saves flash/memory CONFIG_MBEDTLS_KEY_EXCHANGE_RSA_ENABLED=n # Enable PSK instead CONFIG_MBEDTLS_KEY_EXCHANGE_PSK_ENABLED=y CONFIG_NET_SOCKETS_SOCKOPT_TLS=y CONFIG_NET_SOCKETS_TLS_MAX_CONTEXTS=4 CONFIG_NET_SOCKETS_ENABLE_DTLS=y # MbedTLS needs a larger stack CONFIG_MAIN_STACK_SIZE=2048 CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048