LWM2M Weather Station
Dependencies: EthernetInterfaceUpdate mbed-rtos mbed nanoservice_client_1_12_X
resources/barometer.cpp
- Committer:
- michaeljkoster
- Date:
- 2015-04-13
- Revision:
- 3:12c28025d4a4
- Parent:
- 0:2b74e0fc583d
File content as of revision 3:12c28025d4a4:
// IPSO Barometer sensor resource implementation #include "mbed.h" #include "nsdl_support.h" #define BAROMETER_RES_ID "3315/0/5700" #define BAROMETER_RES_RT "urn:X-ipso:barometer" extern Serial pc; uint8_t barometer_max_age = 0; uint8_t barometer_content_type = 50; float barometer_reading; char barometer_string[7]; /* Only GET method allowed */ static uint8_t barometer_resource_cb(sn_coap_hdr_s *received_coap_ptr, sn_nsdl_addr_s *address, sn_proto_info_s * proto) { sn_coap_hdr_s *coap_res_ptr = 0; if(received_coap_ptr->msg_code == COAP_MSG_CODE_REQUEST_GET) { sprintf(barometer_string,"%4.2f", barometer_reading); pc.printf("barometer: %s\r\n", barometer_string); coap_res_ptr = sn_coap_build_response(received_coap_ptr, COAP_MSG_CODE_RESPONSE_CONTENT); coap_res_ptr->payload_len = strlen(barometer_string); coap_res_ptr->payload_ptr = (uint8_t*)barometer_string; coap_res_ptr->content_type_ptr = &barometer_content_type; coap_res_ptr->content_type_len = sizeof(barometer_content_type); coap_res_ptr->options_list_ptr = (sn_coap_options_list_s*)nsdl_alloc(sizeof(sn_coap_options_list_s)); if(!coap_res_ptr->options_list_ptr) { pc.printf("cant alloc option list for max-age\r\n"); coap_res_ptr->options_list_ptr = NULL; //FIXME report error and recover } memset(coap_res_ptr->options_list_ptr, 0, sizeof(sn_coap_options_list_s)); coap_res_ptr->options_list_ptr->max_age_ptr = &barometer_max_age; coap_res_ptr->options_list_ptr->max_age_len = sizeof(barometer_max_age); sn_nsdl_send_coap_message(address, coap_res_ptr); nsdl_free(coap_res_ptr->options_list_ptr); coap_res_ptr->options_list_ptr = NULL; coap_res_ptr->content_type_ptr = NULL;// parser_release below tries to free this memory } sn_coap_parser_release_allocated_coap_msg_mem(coap_res_ptr); return 0; } int create_barometer_resource(sn_nsdl_resource_info_s *resource_ptr) { nsdl_create_dynamic_resource(resource_ptr, sizeof(BAROMETER_RES_ID)-1, (uint8_t*)BAROMETER_RES_ID, sizeof(BAROMETER_RES_RT)-1, (uint8_t*)BAROMETER_RES_RT, 0, &barometer_resource_cb, (SN_GRS_GET_ALLOWED)); return 0; }