forked from espressif/arduino-esp32
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathBluetoothSerial.cpp
1177 lines (1067 loc) · 39.9 KB
/
BluetoothSerial.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// Copyright 2018 Evandro Luis Copercini
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "sdkconfig.h"
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#if defined(CONFIG_BT_ENABLED) && defined(CONFIG_BLUEDROID_ENABLED)
#ifdef ARDUINO_ARCH_ESP32
#include "esp32-hal-log.h"
#endif
#include "BluetoothSerial.h"
#include "esp_bt.h"
#include "esp_bt_main.h"
#include "esp_gap_bt_api.h"
#include "esp_bt_device.h"
#include "esp_spp_api.h"
#include <esp_log.h>
#include "esp32-hal-log.h"
const char * _spp_server_name = "ESP32SPP";
#define RX_QUEUE_SIZE 512
#define TX_QUEUE_SIZE 32
#define SPP_TX_QUEUE_TIMEOUT 1000
#define SPP_TX_DONE_TIMEOUT 1000
#define SPP_CONGESTED_TIMEOUT 1000
static uint32_t _spp_client = 0;
static xQueueHandle _spp_rx_queue = NULL;
static xQueueHandle _spp_tx_queue = NULL;
static SemaphoreHandle_t _spp_tx_done = NULL;
static TaskHandle_t _spp_task_handle = NULL;
static EventGroupHandle_t _spp_event_group = NULL;
static EventGroupHandle_t _bt_event_group = NULL;
static boolean secondConnectionAttempt;
static esp_spp_cb_t * custom_spp_callback = NULL;
static BluetoothSerialDataCb custom_data_callback = NULL;
static esp_bd_addr_t current_bd_addr;
static ConfirmRequestCb confirm_request_callback = NULL;
static AuthCompleteCb auth_complete_callback = NULL;
#define INQ_LEN 0x10
#define INQ_NUM_RSPS 20
#define READY_TIMEOUT (10 * 1000)
#define SCAN_TIMEOUT (INQ_LEN * 2 * 1000)
static esp_bd_addr_t _peer_bd_addr;
static char _remote_name[ESP_BT_GAP_MAX_BDNAME_LEN + 1];
static bool _isRemoteAddressSet;
static bool _isMaster;
static esp_bt_pin_code_t _pin_code;
static int _pin_len;
static bool _isPinSet;
static bool _enableSSP;
static esp_spp_sec_t _sec_mask;
static esp_spp_role_t _role;
// start connect on ESP_SPP_DISCOVERY_COMP_EVT or save entry for getChannels
static bool _doConnect;
static std::map <int, std::string> sdpRecords;
static BTScanResultsSet scanResults;
static BTAdvertisedDeviceCb advertisedDeviceCb = nullptr;
// _spp_event_group
#define SPP_RUNNING 0x01
#define SPP_CONNECTED 0x02
#define SPP_CONGESTED 0x04
// true until OPEN successful, changes to false on CLOSE
#define SPP_DISCONNECTED 0x08
// true until connect(), changes to true on CLOSE
#define SPP_CLOSED 0x10
// _bt_event_group
#define BT_DISCOVERY_RUNNING 0x01
#define BT_DISCOVERY_COMPLETED 0x02
#define BT_SDP_RUNNING 0x04
#define BT_SDP_COMPLETED 0x08
typedef struct {
size_t len;
uint8_t data[];
} spp_packet_t;
#if (ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_INFO)
static char *bda2str(esp_bd_addr_t bda, char *str, size_t size)
{
if (bda == NULL || str == NULL || size < 18) {
return NULL;
}
uint8_t *p = bda;
snprintf(str, size, "%02x:%02x:%02x:%02x:%02x:%02x",
p[0], p[1], p[2], p[3], p[4], p[5]);
return str;
}
#endif
static bool get_name_from_eir(uint8_t *eir, char *bdname, uint8_t *bdname_len)
{
if (!eir || !bdname || !bdname_len) {
return false;
}
uint8_t *rmt_bdname, rmt_bdname_len;
*bdname = *bdname_len = rmt_bdname_len = 0;
rmt_bdname = esp_bt_gap_resolve_eir_data(eir, ESP_BT_EIR_TYPE_CMPL_LOCAL_NAME, &rmt_bdname_len);
if (!rmt_bdname) {
rmt_bdname = esp_bt_gap_resolve_eir_data(eir, ESP_BT_EIR_TYPE_SHORT_LOCAL_NAME, &rmt_bdname_len);
}
if (rmt_bdname) {
rmt_bdname_len = rmt_bdname_len > ESP_BT_GAP_MAX_BDNAME_LEN ? ESP_BT_GAP_MAX_BDNAME_LEN : rmt_bdname_len;
memcpy(bdname, rmt_bdname, rmt_bdname_len);
bdname[rmt_bdname_len] = 0;
*bdname_len = rmt_bdname_len;
return true;
}
return false;
}
static bool btSetPin() {
esp_bt_pin_type_t pin_type;
if (_isPinSet) {
if (_pin_len) {
log_i("pin set");
pin_type = ESP_BT_PIN_TYPE_FIXED;
} else {
_isPinSet = false;
log_i("pin reset");
pin_type = ESP_BT_PIN_TYPE_VARIABLE; // pin_code would be ignored (default)
}
return (esp_bt_gap_set_pin(pin_type, _pin_len, _pin_code) == ESP_OK);
}
return false;
}
static esp_err_t _spp_queue_packet(uint8_t *data, size_t len){
if(!data || !len){
log_w("No data provided");
return ESP_OK;
}
spp_packet_t * packet = (spp_packet_t*)malloc(sizeof(spp_packet_t) + len);
if(!packet){
log_e("SPP TX Packet Malloc Failed!");
return ESP_FAIL;
}
packet->len = len;
memcpy(packet->data, data, len);
if (!_spp_tx_queue || xQueueSend(_spp_tx_queue, &packet, SPP_TX_QUEUE_TIMEOUT) != pdPASS) {
log_e("SPP TX Queue Send Failed!");
free(packet);
return ESP_FAIL;
}
return ESP_OK;
}
const uint16_t SPP_TX_MAX = 330;
static uint8_t _spp_tx_buffer[SPP_TX_MAX];
static uint16_t _spp_tx_buffer_len = 0;
static bool _spp_send_buffer(){
if((xEventGroupWaitBits(_spp_event_group, SPP_CONGESTED, pdFALSE, pdTRUE, SPP_CONGESTED_TIMEOUT) & SPP_CONGESTED) != 0){
if(!_spp_client){
log_v("SPP Client Gone!");
return false;
}
log_v("SPP Write %u", _spp_tx_buffer_len);
esp_err_t err = esp_spp_write(_spp_client, _spp_tx_buffer_len, _spp_tx_buffer);
if(err != ESP_OK){
log_e("SPP Write Failed! [0x%X]", err);
return false;
}
_spp_tx_buffer_len = 0;
if(xSemaphoreTake(_spp_tx_done, SPP_TX_DONE_TIMEOUT) != pdTRUE){
log_e("SPP Ack Failed!");
return false;
}
return true;
}
log_e("SPP Write Congested!");
return false;
}
static void _spp_tx_task(void * arg){
spp_packet_t *packet = NULL;
size_t len = 0, to_send = 0;
uint8_t * data = NULL;
for (;;) {
if(_spp_tx_queue && xQueueReceive(_spp_tx_queue, &packet, portMAX_DELAY) == pdTRUE && packet){
if(packet->len <= (SPP_TX_MAX - _spp_tx_buffer_len)){
memcpy(_spp_tx_buffer+_spp_tx_buffer_len, packet->data, packet->len);
_spp_tx_buffer_len+=packet->len;
free(packet);
packet = NULL;
if(SPP_TX_MAX == _spp_tx_buffer_len || uxQueueMessagesWaiting(_spp_tx_queue) == 0){
_spp_send_buffer();
}
} else {
len = packet->len;
data = packet->data;
to_send = SPP_TX_MAX - _spp_tx_buffer_len;
memcpy(_spp_tx_buffer+_spp_tx_buffer_len, data, to_send);
_spp_tx_buffer_len = SPP_TX_MAX;
data += to_send;
len -= to_send;
if(!_spp_send_buffer()){
len = 0;
}
while(len >= SPP_TX_MAX){
memcpy(_spp_tx_buffer, data, SPP_TX_MAX);
_spp_tx_buffer_len = SPP_TX_MAX;
data += SPP_TX_MAX;
len -= SPP_TX_MAX;
if(!_spp_send_buffer()){
len = 0;
break;
}
}
if(len){
memcpy(_spp_tx_buffer, data, len);
_spp_tx_buffer_len += len;
if(uxQueueMessagesWaiting(_spp_tx_queue) == 0){
_spp_send_buffer();
}
}
free(packet);
packet = NULL;
}
} else {
log_e("Something went horribly wrong");
}
}
vTaskDelete(NULL);
_spp_task_handle = NULL;
}
static void esp_spp_cb(esp_spp_cb_event_t event, esp_spp_cb_param_t *param)
{
switch (event)
{
case ESP_SPP_INIT_EVT:
log_i("ESP_SPP_INIT_EVT");
#ifdef ESP_IDF_VERSION_MAJOR
esp_bt_gap_set_scan_mode(ESP_BT_CONNECTABLE, ESP_BT_GENERAL_DISCOVERABLE);
#else
esp_bt_gap_set_scan_mode(ESP_BT_SCAN_MODE_CONNECTABLE_DISCOVERABLE);
#endif
if (!_isMaster) {
log_i("ESP_SPP_INIT_EVT: slave: start");
esp_spp_start_srv(ESP_SPP_SEC_NONE, ESP_SPP_ROLE_SLAVE, 0, _spp_server_name);
}
xEventGroupSetBits(_spp_event_group, SPP_RUNNING);
break;
case ESP_SPP_SRV_OPEN_EVT://Server connection open
if (param->srv_open.status == ESP_SPP_SUCCESS) {
log_i("ESP_SPP_SRV_OPEN_EVT: %u", _spp_client);
if (!_spp_client){
_spp_client = param->srv_open.handle;
_spp_tx_buffer_len = 0;
} else {
secondConnectionAttempt = true;
esp_spp_disconnect(param->srv_open.handle);
}
xEventGroupClearBits(_spp_event_group, SPP_DISCONNECTED);
xEventGroupSetBits(_spp_event_group, SPP_CONNECTED);
} else {
log_e("ESP_SPP_SRV_OPEN_EVT Failed!, status:%d", param->srv_open.status);
}
break;
case ESP_SPP_CLOSE_EVT://Client connection closed
if ((param->close.async == false && param->close.status == ESP_SPP_SUCCESS) || param->close.async) {
log_i("ESP_SPP_CLOSE_EVT status:%d handle:%d close_by_remote:%d attempt %u", param->close.status,
param->close.handle, param->close.async, secondConnectionAttempt);
if(secondConnectionAttempt) {
secondConnectionAttempt = false;
} else {
_spp_client = 0;
xEventGroupSetBits(_spp_event_group, SPP_DISCONNECTED);
xEventGroupSetBits(_spp_event_group, SPP_CONGESTED);
xEventGroupSetBits(_spp_event_group, SPP_CLOSED);
}
xEventGroupClearBits(_spp_event_group, SPP_CONNECTED);
} else {
log_e("ESP_SPP_CLOSE_EVT failed!, status:%d", param->close.status);
}
break;
case ESP_SPP_CONG_EVT://connection congestion status changed
if(param->cong.cong){
xEventGroupClearBits(_spp_event_group, SPP_CONGESTED);
} else {
xEventGroupSetBits(_spp_event_group, SPP_CONGESTED);
}
log_v("ESP_SPP_CONG_EVT: %s", param->cong.cong?"CONGESTED":"FREE");
break;
case ESP_SPP_WRITE_EVT://write operation completed
if (param->write.status == ESP_SPP_SUCCESS) {
if(param->write.cong){
xEventGroupClearBits(_spp_event_group, SPP_CONGESTED);
}
log_v("ESP_SPP_WRITE_EVT: %u %s", param->write.len, param->write.cong?"CONGESTED":"");
} else {
log_e("ESP_SPP_WRITE_EVT failed!, status:%d", param->write.status);
}
xSemaphoreGive(_spp_tx_done);//we can try to send another packet
break;
case ESP_SPP_DATA_IND_EVT://connection received data
log_v("ESP_SPP_DATA_IND_EVT len=%d handle=%d", param->data_ind.len, param->data_ind.handle);
//esp_log_buffer_hex("",param->data_ind.data,param->data_ind.len); //for low level debug
//ets_printf("r:%u\n", param->data_ind.len);
if(custom_data_callback){
custom_data_callback(param->data_ind.data, param->data_ind.len);
} else if (_spp_rx_queue != NULL){
for (int i = 0; i < param->data_ind.len; i++){
if(xQueueSend(_spp_rx_queue, param->data_ind.data + i, (TickType_t)0) != pdTRUE){
log_e("RX Full! Discarding %u bytes", param->data_ind.len - i);
break;
}
}
}
break;
case ESP_SPP_DISCOVERY_COMP_EVT://discovery complete
log_i("ESP_SPP_DISCOVERY_COMP_EVT num=%d", param->disc_comp.scn_num);
if (param->disc_comp.status == ESP_SPP_SUCCESS) {
for(int i=0; i < param->disc_comp.scn_num; i++) {
log_d("ESP_SPP_DISCOVERY_COMP_EVT: spp [%d] channel: %d service name:%s", i, param->disc_comp.scn[i], param->disc_comp.service_name[0]);
}
if(_doConnect) {
if(param->disc_comp.scn_num > 0) {
#if (ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_INFO)
char bda_str[18];
log_i("ESP_SPP_DISCOVERY_COMP_EVT: spp connect to remote %s channel %d",
bda2str(_peer_bd_addr, bda_str, sizeof(bda_str)),
param->disc_comp.scn[0]);
#endif
xEventGroupClearBits(_spp_event_group, SPP_CLOSED);
if(esp_spp_connect(_sec_mask, _role, param->disc_comp.scn[0], _peer_bd_addr) != ESP_OK) {
log_e("ESP_SPP_DISCOVERY_COMP_EVT connect failed");
xEventGroupSetBits(_spp_event_group, SPP_CLOSED);
}
} else {
log_e("ESP_SPP_DISCOVERY_COMP_EVT remote doesn't offer an SPP channel");
xEventGroupSetBits(_spp_event_group, SPP_CLOSED);
}
} else {
for(int i=0; i < param->disc_comp.scn_num; i++) {
sdpRecords[param->disc_comp.scn[i]] = param->disc_comp.service_name[0];
}
}
} else {
log_e("ESP_SPP_DISCOVERY_COMP_EVT failed!, status:%d", param->disc_comp.status);
}
xEventGroupSetBits(_bt_event_group, BT_SDP_COMPLETED);
break;
case ESP_SPP_OPEN_EVT://Client connection open
log_i("ESP_SPP_OPEN_EVT");
if (!_spp_client){
_spp_client = param->open.handle;
} else {
secondConnectionAttempt = true;
esp_spp_disconnect(param->open.handle);
}
xEventGroupClearBits(_spp_event_group, SPP_DISCONNECTED);
xEventGroupSetBits(_spp_event_group, SPP_CONNECTED);
xEventGroupSetBits(_spp_event_group, SPP_CONGESTED);
break;
case ESP_SPP_START_EVT://server started
log_i("ESP_SPP_START_EVT");
break;
case ESP_SPP_CL_INIT_EVT://client initiated a connection
if (param->cl_init.status == ESP_SPP_SUCCESS) {
log_i("ESP_SPP_CL_INIT_EVT handle:%d sec_id:%d", param->cl_init.handle, param->cl_init.sec_id);
} else {
log_i("ESP_SPP_CL_INIT_EVT status:%d", param->cl_init.status);
}
break;
default:
log_i("ESP_SPP_* event unhandled %d", event);
break;
}
if(custom_spp_callback)(*custom_spp_callback)(event, param);
}
void BluetoothSerial::onData(BluetoothSerialDataCb cb){
custom_data_callback = cb;
}
static void esp_bt_gap_cb(esp_bt_gap_cb_event_t event, esp_bt_gap_cb_param_t *param)
{
switch(event){
case ESP_BT_GAP_DISC_RES_EVT: {
log_i("ESP_BT_GAP_DISC_RES_EVT properties=%d", param->disc_res.num_prop);
#if (ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_INFO)
char bda_str[18];
log_i("Scanned device: %s", bda2str(param->disc_res.bda, bda_str, 18));
#endif
BTAdvertisedDeviceSet advertisedDevice;
uint8_t peer_bdname_len = 0;
char peer_bdname[ESP_BT_GAP_MAX_BDNAME_LEN + 1];
for (int i = 0; i < param->disc_res.num_prop; i++) {
switch(param->disc_res.prop[i].type) {
case ESP_BT_GAP_DEV_PROP_EIR:
if (get_name_from_eir((uint8_t*)param->disc_res.prop[i].val, peer_bdname, &peer_bdname_len)) {
log_i("ESP_BT_GAP_DISC_RES_EVT : EIR : %s : %d", peer_bdname, peer_bdname_len);
if (strlen(_remote_name) == peer_bdname_len
&& strncmp(peer_bdname, _remote_name, peer_bdname_len) == 0) {
log_v("ESP_BT_GAP_DISC_RES_EVT : SPP_START_DISCOVERY_EIR : %s", peer_bdname, peer_bdname_len);
_isRemoteAddressSet = true;
memcpy(_peer_bd_addr, param->disc_res.bda, ESP_BD_ADDR_LEN);
esp_bt_gap_cancel_discovery();
esp_spp_start_discovery(_peer_bd_addr);
}
}
break;
case ESP_BT_GAP_DEV_PROP_BDNAME:
peer_bdname_len = param->disc_res.prop[i].len;
memcpy(peer_bdname, param->disc_res.prop[i].val, peer_bdname_len);
peer_bdname_len--; // len includes 0 terminator
log_v("ESP_BT_GAP_DISC_RES_EVT : BDNAME : %s : %d", peer_bdname, peer_bdname_len);
if (strlen(_remote_name) == peer_bdname_len
&& strncmp(peer_bdname, _remote_name, peer_bdname_len) == 0) {
log_i("ESP_BT_GAP_DISC_RES_EVT : SPP_START_DISCOVERY_BDNAME : %s", peer_bdname);
_isRemoteAddressSet = true;
memcpy(_peer_bd_addr, param->disc_res.bda, ESP_BD_ADDR_LEN);
esp_bt_gap_cancel_discovery();
esp_spp_start_discovery(_peer_bd_addr);
}
break;
case ESP_BT_GAP_DEV_PROP_COD:
if (param->disc_res.prop[i].len <= sizeof(int)) {
uint32_t cod = 0;
memcpy(&cod, param->disc_res.prop[i].val, param->disc_res.prop[i].len);
advertisedDevice.setCOD(cod);
log_d("ESP_BT_GAP_DEV_PROP_COD 0x%x", cod);
} else {
log_d("ESP_BT_GAP_DEV_PROP_COD invalid COD: Value size larger than integer");
}
break;
case ESP_BT_GAP_DEV_PROP_RSSI:
if (param->disc_res.prop[i].len <= sizeof(int)) {
uint8_t rssi = 0;
memcpy(&rssi, param->disc_res.prop[i].val, param->disc_res.prop[i].len);
log_d("ESP_BT_GAP_DEV_PROP_RSSI %d", rssi);
advertisedDevice.setRSSI(rssi);
} else {
log_d("ESP_BT_GAP_DEV_PROP_RSSI invalid RSSI: Value size larger than integer");
}
break;
default:
log_i("ESP_BT_GAP_DISC_RES_EVT unknown property [%d]:type:%d", i, param->disc_res.prop[i].type);
break;
}
if (_isRemoteAddressSet)
break;
}
if (peer_bdname_len)
advertisedDevice.setName(peer_bdname);
esp_bd_addr_t addr;
memcpy(addr, param->disc_res.bda, ESP_BD_ADDR_LEN);
advertisedDevice.setAddress(BTAddress(addr));
if (scanResults.add(advertisedDevice) && advertisedDeviceCb)
advertisedDeviceCb(&advertisedDevice);
}
break;
case ESP_BT_GAP_DISC_STATE_CHANGED_EVT:
if (param->disc_st_chg.state == ESP_BT_GAP_DISCOVERY_STOPPED) {
log_i("ESP_BT_GAP_DISC_STATE_CHANGED_EVT stopped");
xEventGroupClearBits(_bt_event_group, BT_DISCOVERY_RUNNING);
xEventGroupSetBits(_bt_event_group, BT_DISCOVERY_COMPLETED);
} else { // ESP_BT_GAP_DISCOVERY_STARTED
log_i("ESP_BT_GAP_DISC_STATE_CHANGED_EVT started");
xEventGroupClearBits(_bt_event_group, BT_DISCOVERY_COMPLETED);
xEventGroupSetBits(_bt_event_group, BT_DISCOVERY_RUNNING);
}
break;
case ESP_BT_GAP_RMT_SRVCS_EVT:
log_i( "ESP_BT_GAP_RMT_SRVCS_EVT: status = %d, num_uuids = %d", param->rmt_srvcs.stat, param->rmt_srvcs.num_uuids);
break;
case ESP_BT_GAP_RMT_SRVC_REC_EVT:
log_i("ESP_BT_GAP_RMT_SRVC_REC_EVT: status = %d", param->rmt_srvc_rec.stat);
break;
case ESP_BT_GAP_AUTH_CMPL_EVT:
if (param->auth_cmpl.stat == ESP_BT_STATUS_SUCCESS) {
log_v("authentication success: %s", param->auth_cmpl.device_name);
if (auth_complete_callback) {
auth_complete_callback(true);
}
} else {
log_e("authentication failed, status:%d", param->auth_cmpl.stat);
if (auth_complete_callback) {
auth_complete_callback(false);
}
}
break;
case ESP_BT_GAP_PIN_REQ_EVT:
// default pairing pins
log_i("ESP_BT_GAP_PIN_REQ_EVT min_16_digit:%d", param->pin_req.min_16_digit);
if (param->pin_req.min_16_digit) {
log_i("Input pin code: 0000 0000 0000 0000");
esp_bt_pin_code_t pin_code;
memset(pin_code, '0', ESP_BT_PIN_CODE_LEN);
esp_bt_gap_pin_reply(param->pin_req.bda, true, 16, pin_code);
} else {
log_i("Input pin code: 1234");
esp_bt_pin_code_t pin_code;
memcpy(pin_code, "1234", 4);
esp_bt_gap_pin_reply(param->pin_req.bda, true, 4, pin_code);
}
break;
case ESP_BT_GAP_CFM_REQ_EVT:
log_i("ESP_BT_GAP_CFM_REQ_EVT Please compare the numeric value: %d", param->cfm_req.num_val);
if (confirm_request_callback) {
memcpy(current_bd_addr, param->cfm_req.bda, sizeof(esp_bd_addr_t));
confirm_request_callback(param->cfm_req.num_val);
}
else {
esp_bt_gap_ssp_confirm_reply(param->cfm_req.bda, true);
}
break;
case ESP_BT_GAP_KEY_NOTIF_EVT:
log_i("ESP_BT_GAP_KEY_NOTIF_EVT passkey:%d", param->key_notif.passkey);
break;
case ESP_BT_GAP_KEY_REQ_EVT:
log_i("ESP_BT_GAP_KEY_REQ_EVT Please enter passkey!");
break;
case ESP_BT_GAP_CONFIG_EIR_DATA_EVT:
log_i("ESP_BT_GAP_CONFIG_EIR_DATA_EVT: stat:%d num:%d", param->config_eir_data.stat, param->config_eir_data.eir_type_num);
break;
case ESP_BT_GAP_READ_REMOTE_NAME_EVT:
if (param->read_rmt_name.stat == ESP_BT_STATUS_SUCCESS ) {
log_i("ESP_BT_GAP_READ_REMOTE_NAME_EVT: %s", param->read_rmt_name.rmt_name);
} else {
log_i("ESP_BT_GAP_READ_REMOTE_NAME_EVT: no success stat:%d", param->read_rmt_name.stat);
}
break;
case ESP_BT_GAP_MODE_CHG_EVT:
log_i("ESP_BT_GAP_MODE_CHG_EVT: mode: %d", param->mode_chg.mode);
break;
default:
log_i("ESP-BT_GAP_* unknown message: %d", event);
break;
}
}
static bool _init_bt(const char *deviceName)
{
if(!_bt_event_group){
_bt_event_group = xEventGroupCreate();
if(!_bt_event_group){
log_e("BT Event Group Create Failed!");
return false;
}
xEventGroupClearBits(_bt_event_group, 0xFFFFFF);
}
if(!_spp_event_group){
_spp_event_group = xEventGroupCreate();
if(!_spp_event_group){
log_e("SPP Event Group Create Failed!");
return false;
}
xEventGroupClearBits(_spp_event_group, 0xFFFFFF);
xEventGroupSetBits(_spp_event_group, SPP_CONGESTED);
xEventGroupSetBits(_spp_event_group, SPP_DISCONNECTED);
xEventGroupSetBits(_spp_event_group, SPP_CLOSED);
}
if (_spp_rx_queue == NULL){
_spp_rx_queue = xQueueCreate(RX_QUEUE_SIZE, sizeof(uint8_t)); //initialize the queue
if (_spp_rx_queue == NULL){
log_e("RX Queue Create Failed");
return false;
}
}
if (_spp_tx_queue == NULL){
_spp_tx_queue = xQueueCreate(TX_QUEUE_SIZE, sizeof(spp_packet_t*)); //initialize the queue
if (_spp_tx_queue == NULL){
log_e("TX Queue Create Failed");
return false;
}
}
if(_spp_tx_done == NULL){
_spp_tx_done = xSemaphoreCreateBinary();
if (_spp_tx_done == NULL){
log_e("TX Semaphore Create Failed");
return false;
}
xSemaphoreTake(_spp_tx_done, 0);
}
if(!_spp_task_handle){
xTaskCreatePinnedToCore(_spp_tx_task, "spp_tx", 4096, NULL, 10, &_spp_task_handle, 0);
if(!_spp_task_handle){
log_e("Network Event Task Start Failed!");
return false;
}
}
if (!btStarted() && !btStart()){
log_e("initialize controller failed");
return false;
}
esp_bluedroid_status_t bt_state = esp_bluedroid_get_status();
if (bt_state == ESP_BLUEDROID_STATUS_UNINITIALIZED){
if (esp_bluedroid_init()) {
log_e("initialize bluedroid failed");
return false;
}
}
if (bt_state != ESP_BLUEDROID_STATUS_ENABLED){
if (esp_bluedroid_enable()) {
log_e("enable bluedroid failed");
return false;
}
}
// Why only master need this? Slave need this during pairing as well
// if (_isMaster && esp_bt_gap_register_callback(esp_bt_gap_cb) != ESP_OK) {
if (esp_bt_gap_register_callback(esp_bt_gap_cb) != ESP_OK) {
log_e("gap register failed");
return false;
}
if (esp_spp_register_callback(esp_spp_cb) != ESP_OK){
log_e("spp register failed");
return false;
}
if (esp_spp_init(ESP_SPP_MODE_CB) != ESP_OK){
log_e("spp init failed");
return false;
}
// if (esp_bt_sleep_disable() != ESP_OK){
// log_e("esp_bt_sleep_disable failed");
// }
log_i("device name set");
esp_bt_dev_set_device_name(deviceName);
if (_isPinSet) {
log_i("pin set");
btSetPin();
}
if (_enableSSP) {
log_i("Simple Secure Pairing");
esp_bt_sp_param_t param_type = ESP_BT_SP_IOCAP_MODE;
esp_bt_io_cap_t iocap = ESP_BT_IO_CAP_IO;
esp_bt_gap_set_security_param(param_type, &iocap, sizeof(uint8_t));
}
// the default BTA_DM_COD_LOUDSPEAKER does not work with the macOS BT stack
esp_bt_cod_t cod;
cod.major = 0b00001;
cod.minor = 0b000100;
cod.service = 0b00000010110;
if (esp_bt_gap_set_cod(cod, ESP_BT_INIT_COD) != ESP_OK) {
log_e("set cod failed");
return false;
}
return true;
}
static bool _stop_bt()
{
if (btStarted()){
if(_spp_client)
esp_spp_disconnect(_spp_client);
esp_spp_deinit();
esp_bluedroid_disable();
esp_bluedroid_deinit();
btStop();
}
_spp_client = 0;
if(_spp_task_handle){
vTaskDelete(_spp_task_handle);
_spp_task_handle = NULL;
}
if(_spp_event_group){
vEventGroupDelete(_spp_event_group);
_spp_event_group = NULL;
}
if(_spp_rx_queue){
vQueueDelete(_spp_rx_queue);
//ToDo: clear RX queue when in packet mode
_spp_rx_queue = NULL;
}
if(_spp_tx_queue){
spp_packet_t *packet = NULL;
while(xQueueReceive(_spp_tx_queue, &packet, 0) == pdTRUE){
free(packet);
}
vQueueDelete(_spp_tx_queue);
_spp_tx_queue = NULL;
}
if (_spp_tx_done) {
vSemaphoreDelete(_spp_tx_done);
_spp_tx_done = NULL;
}
if (_bt_event_group) {
vEventGroupDelete(_bt_event_group);
_bt_event_group = NULL;
}
return true;
}
static bool waitForConnect(int timeout) {
TickType_t xTicksToWait = timeout / portTICK_PERIOD_MS;
// wait for connected or closed
EventBits_t rc = xEventGroupWaitBits(_spp_event_group, SPP_CONNECTED | SPP_CLOSED, pdFALSE, pdFALSE, xTicksToWait);
if((rc & SPP_CONNECTED) != 0)
return true;
else if((rc & SPP_CLOSED) != 0) {
log_d("connection closed!");
return false;
}
log_d("timeout");
return false;
}
static bool waitForDiscovered(int timeout) {
TickType_t xTicksToWait = timeout / portTICK_PERIOD_MS;
return (xEventGroupWaitBits(_spp_event_group, BT_DISCOVERY_COMPLETED, pdFALSE, pdTRUE, xTicksToWait) & BT_DISCOVERY_COMPLETED) != 0;
}
static bool waitForSDPRecord(int timeout) {
TickType_t xTicksToWait = timeout / portTICK_PERIOD_MS;
return (xEventGroupWaitBits(_bt_event_group, BT_SDP_COMPLETED, pdFALSE, pdTRUE, xTicksToWait) & BT_SDP_COMPLETED) != 0;
}
/*
* Serial Bluetooth Arduino
*
* */
BluetoothSerial::BluetoothSerial()
{
local_name = "ESP32"; //default bluetooth name
}
BluetoothSerial::~BluetoothSerial(void)
{
_stop_bt();
}
/**
* @Param isMaster set to true if you want to connect to an other device
*/
bool BluetoothSerial::begin(String localName, bool isMaster)
{
_isMaster = isMaster;
if (localName.length()){
local_name = localName;
}
return _init_bt(local_name.c_str());
}
int BluetoothSerial::available(void)
{
if (_spp_rx_queue == NULL){
return 0;
}
return uxQueueMessagesWaiting(_spp_rx_queue);
}
int BluetoothSerial::peek(void)
{
uint8_t c;
if (_spp_rx_queue && xQueuePeek(_spp_rx_queue, &c, this->timeoutTicks)){
return c;
}
return -1;
}
bool BluetoothSerial::hasClient(void)
{
return _spp_client > 0;
}
int BluetoothSerial::read()
{
uint8_t c = 0;
if (_spp_rx_queue && xQueueReceive(_spp_rx_queue, &c, this->timeoutTicks)){
return c;
}
return -1;
}
/**
* Set timeout for read / peek
*/
void BluetoothSerial::setTimeout(int timeoutMS)
{
this->timeoutTicks=timeoutMS / portTICK_PERIOD_MS;
}
size_t BluetoothSerial::write(uint8_t c)
{
return write(&c, 1);
}
size_t BluetoothSerial::write(const uint8_t *buffer, size_t size)
{
if (!_spp_client){
return 0;
}
return (_spp_queue_packet((uint8_t *)buffer, size) == ESP_OK) ? size : 0;
}
void BluetoothSerial::flush()
{
if (_spp_tx_queue != NULL){
while(uxQueueMessagesWaiting(_spp_tx_queue) > 0){
delay(100);
}
}
}
void BluetoothSerial::end()
{
_stop_bt();
}
void BluetoothSerial::onConfirmRequest(ConfirmRequestCb cb)
{
confirm_request_callback = cb;
}
void BluetoothSerial::onAuthComplete(AuthCompleteCb cb)
{
auth_complete_callback = cb;
}
void BluetoothSerial::confirmReply(boolean confirm)
{
esp_bt_gap_ssp_confirm_reply(current_bd_addr, confirm);
}
esp_err_t BluetoothSerial::register_callback(esp_spp_cb_t * callback)
{
custom_spp_callback = callback;
return ESP_OK;
}
//Simple Secure Pairing
void BluetoothSerial::enableSSP() {
_enableSSP = true;
}
/*
* Set default parameters for Legacy Pairing
* Use fixed pin code
*/
bool BluetoothSerial::setPin(const char *pin) {
log_i("pin: %s", pin);
bool isEmpty = !(pin && *pin);
if (isEmpty && !_isPinSet) {
return true; // nothing to do
} else if (!isEmpty){
_pin_len = strlen(pin);
memcpy(_pin_code, pin, _pin_len);
} else {
_pin_len = 0; // resetting pin to none (default)
}
_pin_code[_pin_len] = 0;
_isPinSet = true;
if (isReady(false, READY_TIMEOUT)) {
btSetPin();
}
return true;
}
bool BluetoothSerial::connect(String remoteName)
{
if (!isReady(true, READY_TIMEOUT)) return false;
if (remoteName && remoteName.length() < 1) {
log_e("No remote name is provided");
return false;
}
disconnect();
_doConnect = true;
_isRemoteAddressSet = false;
_sec_mask = ESP_SPP_SEC_ENCRYPT|ESP_SPP_SEC_AUTHENTICATE;
_role = ESP_SPP_ROLE_MASTER;
strncpy(_remote_name, remoteName.c_str(), ESP_BT_GAP_MAX_BDNAME_LEN);
_remote_name[ESP_BT_GAP_MAX_BDNAME_LEN] = 0;
log_i("master : remoteName");
// will first resolve name to address
#ifdef ESP_IDF_VERSION_MAJOR
esp_bt_gap_set_scan_mode(ESP_BT_CONNECTABLE, ESP_BT_GENERAL_DISCOVERABLE);
#else
esp_bt_gap_set_scan_mode(ESP_BT_SCAN_MODE_CONNECTABLE_DISCOVERABLE);
#endif
xEventGroupClearBits(_spp_event_group, SPP_CLOSED);
if (esp_bt_gap_start_discovery(ESP_BT_INQ_MODE_GENERAL_INQUIRY, INQ_LEN, INQ_NUM_RSPS) == ESP_OK) {
return waitForConnect(SCAN_TIMEOUT);
}
return false;
}
/**
* @Param channel: specify channel or 0 for auto-detect
* @Param sec_mask:
* ESP_SPP_SEC_ENCRYPT|ESP_SPP_SEC_AUTHENTICATE
* ESP_SPP_SEC_NONE
* @Param role:
* ESP_SPP_ROLE_MASTER master can handle up to 7 connections to slaves
* ESP_SPP_ROLE_SLAVE can only have one connection to a master
*/
bool BluetoothSerial::connect(uint8_t remoteAddress[], int channel, esp_spp_sec_t sec_mask, esp_spp_role_t role)
{
if (!isReady(true, READY_TIMEOUT)) return false;
if (!remoteAddress) {
log_e("No remote address is provided");
return false;
}
disconnect();
_doConnect = true;
_remote_name[0] = 0;
_isRemoteAddressSet = true;
_sec_mask = sec_mask;
_role = role;
memcpy(_peer_bd_addr, remoteAddress, ESP_BD_ADDR_LEN);
log_i("master : remoteAddress");
xEventGroupClearBits(_spp_event_group, SPP_CLOSED);
if (channel > 0) {
#if (ARDUHAL_LOG_LEVEL >= ARDUHAL_LOG_LEVEL_INFO)
char bda_str[18];
log_i("spp connect to remote %s channel %d",
bda2str(_peer_bd_addr, bda_str, sizeof(bda_str)),
channel);
#endif
if(esp_spp_connect(sec_mask, role, channel, _peer_bd_addr) != ESP_OK ) {
log_e("spp connect failed");
return false;
}
bool rc=waitForConnect(READY_TIMEOUT);
if(rc) {
log_i("connected");
} else {
if(this->isClosed()) {
log_e("connect failed");
} else {
log_e("connect timed out after %dms", READY_TIMEOUT);
}
}
return rc;
}
if (esp_spp_start_discovery(_peer_bd_addr) == ESP_OK) {
return waitForConnect(READY_TIMEOUT);
}