Do not #undef in example project-conf.h (IPSO objects)
#define IPSO_TEMPERATURE example_ipso_temperature
/* Increase rpl-border-router IP-buffer when using more than 64. */
-#undef REST_MAX_CHUNK_SIZE
#define REST_MAX_CHUNK_SIZE 64
/* Multiplies with chunk size, be aware of memory constraints. */
-#undef COAP_MAX_OPEN_TRANSACTIONS
#define COAP_MAX_OPEN_TRANSACTIONS 4
/* Filtering .well-known/core per query can be disabled to save space. */
-#undef COAP_LINK_FORMAT_FILTERING
#define COAP_LINK_FORMAT_FILTERING 0
-#undef COAP_PROXY_OPTION_PROCESSING
#define COAP_PROXY_OPTION_PROCESSING 0
/* Enable client-side support for COAP observe */
