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xiaomiscan.cpp
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xiaomiscan.cpp
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//
// Intel Edison Playground
// Copyright (c) 2015 Damian Kołakowski. All rights reserved.
//
// g++ -std=c++11 -o xiaomiscan xiaomiscan.cpp `pkg-config --cflags ncurses` -lbluetooth -lncurses
#include <stdlib.h>
#include <errno.h>
#include <curses.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>
#include <bluetooth/hci_lib.h>
struct hci_request ble_hci_request(uint16_t ocf, int clen, void * status, void * cparam)
{
struct hci_request rq;
memset(&rq, 0, sizeof(rq));
rq.ogf = OGF_LE_CTL;
rq.ocf = ocf;
rq.cparam = cparam;
rq.clen = clen;
rq.rparam = status;
rq.rlen = 1;
return rq;
}
int main()
{
int ret, status;
// Get HCI device.
const int device = hci_open_dev(hci_get_route(NULL));
if ( device < 0 ) {
perror("Failed to open HCI device.");
return 0;
}
// Set BLE scan parameters.
le_set_scan_parameters_cp scan_params_cp;
memset(&scan_params_cp, 0, sizeof(scan_params_cp));
scan_params_cp.type = 0x00;
scan_params_cp.interval = htobs(0x0010);
scan_params_cp.window = htobs(0x0010);
scan_params_cp.own_bdaddr_type = 0x00; // Public Device Address (default).
scan_params_cp.filter = 0x00; // Accept all.
struct hci_request scan_params_rq = ble_hci_request(OCF_LE_SET_SCAN_PARAMETERS, LE_SET_SCAN_PARAMETERS_CP_SIZE, &status, &scan_params_cp);
ret = hci_send_req(device, &scan_params_rq, 1000);
if ( ret < 0 ) {
hci_close_dev(device);
perror("Failed to set scan parameters data.");
return 0;
}
// Set BLE events report mask.
le_set_event_mask_cp event_mask_cp;
memset(&event_mask_cp, 0, sizeof(le_set_event_mask_cp));
int i = 0;
for ( i = 0 ; i < 8 ; i++ ) event_mask_cp.mask[i] = 0xFF;
struct hci_request set_mask_rq = ble_hci_request(OCF_LE_SET_EVENT_MASK, LE_SET_EVENT_MASK_CP_SIZE, &status, &event_mask_cp);
ret = hci_send_req(device, &set_mask_rq, 1000);
if ( ret < 0 ) {
hci_close_dev(device);
perror("Failed to set event mask.");
return 0;
}
// Enable scanning.
le_set_scan_enable_cp scan_cp;
memset(&scan_cp, 0, sizeof(scan_cp));
scan_cp.enable = 0x01; // Enable flag.
scan_cp.filter_dup = 0x00; // Filtering disabled.
struct hci_request enable_adv_rq = ble_hci_request(OCF_LE_SET_SCAN_ENABLE, LE_SET_SCAN_ENABLE_CP_SIZE, &status, &scan_cp);
ret = hci_send_req(device, &enable_adv_rq, 1000);
if ( ret < 0 ) {
hci_close_dev(device);
perror("Failed to enable scan.");
return 0;
}
// Get Results.
struct hci_filter nf;
hci_filter_clear(&nf);
hci_filter_set_ptype(HCI_EVENT_PKT, &nf);
hci_filter_set_event(EVT_LE_META_EVENT, &nf);
if ( setsockopt(device, SOL_HCI, HCI_FILTER, &nf, sizeof(nf)) < 0 ) {
hci_close_dev(device);
perror("Could not set socket options\n");
return 0;
}
printf("Scanning....\n");
uint8_t buf[HCI_MAX_EVENT_SIZE];
evt_le_meta_event * meta_event;
le_advertising_info * info;
int len;
while ( 1 ) {
len = read(device, buf, sizeof(buf));
if ( len >= HCI_EVENT_HDR_SIZE ) {
meta_event = (evt_le_meta_event*)(buf + HCI_EVENT_HDR_SIZE + 1);
if ( meta_event->subevent == EVT_LE_ADVERTISING_REPORT ) {
uint8_t reports_count = meta_event->data[0];
void * offset = meta_event->data + 1;
while ( reports_count-- ) {
info = (le_advertising_info *)offset;
char addr[18];
ba2str(&(info->bdaddr), addr);
// printf("%s - RSSI %d\n", addr, (char)info->data[info->length]);
offset = info->data + info->length + 2;
// printf("data: ");
// for (int i = 0; i < info->length; ++i) {
// printf("%02x", (char)info->data[i]);
// }
// printf("\n");
unsigned char type, length, *value;
int iter = 0;
do {
type = length = -1;
value = nullptr;
if ( iter < info->length )
length = info->data[iter++];
if ( iter < info->length )
type = info->data[iter++];
if ( length != -1 && type != -1 && iter + length - 1 <= info->length ) {
value = info->data + iter;
iter += length - 1;
}
if ( value ) {
if ( type == 0x16 ) {
unsigned short vendor = -1;
if ( length >= 18 && value[0] == 0x95 && value[1] == 0xFE /* Xiaomi Inc */) {
int measure_type = value[13];
int measure_length = value[15];
unsigned char mac[6] = { value[12], value[11], value[10], value[9], value[8], value[7] };
int message_id = value[6];
printf("{ \"id\": %d, \"mac\":\"%02x%02x%02x%02x%02x%02x\", \"type\": %d",
message_id,
mac[0], mac[1], mac[2], mac[3], mac[4], mac[5],
measure_type);
enum MeasureType {
TemperatureHumidity = 0x0D,
Battery = 0x0A,
Humidity = 0x06,
Temperature = 0x04,
};
if ( measure_type == TemperatureHumidity && measure_length == 4 && length == 21 ) {
const int temperature = (int(value[17]) << 8) + value[16];
const int humidity = (int(value[19]) << 8) + value[18];
printf(", \"temperature\": %d.%01d, \"humidity\": %d.%d }",
temperature / 10, temperature % 10,
humidity / 10, humidity % 10);
} else if ( measure_type == Battery && measure_length == 1 && length == 18 ) {
const int battery = value[16];
printf(", \"battery\": %d }", battery);
} else if ( measure_type == Humidity && measure_length == 2 && length == 19 ) {
const int humidity = (int(value[17]) << 8) + value[16];
printf(", \"humidity\": %d.%01d }", humidity / 10, humidity % 10);
} else if ( measure_type == Temperature && measure_length == 2 && length == 19 ) {
const int temperature = (int(value[17]) << 8) + value[16];
printf(", \"temperature\": %d.%01d }", temperature / 10, temperature % 10);
} else if ( measure_type == TemperatureHumidity && measure_length == 4 && length == 25 ) {
const int temperature = (int(value[17]) << 8) + value[16];
const int humidity = (int(value[19]) << 8) + value[18];
const int battery = value[23];
printf(", \"temperature\": %d.%01d, \"humidity\": %d.%d, \"battery\": %d }",
temperature / 10, temperature % 10,
humidity / 10, humidity % 10,
battery);
} else if ( measure_type == Humidity && measure_length == 2 && length == 23 ) {
const int humidity = (int(value[17]) << 8) + value[16];
const int battery = value[21];
printf(", \"humidity\": %d.%01d, \"battery\": %d }", humidity / 10, humidity % 10, battery);
} else if ( measure_type == Temperature && measure_length == 2 && length == 23 ) {
const int temperature = (int(value[17]) << 8) + value[16];
const int battery = value[21];
printf(", \"temperature\": %d.%01d, \"battery\": %d }", temperature / 10, temperature % 10, battery);
} else {
printf(" }");
}
printf("\n");
fflush(stdout);
}
}
}
} while ( value != nullptr );
}
}
}
}
// Disable scanning.
memset(&scan_cp, 0, sizeof(scan_cp));
scan_cp.enable = 0x00; // Disable flag.
struct hci_request disable_adv_rq = ble_hci_request(OCF_LE_SET_SCAN_ENABLE, LE_SET_SCAN_ENABLE_CP_SIZE, &status, &scan_cp);
ret = hci_send_req(device, &disable_adv_rq, 1000);
if ( ret < 0 ) {
hci_close_dev(device);
perror("Failed to disable scan.");
return 0;
}
hci_close_dev(device);
return 0;
}