LWM2M Weather Station
Dependencies: EthernetInterfaceUpdate mbed-rtos mbed nanoservice_client_1_12_X
temperature.cpp
00001 // IPSO Temperature sensor resource implementation 00002 00003 #include "mbed.h" 00004 #include "nsdl_support.h" 00005 00006 #define TEMPERATURE_RES_ID "3303/0/5700" 00007 #define TEMPERATURE_RES_RT "urn:X-ipso:temperature" 00008 00009 extern Serial pc; 00010 uint8_t temperature_max_age = 0; 00011 uint8_t temperature_content_type = 50; 00012 00013 float temperature_reading; 00014 char temperature_string[6]; 00015 00016 /* Only GET method allowed */ 00017 static uint8_t temperature_resource_cb(sn_coap_hdr_s *received_coap_ptr, sn_nsdl_addr_s *address, sn_proto_info_s * proto) 00018 { 00019 sn_coap_hdr_s *coap_res_ptr = 0; 00020 00021 if(received_coap_ptr->msg_code == COAP_MSG_CODE_REQUEST_GET) 00022 { 00023 sprintf(temperature_string,"%3.1f", temperature_reading); 00024 pc.printf("temperature: %s\r\n", temperature_string); 00025 00026 coap_res_ptr = sn_coap_build_response(received_coap_ptr, COAP_MSG_CODE_RESPONSE_CONTENT); 00027 00028 coap_res_ptr->payload_len = strlen(temperature_string); 00029 coap_res_ptr->payload_ptr = (uint8_t*)temperature_string; 00030 00031 coap_res_ptr->content_type_ptr = &temperature_content_type; 00032 coap_res_ptr->content_type_len = sizeof(temperature_content_type); 00033 00034 coap_res_ptr->options_list_ptr = (sn_coap_options_list_s*)nsdl_alloc(sizeof(sn_coap_options_list_s)); 00035 if(!coap_res_ptr->options_list_ptr) 00036 { 00037 pc.printf("cant alloc option list for max-age\r\n"); 00038 coap_res_ptr->options_list_ptr = NULL; //FIXME report error and recover 00039 } 00040 memset(coap_res_ptr->options_list_ptr, 0, sizeof(sn_coap_options_list_s)); 00041 coap_res_ptr->options_list_ptr->max_age_ptr = &temperature_max_age; 00042 coap_res_ptr->options_list_ptr->max_age_len = sizeof(temperature_max_age); 00043 00044 sn_nsdl_send_coap_message(address, coap_res_ptr); 00045 nsdl_free(coap_res_ptr->options_list_ptr); 00046 coap_res_ptr->options_list_ptr = NULL; 00047 coap_res_ptr->content_type_ptr = NULL;// parser_release below tries to free this memory 00048 00049 } 00050 00051 sn_coap_parser_release_allocated_coap_msg_mem(coap_res_ptr); 00052 00053 return 0; 00054 } 00055 00056 int create_temperature_resource(sn_nsdl_resource_info_s *resource_ptr) 00057 { 00058 nsdl_create_dynamic_resource(resource_ptr, sizeof(TEMPERATURE_RES_ID)-1, (uint8_t*)TEMPERATURE_RES_ID, sizeof(TEMPERATURE_RES_RT)-1, (uint8_t*)TEMPERATURE_RES_RT, 0, &temperature_resource_cb, (SN_GRS_GET_ALLOWED)); 00059 return 0; 00060 }
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