The CoAP utils library is a simple module that enables communication with devices that support the CoAP protocol. It allows sending and receiving non-confirmable CoAP requests.
coap_init(), the library opens a socket for receiving UDP packets for IPv4 or IPv6 connections, depending on the
At this point, you can start sending CoAP non-confirmable requests, to which you will receive answers depending on the server configuration.
- group coap_utils
void coap_init(int ip_family, struct sockaddr *addr)
Open socket and start the receiving thread.
ip_family – [in] Network ip protocol family (AF_INET or AF_INET6).
addr – [in] Local address to bind for receiving data. Pass NULL pointer if no address is provided.
int coap_send_request(enum coap_method method, const struct sockaddr *addr, const char *const *uri_path_options, uint8_t *payload, uint16_t payload_size, coap_reply_t reply_cb)
Send CoAP non-confirmable request.
method – [in] CoAP method type.
addr – [in] pointer to socket address struct for IPv6.
uri_path_options – [in] pointer to CoAP URI schemes option.
payload – [in] pointer to the CoAP message payload.
payload_size – [in] size of the CoAP message payload.
reply_cb – [in] function to call when the response comes.
>= – 0 On success.
< – 0 On failure.
- void coap_init(int ip_family, struct sockaddr *addr)