Libarary of sensor resources for mbed Device Service. Requires NSDL Support Libarary, etc.
Diff: sound_level.cpp
- Revision:
- 0:fe416b02628b
- Child:
- 4:bc54f10b3234
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/sound_level.cpp Wed Dec 10 14:08:28 2014 +0000 @@ -0,0 +1,99 @@ +// sound_level (from barometer) sensor resource implementation + +#include "mbed.h" +#include "nsdl_support.h" +#include "sensor_ctl.h" +#include "node_cfg.h" + + +#define SOUND_LEVEL_RES_ID "/sen/sound" +#define SOUND_LEVEL_RES_RT "Sound Level" + +#if NODE_SENSOR_STATION +static char sound_level_val[6]; +static uint8_t content_type = 50; + + +/* stored data for observable resource */ +static uint8_t obs_number = 0; +static uint8_t *obs_token_ptr = NULL; +static uint8_t obs_token_len = 0; + + + +//This is to be called from main program loop... it sends volume on request. +void sound_level_report() { + if(obs_number != 0){// && obs_token_ptr != NULL){ + obs_number++; + snprintf(sound_level_val,6,"%2.2f" ,current_ambient_noise_value); + printf("sound_level report\r\n"); + printf("sound_level: %s\r\n", sound_level_val); + if(sn_nsdl_send_observation_notification(obs_token_ptr, obs_token_len, (uint8_t*)sound_level_val, strlen(sound_level_val), &obs_number, 1, COAP_MSG_TYPE_NON_CONFIRMABLE, 0) == 0) { + printf("Sound Observation Sending Failed\r\n"); + } else { + printf("Sound Observation Sent\r\n"); + } + } +} + +/* Only GET method allowed */ +static uint8_t sound_level_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; + snprintf(sound_level_val,6,"%2.2f" ,current_ambient_noise_value); + printf("sound_level callback\r\n"); + printf("sound_level: %s\r\n", sound_level_val); + + if(received_coap_ptr->msg_code == COAP_MSG_CODE_REQUEST_GET) + { + coap_res_ptr = sn_coap_build_response(received_coap_ptr, COAP_MSG_CODE_RESPONSE_CONTENT); + + coap_res_ptr->payload_len = strlen(sound_level_val); + coap_res_ptr->payload_ptr = (uint8_t*)sound_level_val; + + coap_res_ptr->content_type_ptr = &content_type; + coap_res_ptr->content_type_len = sizeof(content_type); + + + if(received_coap_ptr->token_ptr){ + printf(" Token included\r\n"); + if(obs_token_ptr) + { + free(obs_token_ptr); + obs_token_ptr = 0; + } + obs_token_ptr = (uint8_t*)malloc(received_coap_ptr->token_len); + if(obs_token_ptr){ + memcpy(obs_token_ptr, received_coap_ptr->token_ptr, received_coap_ptr->token_len); + obs_token_len = received_coap_ptr->token_len; + } + } + + if(received_coap_ptr->options_list_ptr->observe){ + coap_res_ptr->options_list_ptr = (sn_coap_options_list_s*)malloc(sizeof(sn_coap_options_list_s)); + memset(coap_res_ptr->options_list_ptr, 0, sizeof(sn_coap_options_list_s)); + coap_res_ptr->options_list_ptr->observe_ptr = &obs_number; + coap_res_ptr->options_list_ptr->observe_len = 1; + obs_number++; + } + printf(" Send observation %d... \r\n", obs_number); + + 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_sound_level_resource(sn_nsdl_resource_info_s *resource_ptr) +{ + obs_number++; + nsdl_create_dynamic_resource(resource_ptr, sizeof(SOUND_LEVEL_RES_ID)-1, (uint8_t*)SOUND_LEVEL_RES_ID, sizeof(SOUND_LEVEL_RES_RT)-1, (uint8_t*)SOUND_LEVEL_RES_RT, 1, &sound_level_resource_cb, (SN_GRS_GET_ALLOWED)); + return 0; +} +#endif