Outline ![]()
Files ![]()
loading...
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
/* Mesh Internal Communication Example
This example code is in the Public Domain (or CC0 licensed, at your option.)
Unless required by applicable law or agreed to in writing, this
software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
CONDITIONS OF ANY KIND, either express or implied.
*/
#include <string.h>
#include <inttypes.h>
#include "esp_wifi.h"
#include "esp_mac.h"
#include "esp_event.h"
#include "esp_log.h"
#include "esp_mesh.h"
#include "nvs_flash.h"
#include "mesh_netif.h"
#include "driver/gpio.h"
#include "freertos/semphr.h"
/*******************************************************
* Macros
*******************************************************/
#define EXAMPLE_BUTTON_GPIO 0
// commands for internal mesh communication:
// <CMD> <PAYLOAD>, where CMD is one character, payload is variable dep. on command
#define CMD_KEYPRESSED 0x55
// CMD_KEYPRESSED: payload is always 6 bytes identifying address of node sending keypress event
#define CMD_ROUTE_TABLE 0x56
// CMD_KEYPRESSED: payload is a multiple of 6 listing addresses in a routing table
/*******************************************************
* Constants
*******************************************************/
static const char *MESH_TAG = "mesh_main";
static const uint8_t MESH_ID[6] = { 0x77, 0x77, 0x77, 0x77, 0x77, 0x76};
/*******************************************************
* Variable Definitions
*******************************************************/
static bool is_running = true;
static mesh_addr_t mesh_parent_addr;
static int mesh_layer = -1;
static esp_ip4_addr_t s_current_ip;
static mesh_addr_t s_route_table[CONFIG_MESH_ROUTE_TABLE_SIZE];
static int s_route_table_size = 0;
static SemaphoreHandle_t s_route_table_lock = NULL;
static uint8_t s_mesh_tx_payload[CONFIG_MESH_ROUTE_TABLE_SIZE*6+1];
/*******************************************************
* Function Declarations
*******************************************************/
// interaction with public mqtt broker
void mqtt_app_start(void);
void mqtt_app_publish(char* topic, char *publish_string);
/*******************************************************
* Function Definitions
*******************************************************/
static void initialise_button(void)
{
gpio_config_t io_conf = {0};
io_conf.intr_type = GPIO_INTR_DISABLE;
io_conf.pin_bit_mask = BIT64(EXAMPLE_BUTTON_GPIO);
io_conf.mode = GPIO_MODE_INPUT;
io_conf.pull_up_en = 1;
io_conf.pull_down_en = 0;
gpio_config(&io_conf);
}
void static recv_cb(mesh_addr_t *from, mesh_data_t *data)
{
if (data->data[0] == CMD_ROUTE_TABLE) {
int size = data->size - 1;
if (s_route_table_lock == NULL || size%6 != 0) {
ESP_LOGE(MESH_TAG, "Error in receiving raw mesh data: Unexpected size");
return;
}
xSemaphoreTake(s_route_table_lock, portMAX_DELAY);
s_route_table_size = size / 6;
for (int i=0; i < s_route_table_size; ++i) {
ESP_LOGI(MESH_TAG, "Received Routing table [%d] "
MACSTR, i, MAC2STR(data->data + 6*i + 1));
}
memcpy(&s_route_table, data->data + 1, size);
xSemaphoreGive(s_route_table_lock);
} else if (data->data[0] == CMD_KEYPRESSED) {
if (data->size != 7) {
ESP_LOGE(MESH_TAG, "Error in receiving raw mesh data: Unexpected size");
return;
}
ESP_LOGW(MESH_TAG, "Keypressed detected on node: "
MACSTR, MAC2STR(data->data + 1));
} else {
ESP_LOGE(MESH_TAG, "Error in receiving raw mesh data: Unknown command");
}
}
static void check_button(void* args)
{
static bool old_level = true;
bool new_level;
bool run_check_button = true;
initialise_button();
while (run_check_button) {
new_level = gpio_get_level(EXAMPLE_BUTTON_GPIO);
if (!new_level && old_level) {
if (s_route_table_size && !esp_mesh_is_root()) {
ESP_LOGW(MESH_TAG, "Key pressed!");
mesh_data_t data;
uint8_t *my_mac = mesh_netif_get_station_mac();
uint8_t data_to_send[6+1] = { CMD_KEYPRESSED, };
esp_err_t err;
char print[6*3+1]; // MAC addr size + terminator
memcpy(data_to_send + 1, my_mac, 6);
data.size = 7;
data.proto = MESH_PROTO_BIN;
data.tos = MESH_TOS_P2P;
data.data = data_to_send;
snprintf(print, sizeof(print),MACSTR, MAC2STR(my_mac));
mqtt_app_publish("/topic/ip_mesh/key_pressed", print);
xSemaphoreTake(s_route_table_lock, portMAX_DELAY);
for (int i = 0; i < s_route_table_size; i++) {
if (MAC_ADDR_EQUAL(s_route_table[i].addr, my_mac)) {
continue;
}
err = esp_mesh_send(&s_route_table[i], &data, MESH_DATA_P2P, NULL, 0);
ESP_LOGI(MESH_TAG, "Sending to [%d] "
MACSTR ": sent with err code: %d", i, MAC2STR(s_route_table[i].addr), err);
}
xSemaphoreGive(s_route_table_lock);
}
}
old_level = new_level;
vTaskDelay(50 / portTICK_PERIOD_MS);
}
vTaskDelete(NULL);
}
void esp_mesh_mqtt_task(void *arg)
{
is_running = true;
char *print;
mesh_data_t data;
esp_err_t err;
mqtt_app_start();
while (is_running) {
asprintf(&print, "layer:%d IP:" IPSTR, esp_mesh_get_layer(), IP2STR(&s_current_ip));
ESP_LOGI(MESH_TAG, "Tried to publish %s", print);
mqtt_app_publish("/topic/ip_mesh", print);
free(print);
if (esp_mesh_is_root()) {
esp_mesh_get_routing_table((mesh_addr_t *) &s_route_table,
CONFIG_MESH_ROUTE_TABLE_SIZE * 6, &s_route_table_size);
data.size = s_route_table_size * 6 + 1;
data.proto = MESH_PROTO_BIN;
data.tos = MESH_TOS_P2P;
s_mesh_tx_payload[0] = CMD_ROUTE_TABLE;
memcpy(s_mesh_tx_payload + 1, s_route_table, s_route_table_size*6);
data.data = s_mesh_tx_payload;
for (int i = 0; i < s_route_table_size; i++) {
err = esp_mesh_send(&s_route_table[i], &data, MESH_DATA_P2P, NULL, 0);
ESP_LOGI(MESH_TAG, "Sending routing table to [%d] "
MACSTR ": sent with err code: %d", i, MAC2STR(s_route_table[i].addr), err);
}
}
vTaskDelay(2 * 1000 / portTICK_PERIOD_MS);
}
vTaskDelete(NULL);
}
esp_err_t esp_mesh_comm_mqtt_task_start(void)
{
static bool is_comm_mqtt_task_started = false;
s_route_table_lock = xSemaphoreCreateMutex();
if (!is_comm_mqtt_task_started) {
xTaskCreate(esp_mesh_mqtt_task, "mqtt task", 3072, NULL, 5, NULL);
xTaskCreate(check_button, "check button task", 3072, NULL, 5, NULL);
is_comm_mqtt_task_started = true;
}
return ESP_OK;
}
void mesh_event_handler(void *arg, esp_event_base_t event_base,
int32_t event_id, void *event_data)
{
mesh_addr_t id = {0,};
static uint8_t last_layer = 0;
switch (event_id) {
case MESH_EVENT_STARTED: {
esp_mesh_get_id(&id);
ESP_LOGI(MESH_TAG, "<MESH_EVENT_MESH_STARTED>ID:"MACSTR"", MAC2STR(id.addr));
mesh_layer = esp_mesh_get_layer();
}
break;
case MESH_EVENT_STOPPED: {
ESP_LOGI(MESH_TAG, "<MESH_EVENT_STOPPED>");
mesh_layer = esp_mesh_get_layer();
}
break;
case MESH_EVENT_CHILD_CONNECTED: {
mesh_event_child_connected_t *child_connected = (mesh_event_child_connected_t *)event_data;
ESP_LOGI(MESH_TAG, "<MESH_EVENT_CHILD_CONNECTED>aid:%d, "MACSTR"",
child_connected->aid,
MAC2STR(child_connected->mac));
}
break;
case MESH_EVENT_CHILD_DISCONNECTED: {
mesh_event_child_disconnected_t *child_disconnected = (mesh_event_child_disconnected_t *)event_data;
ESP_LOGI(MESH_TAG, "<MESH_EVENT_CHILD_DISCONNECTED>aid:%d, "MACSTR"",
child_disconnected->aid,
MAC2STR(child_disconnected->mac));
}
break;
case MESH_EVENT_ROUTING_TABLE_ADD: {
mesh_event_routing_table_change_t *routing_table = (mesh_event_routing_table_change_t *)event_data;
ESP_LOGW(MESH_TAG, "<MESH_EVENT_ROUTING_TABLE_ADD>add %d, new:%d",
routing_table->rt_size_change,
routing_table->rt_size_new);
}
break;
case MESH_EVENT_ROUTING_TABLE_REMOVE: {
mesh_event_routing_table_change_t *routing_table = (mesh_event_routing_table_change_t *)event_data;
ESP_LOGW(MESH_TAG, "<MESH_EVENT_ROUTING_TABLE_REMOVE>remove %d, new:%d",
routing_table->rt_size_change,
routing_table->rt_size_new);
}
break;
case MESH_EVENT_NO_PARENT_FOUND: {
mesh_event_no_parent_found_t *no_parent = (mesh_event_no_parent_found_t *)event_data;
ESP_LOGI(MESH_TAG, "<MESH_EVENT_NO_PARENT_FOUND>scan times:%d",
no_parent->scan_times);
}
/* TODO handler for the failure */
break;
case MESH_EVENT_PARENT_CONNECTED: {
mesh_event_connected_t *connected = (mesh_event_connected_t *)event_data;
esp_mesh_get_id(&id);
mesh_layer = connected->self_layer;
memcpy(&mesh_parent_addr.addr, connected->connected.bssid, 6);
ESP_LOGI(MESH_TAG,
"<MESH_EVENT_PARENT_CONNECTED>layer:%d-->%d, parent:"MACSTR"%s, ID:"MACSTR"",
last_layer, mesh_layer, MAC2STR(mesh_parent_addr.addr),
esp_mesh_is_root() ? "<ROOT>" :
(mesh_layer == 2) ? "<layer2>" : "", MAC2STR(id.addr));
last_layer = mesh_layer;
mesh_netifs_start(esp_mesh_is_root());
}
break;
case MESH_EVENT_PARENT_DISCONNECTED: {
mesh_event_disconnected_t *disconnected = (mesh_event_disconnected_t *)event_data;
ESP_LOGI(MESH_TAG,
"<MESH_EVENT_PARENT_DISCONNECTED>reason:%d",
disconnected->reason);
mesh_layer = esp_mesh_get_layer();
mesh_netifs_stop();
}
break;
case MESH_EVENT_LAYER_CHANGE: {
mesh_event_layer_change_t *layer_change = (mesh_event_layer_change_t *)event_data;
mesh_layer = layer_change->new_layer;
ESP_LOGI(MESH_TAG, "<MESH_EVENT_LAYER_CHANGE>layer:%d-->%d%s",
last_layer, mesh_layer,
esp_mesh_is_root() ? "<ROOT>" :
(mesh_layer == 2) ? "<layer2>" : "");
last_layer = mesh_layer;
}
break;
case MESH_EVENT_ROOT_ADDRESS: {
mesh_event_root_address_t *root_addr = (mesh_event_root_address_t *)event_data;
ESP_LOGI(MESH_TAG, "<MESH_EVENT_ROOT_ADDRESS>root address:"MACSTR"",
MAC2STR(root_addr->addr));
}
break;
case MESH_EVENT_VOTE_STARTED: {
mesh_event_vote_started_t *vote_started = (mesh_event_vote_started_t *)event_data;
ESP_LOGI(MESH_TAG,
"<MESH_EVENT_VOTE_STARTED>attempts:%d, reason:%d, rc_addr:"MACSTR"",
vote_started->attempts,
vote_started->reason,
MAC2STR(vote_started->rc_addr.addr));
}
break;
case MESH_EVENT_VOTE_STOPPED: {
ESP_LOGI(MESH_TAG, "<MESH_EVENT_VOTE_STOPPED>");
break;
}
case MESH_EVENT_ROOT_SWITCH_REQ: {
mesh_event_root_switch_req_t *switch_req = (mesh_event_root_switch_req_t *)event_data;
ESP_LOGI(MESH_TAG,
"<MESH_EVENT_ROOT_SWITCH_REQ>reason:%d, rc_addr:"MACSTR"",
switch_req->reason,
MAC2STR( switch_req->rc_addr.addr));
}
break;
case MESH_EVENT_ROOT_SWITCH_ACK: {
/* new root */
mesh_layer = esp_mesh_get_layer();
esp_mesh_get_parent_bssid(&mesh_parent_addr);
ESP_LOGI(MESH_TAG, "<MESH_EVENT_ROOT_SWITCH_ACK>layer:%d, parent:"MACSTR"", mesh_layer, MAC2STR(mesh_parent_addr.addr));
}
break;
case MESH_EVENT_TODS_STATE: {
mesh_event_toDS_state_t *toDs_state = (mesh_event_toDS_state_t *)event_data;
ESP_LOGI(MESH_TAG, "<MESH_EVENT_TODS_REACHABLE>state:%d", *toDs_state);
}
break;
case MESH_EVENT_ROOT_FIXED: {
mesh_event_root_fixed_t *root_fixed = (mesh_event_root_fixed_t *)event_data;
ESP_LOGI(MESH_TAG, "<MESH_EVENT_ROOT_FIXED>%s",
root_fixed->is_fixed ? "fixed" : "not fixed");
}
break;
case MESH_EVENT_ROOT_ASKED_YIELD: {
mesh_event_root_conflict_t *root_conflict = (mesh_event_root_conflict_t *)event_data;
ESP_LOGI(MESH_TAG,
"<MESH_EVENT_ROOT_ASKED_YIELD>"MACSTR", rssi:%d, capacity:%d",
MAC2STR(root_conflict->addr),
root_conflict->rssi,
root_conflict->capacity);
}
break;
case MESH_EVENT_CHANNEL_SWITCH: {
mesh_event_channel_switch_t *channel_switch = (mesh_event_channel_switch_t *)event_data;
ESP_LOGI(MESH_TAG, "<MESH_EVENT_CHANNEL_SWITCH>new channel:%d", channel_switch->channel);
}
break;
case MESH_EVENT_SCAN_DONE: {
mesh_event_scan_done_t *scan_done = (mesh_event_scan_done_t *)event_data;
ESP_LOGI(MESH_TAG, "<MESH_EVENT_SCAN_DONE>number:%d",
scan_done->number);
}
break;
case MESH_EVENT_NETWORK_STATE: {
mesh_event_network_state_t *network_state = (mesh_event_network_state_t *)event_data;
ESP_LOGI(MESH_TAG, "<MESH_EVENT_NETWORK_STATE>is_rootless:%d",
network_state->is_rootless);
}
break;
case MESH_EVENT_STOP_RECONNECTION: {
ESP_LOGI(MESH_TAG, "<MESH_EVENT_STOP_RECONNECTION>");
}
break;
case MESH_EVENT_FIND_NETWORK: {
mesh_event_find_network_t *find_network = (mesh_event_find_network_t *)event_data;
ESP_LOGI(MESH_TAG, "<MESH_EVENT_FIND_NETWORK>new channel:%d, router BSSID:"MACSTR"",
find_network->channel, MAC2STR(find_network->router_bssid));
}
break;
case MESH_EVENT_ROUTER_SWITCH: {
mesh_event_router_switch_t *router_switch = (mesh_event_router_switch_t *)event_data;
ESP_LOGI(MESH_TAG, "<MESH_EVENT_ROUTER_SWITCH>new router:%s, channel:%d, "MACSTR"",
router_switch->ssid, router_switch->channel, MAC2STR(router_switch->bssid));
}
break;
default:
ESP_LOGI(MESH_TAG, "unknown id:%" PRId32 "", event_id);
break;
}
}
void ip_event_handler(void *arg, esp_event_base_t event_base,
int32_t event_id, void *event_data)
{
ip_event_got_ip_t *event = (ip_event_got_ip_t *) event_data;
ESP_LOGI(MESH_TAG, "<IP_EVENT_STA_GOT_IP>IP:" IPSTR, IP2STR(&event->ip_info.ip));
s_current_ip.addr = event->ip_info.ip.addr;
#if !CONFIG_MESH_USE_GLOBAL_DNS_IP
esp_netif_t *netif = event->esp_netif;
esp_netif_dns_info_t dns;
ESP_ERROR_CHECK(esp_netif_get_dns_info(netif, ESP_NETIF_DNS_MAIN, &dns));
mesh_netif_start_root_ap(esp_mesh_is_root(), dns.ip.u_addr.ip4.addr);
#endif
esp_mesh_comm_mqtt_task_start();
}
void app_main(void)
{
ESP_ERROR_CHECK(nvs_flash_init());
/* tcpip initialization */
ESP_ERROR_CHECK(esp_netif_init());
/* event initialization */
ESP_ERROR_CHECK(esp_event_loop_create_default());
/* crete network interfaces for mesh (only station instance saved for further manipulation, soft AP instance ignored */
ESP_ERROR_CHECK(mesh_netifs_init(recv_cb));
/* wifi initialization */
wifi_init_config_t config = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK(esp_wifi_init(&config));
ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &ip_event_handler, NULL));
ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_FLASH));
ESP_ERROR_CHECK(esp_wifi_set_ps(WIFI_PS_NONE));
ESP_ERROR_CHECK(esp_wifi_start());
/* mesh initialization */
ESP_ERROR_CHECK(esp_mesh_init());
ESP_ERROR_CHECK(esp_event_handler_register(MESH_EVENT, ESP_EVENT_ANY_ID, &mesh_event_handler, NULL));
ESP_ERROR_CHECK(esp_mesh_set_max_layer(CONFIG_MESH_MAX_LAYER));
ESP_ERROR_CHECK(esp_mesh_set_vote_percentage(1));
ESP_ERROR_CHECK(esp_mesh_set_ap_assoc_expire(10));
/* set blocking time of esp_mesh_send() to 30s, to prevent the esp_mesh_send() from permanently for some reason */
ESP_ERROR_CHECK(esp_mesh_send_block_time(30000));
mesh_cfg_t cfg = MESH_INIT_CONFIG_DEFAULT();
#if !MESH_IE_ENCRYPTED
cfg.crypto_funcs = NULL;
#endif
/* mesh ID */
memcpy((uint8_t *) &cfg.mesh_id, MESH_ID, 6);
/* router */
cfg.channel = CONFIG_MESH_CHANNEL;
cfg.router.ssid_len = strlen(CONFIG_MESH_ROUTER_SSID);
memcpy((uint8_t *) &cfg.router.ssid, CONFIG_MESH_ROUTER_SSID, cfg.router.ssid_len);
memcpy((uint8_t *) &cfg.router.password, CONFIG_MESH_ROUTER_PASSWD,
strlen(CONFIG_MESH_ROUTER_PASSWD));
/* mesh softAP */
ESP_ERROR_CHECK(esp_mesh_set_ap_authmode(CONFIG_MESH_AP_AUTHMODE));
cfg.mesh_ap.max_connection = CONFIG_MESH_AP_CONNECTIONS;
cfg.mesh_ap.nonmesh_max_connection = CONFIG_MESH_NON_MESH_AP_CONNECTIONS;
memcpy((uint8_t *) &cfg.mesh_ap.password, CONFIG_MESH_AP_PASSWD,
strlen(CONFIG_MESH_AP_PASSWD));
ESP_ERROR_CHECK(esp_mesh_set_config(&cfg));
/* mesh start */
ESP_ERROR_CHECK(esp_mesh_start());
ESP_LOGI(MESH_TAG, "mesh starts successfully, heap:%" PRId32 ", %s", esp_get_free_heap_size(),
esp_mesh_is_root_fixed() ? "root fixed" : "root not fixed");
}
Details ![]()
Show: from Types: Columns: ![]( "Show Project Names")
![]( "Show Locations")
![]( "Show Referring Symbols")
![]( "Show Scope")
This file uses the notable symbols shown below. Click anywhere in the file to view more details.