Michael Koster / Mbed 2 deprecated Weather_Station_LWM2M

LWM2M Weather Station

Dependencies:   EthernetInterfaceUpdate mbed-rtos mbed nanoservice_client_1_12_X

resources/gas_sensor.cpp@3:12c28025d4a4, 2015-04-13 (annotated)

Committer:
michaeljkoster
Date:
Mon Apr 13 22:13:56 2015 +0000
Revision:
3:12c28025d4a4
Parent:
0:2b74e0fc583d 
updated NSDL-C

Who changed what in which revision?

UserRevisionLine numberNew contents of line
michaeljkoster 0:2b74e0fc583d 1 // IPSO Prototype gas sensor resource implementation
michaeljkoster 0:2b74e0fc583d 2
michaeljkoster 0:2b74e0fc583d 3 #include "mbed.h"
michaeljkoster 0:2b74e0fc583d 4 #include "nsdl_support.h"
michaeljkoster 0:2b74e0fc583d 5
michaeljkoster 0:2b74e0fc583d 6 #define GAS_RES_ID "3300/0/5700"
michaeljkoster 0:2b74e0fc583d 7 #define GAS_RES_RT "urn:X-mbed:gas-sensor"
michaeljkoster 0:2b74e0fc583d 8
michaeljkoster 0:2b74e0fc583d 9 extern Serial pc;
michaeljkoster 0:2b74e0fc583d 10 uint8_t gas_max_age = 0;
michaeljkoster 0:2b74e0fc583d 11 uint8_t gas_content_type = 50;
michaeljkoster 0:2b74e0fc583d 12
michaeljkoster 0:2b74e0fc583d 13 AnalogIn gasSensor(A0);
michaeljkoster 0:2b74e0fc583d 14 int gas_percent;
michaeljkoster 0:2b74e0fc583d 15 char gasPctString[5];
michaeljkoster 0:2b74e0fc583d 16
michaeljkoster 0:2b74e0fc583d 17 /* Only GET method allowed */
michaeljkoster 0:2b74e0fc583d 18 static uint8_t gas_sensor_resource_cb(sn_coap_hdr_s *received_coap_ptr, sn_nsdl_addr_s *address, sn_proto_info_s * proto)
michaeljkoster 0:2b74e0fc583d 19 {
michaeljkoster 0:2b74e0fc583d 20 sn_coap_hdr_s *coap_res_ptr = 0;
michaeljkoster 0:2b74e0fc583d 21
michaeljkoster 0:2b74e0fc583d 22 if(received_coap_ptr->msg_code == COAP_MSG_CODE_REQUEST_GET)
michaeljkoster 0:2b74e0fc583d 23 {
michaeljkoster 0:2b74e0fc583d 24 gas_percent = gasSensor.read() * 100;
michaeljkoster 0:2b74e0fc583d 25 sprintf(gasPctString,"%d", gas_percent);
michaeljkoster 0:2b74e0fc583d 26 pc.printf("gas percent %s\r\n", gasPctString);
michaeljkoster 0:2b74e0fc583d 27
michaeljkoster 0:2b74e0fc583d 28 coap_res_ptr = sn_coap_build_response(received_coap_ptr, COAP_MSG_CODE_RESPONSE_CONTENT);
michaeljkoster 0:2b74e0fc583d 29
michaeljkoster 0:2b74e0fc583d 30 coap_res_ptr->payload_len = strlen(gasPctString);
michaeljkoster 0:2b74e0fc583d 31 coap_res_ptr->payload_ptr = (uint8_t*)gasPctString;
michaeljkoster 0:2b74e0fc583d 32
michaeljkoster 0:2b74e0fc583d 33 coap_res_ptr->content_type_ptr = &gas_content_type;
michaeljkoster 0:2b74e0fc583d 34 coap_res_ptr->content_type_len = sizeof(gas_content_type);
michaeljkoster 0:2b74e0fc583d 35
michaeljkoster 0:2b74e0fc583d 36 coap_res_ptr->options_list_ptr = (sn_coap_options_list_s*)nsdl_alloc(sizeof(sn_coap_options_list_s));
michaeljkoster 0:2b74e0fc583d 37 if(!coap_res_ptr->options_list_ptr)
michaeljkoster 0:2b74e0fc583d 38 {
michaeljkoster 0:2b74e0fc583d 39 pc.printf("cant alloc option list for max-age\r\n");
michaeljkoster 0:2b74e0fc583d 40 coap_res_ptr->options_list_ptr = NULL; //FIXME report error and recover
michaeljkoster 0:2b74e0fc583d 41 }
michaeljkoster 0:2b74e0fc583d 42 memset(coap_res_ptr->options_list_ptr, 0, sizeof(sn_coap_options_list_s));
michaeljkoster 0:2b74e0fc583d 43 coap_res_ptr->options_list_ptr->max_age_ptr = &gas_max_age;
michaeljkoster 0:2b74e0fc583d 44 coap_res_ptr->options_list_ptr->max_age_len = sizeof(gas_max_age);
michaeljkoster 0:2b74e0fc583d 45
michaeljkoster 0:2b74e0fc583d 46 sn_nsdl_send_coap_message(address, coap_res_ptr);
michaeljkoster 0:2b74e0fc583d 47 nsdl_free(coap_res_ptr->options_list_ptr);
michaeljkoster 0:2b74e0fc583d 48 coap_res_ptr->options_list_ptr = NULL;
michaeljkoster 0:2b74e0fc583d 49 coap_res_ptr->content_type_ptr = NULL;// parser_release below tries to free this memory
michaeljkoster 0:2b74e0fc583d 50
michaeljkoster 0:2b74e0fc583d 51 }
michaeljkoster 0:2b74e0fc583d 52
michaeljkoster 0:2b74e0fc583d 53 sn_coap_parser_release_allocated_coap_msg_mem(coap_res_ptr);
michaeljkoster 0:2b74e0fc583d 54
michaeljkoster 0:2b74e0fc583d 55 return 0;
michaeljkoster 0:2b74e0fc583d 56 }
michaeljkoster 0:2b74e0fc583d 57
michaeljkoster 0:2b74e0fc583d 58 int create_gas_sensor_resource(sn_nsdl_resource_info_s *resource_ptr)
michaeljkoster 0:2b74e0fc583d 59 {
michaeljkoster 0:2b74e0fc583d 60 nsdl_create_dynamic_resource(resource_ptr, sizeof(GAS_RES_ID)-1, (uint8_t*)GAS_RES_ID, sizeof(GAS_RES_RT)-1, (uint8_t*)GAS_RES_RT, 0, &gas_sensor_resource_cb, (SN_GRS_GET_ALLOWED));
michaeljkoster 0:2b74e0fc583d 61 return 0;
michaeljkoster 0:2b74e0fc583d 62 }