esp-idf/examples/mesh/internal_communication/main/mesh_main.c

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/* Mesh Internal Communication Example
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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 "esp_wifi.h"
#include "esp_system.h"
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#include "esp_event.h"
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#include "esp_log.h"
#include "esp_mesh.h"
#include "esp_mesh_internal.h"
#include "mesh_light.h"
#include "nvs_flash.h"
/*******************************************************
* Macros
*******************************************************/
/*******************************************************
* Constants
*******************************************************/
#define RX_SIZE (1500)
#define TX_SIZE (1460)
/*******************************************************
* Variable Definitions
*******************************************************/
static const char *MESH_TAG = "mesh_main";
static const uint8_t MESH_ID[6] = { 0x77, 0x77, 0x77, 0x77, 0x77, 0x77};
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static uint8_t tx_buf[TX_SIZE] = { 0, };
static uint8_t rx_buf[RX_SIZE] = { 0, };
static bool is_running = true;
static bool is_mesh_connected = false;
static mesh_addr_t mesh_parent_addr;
static int mesh_layer = -1;
static esp_netif_t *netif_sta = NULL;
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mesh_light_ctl_t light_on = {
.cmd = MESH_CONTROL_CMD,
.on = 1,
.token_id = MESH_TOKEN_ID,
.token_value = MESH_TOKEN_VALUE,
};
mesh_light_ctl_t light_off = {
.cmd = MESH_CONTROL_CMD,
.on = 0,
.token_id = MESH_TOKEN_ID,
.token_value = MESH_TOKEN_VALUE,
};
/*******************************************************
* Function Declarations
*******************************************************/
/*******************************************************
* Function Definitions
*******************************************************/
void esp_mesh_p2p_tx_main(void *arg)
{
int i;
esp_err_t err;
int send_count = 0;
mesh_addr_t route_table[CONFIG_MESH_ROUTE_TABLE_SIZE];
int route_table_size = 0;
mesh_data_t data;
data.data = tx_buf;
data.size = sizeof(tx_buf);
data.proto = MESH_PROTO_BIN;
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data.tos = MESH_TOS_P2P;
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is_running = true;
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while (is_running) {
/* non-root do nothing but print */
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if (!esp_mesh_is_root()) {
ESP_LOGI(MESH_TAG, "layer:%d, rtableSize:%d, %s", mesh_layer,
esp_mesh_get_routing_table_size(),
(is_mesh_connected && esp_mesh_is_root()) ? "ROOT" : is_mesh_connected ? "NODE" : "DISCONNECT");
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vTaskDelay(10 * 1000 / portTICK_RATE_MS);
continue;
}
esp_mesh_get_routing_table((mesh_addr_t *) &route_table,
CONFIG_MESH_ROUTE_TABLE_SIZE * 6, &route_table_size);
if (send_count && !(send_count % 100)) {
ESP_LOGI(MESH_TAG, "size:%d/%d,send_count:%d", route_table_size,
esp_mesh_get_routing_table_size(), send_count);
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}
send_count++;
tx_buf[25] = (send_count >> 24) & 0xff;
tx_buf[24] = (send_count >> 16) & 0xff;
tx_buf[23] = (send_count >> 8) & 0xff;
tx_buf[22] = (send_count >> 0) & 0xff;
if (send_count % 2) {
memcpy(tx_buf, (uint8_t *)&light_on, sizeof(light_on));
} else {
memcpy(tx_buf, (uint8_t *)&light_off, sizeof(light_off));
}
for (i = 0; i < route_table_size; i++) {
err = esp_mesh_send(&route_table[i], &data, MESH_DATA_P2P, NULL, 0);
if (err) {
ESP_LOGE(MESH_TAG,
"[ROOT-2-UNICAST:%d][L:%d]parent:"MACSTR" to "MACSTR", heap:%d[err:0x%x, proto:%d, tos:%d]",
send_count, mesh_layer, MAC2STR(mesh_parent_addr.addr),
MAC2STR(route_table[i].addr), esp_get_free_heap_size(),
err, data.proto, data.tos);
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} else if (!(send_count % 100)) {
ESP_LOGW(MESH_TAG,
"[ROOT-2-UNICAST:%d][L:%d][rtableSize:%d]parent:"MACSTR" to "MACSTR", heap:%d[err:0x%x, proto:%d, tos:%d]",
send_count, mesh_layer,
esp_mesh_get_routing_table_size(),
MAC2STR(mesh_parent_addr.addr),
MAC2STR(route_table[i].addr), esp_get_free_heap_size(),
err, data.proto, data.tos);
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}
}
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/* if route_table_size is less than 10, add delay to avoid watchdog in this task. */
if (route_table_size < 10) {
vTaskDelay(1 * 1000 / portTICK_RATE_MS);
}
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}
vTaskDelete(NULL);
}
void esp_mesh_p2p_rx_main(void *arg)
{
int recv_count = 0;
esp_err_t err;
mesh_addr_t from;
int send_count = 0;
mesh_data_t data;
int flag = 0;
data.data = rx_buf;
data.size = RX_SIZE;
is_running = true;
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while (is_running) {
data.size = RX_SIZE;
err = esp_mesh_recv(&from, &data, portMAX_DELAY, &flag, NULL, 0);
if (err != ESP_OK || !data.size) {
ESP_LOGE(MESH_TAG, "err:0x%x, size:%d", err, data.size);
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continue;
}
/* extract send count */
if (data.size >= sizeof(send_count)) {
send_count = (data.data[25] << 24) | (data.data[24] << 16)
| (data.data[23] << 8) | data.data[22];
}
recv_count++;
/* process light control */
mesh_light_process(&from, data.data, data.size);
if (!(recv_count % 1)) {
ESP_LOGW(MESH_TAG,
"[#RX:%d/%d][L:%d] parent:"MACSTR", receive from "MACSTR", size:%d, heap:%d, flag:%d[err:0x%x, proto:%d, tos:%d]",
recv_count, send_count, mesh_layer,
MAC2STR(mesh_parent_addr.addr), MAC2STR(from.addr),
data.size, esp_get_free_heap_size(), flag, err, data.proto,
data.tos);
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}
}
vTaskDelete(NULL);
}
esp_err_t esp_mesh_comm_p2p_start(void)
{
static bool is_comm_p2p_started = false;
if (!is_comm_p2p_started) {
is_comm_p2p_started = true;
xTaskCreate(esp_mesh_p2p_tx_main, "MPTX", 3072, NULL, 5, NULL);
xTaskCreate(esp_mesh_p2p_rx_main, "MPRX", 3072, NULL, 5, NULL);
}
return ESP_OK;
}
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void mesh_event_handler(void *arg, esp_event_base_t event_base,
int32_t event_id, void *event_data)
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{
mesh_addr_t id = {0,};
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static uint8_t last_layer = 0;
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switch (event_id) {
case MESH_EVENT_STARTED: {
esp_mesh_get_id(&id);
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ESP_LOGI(MESH_TAG, "<MESH_EVENT_MESH_STARTED>ID:"MACSTR"", MAC2STR(id.addr));
is_mesh_connected = false;
mesh_layer = esp_mesh_get_layer();
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}
break;
case MESH_EVENT_STOPPED: {
ESP_LOGI(MESH_TAG, "<MESH_EVENT_STOPPED>");
is_mesh_connected = false;
mesh_layer = esp_mesh_get_layer();
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}
break;
case MESH_EVENT_CHILD_CONNECTED: {
mesh_event_child_connected_t *child_connected = (mesh_event_child_connected_t *)event_data;
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ESP_LOGI(MESH_TAG, "<MESH_EVENT_CHILD_CONNECTED>aid:%d, "MACSTR"",
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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;
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ESP_LOGI(MESH_TAG, "<MESH_EVENT_CHILD_DISCONNECTED>aid:%d, "MACSTR"",
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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;
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ESP_LOGW(MESH_TAG, "<MESH_EVENT_ROUTING_TABLE_ADD>add %d, new:%d",
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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;
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ESP_LOGW(MESH_TAG, "<MESH_EVENT_ROUTING_TABLE_REMOVE>remove %d, new:%d",
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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",
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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);
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mesh_layer = connected->self_layer;
memcpy(&mesh_parent_addr.addr, connected->connected.bssid, 6);
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ESP_LOGI(MESH_TAG,
"<MESH_EVENT_PARENT_CONNECTED>layer:%d-->%d, parent:"MACSTR"%s, ID:"MACSTR"",
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last_layer, mesh_layer, MAC2STR(mesh_parent_addr.addr),
esp_mesh_is_root() ? "<ROOT>" :
(mesh_layer == 2) ? "<layer2>" : "", MAC2STR(id.addr));
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last_layer = mesh_layer;
mesh_connected_indicator(mesh_layer);
is_mesh_connected = true;
if (esp_mesh_is_root()) {
esp_netif_dhcpc_start(netif_sta);
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}
esp_mesh_comm_p2p_start();
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}
break;
case MESH_EVENT_PARENT_DISCONNECTED: {
mesh_event_disconnected_t *disconnected = (mesh_event_disconnected_t *)event_data;
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ESP_LOGI(MESH_TAG,
"<MESH_EVENT_PARENT_DISCONNECTED>reason:%d",
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disconnected->reason);
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is_mesh_connected = false;
mesh_disconnected_indicator();
mesh_layer = esp_mesh_get_layer();
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}
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;
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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>" : "");
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last_layer = mesh_layer;
mesh_connected_indicator(mesh_layer);
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}
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"",
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MAC2STR(root_addr->addr));
}
break;
case MESH_EVENT_VOTE_STARTED: {
mesh_event_vote_started_t *vote_started = (mesh_event_vote_started_t *)event_data;
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ESP_LOGI(MESH_TAG,
"<MESH_EVENT_VOTE_STARTED>attempts:%d, reason:%d, rc_addr:"MACSTR"",
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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>");
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break;
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}
case MESH_EVENT_ROOT_SWITCH_REQ: {
mesh_event_root_switch_req_t *switch_req = (mesh_event_root_switch_req_t *)event_data;
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ESP_LOGI(MESH_TAG,
"<MESH_EVENT_ROOT_SWITCH_REQ>reason:%d, rc_addr:"MACSTR"",
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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));
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}
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;
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ESP_LOGI(MESH_TAG, "<MESH_EVENT_ROOT_FIXED>%s",
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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",
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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",
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scan_done->number);
}
break;
case MESH_EVENT_NETWORK_STATE: {
mesh_event_network_state_t *network_state = (mesh_event_network_state_t *)event_data;
mesh: add channel switch function 1. add network channel switch function. - users can obtain the new channel through the event MESH_EVENT_CHANNEL_SWITCH. - the entire network will be moved to the same channel as the router without user intervention. - if no router is in the network, users can call esp_mesh_switch_channel() on the root side to move the entire network to their desired channel. 2. support not configuring the network channel. 3. support not configuring the router BSSID even if the router is hidden. 4. add allow_channel_switch to mesh configuration. - if the channel is not specified, this value will be ignored. - if the channel is specified and this value is set, when "fail" (mesh_attempts_t) times of parent selection or look for networks are reached, device will change to perform a full channel scan for networks that could join. - if the channel is specified and this value is set to 0, when a root is not elected, channel switch is not allowed. but when a root appears, the root performs a full channel scan during the process of connecting to the router, so even allow_channel_switch is set to 0, the root may still switch channel and eventually the entire network changes channel. 5. add allow_router_switch to mesh router configuration. - if the BSSID of router is not specified, this value will be ignored. - if the BSSID of router is specified and this value is set, when the router of this specified BSSID fails to be found after "fail" (mesh_attempts_t) times, the entire network is allowed to switch to another router with the same SSID. 6. modify the root to perform a full channel scan when esp_wifi_connect(). 7. support handling beacon without DS Paramter Set.
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ESP_LOGI(MESH_TAG, "<MESH_EVENT_NETWORK_STATE>is_rootless:%d",
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network_state->is_rootless);
}
break;
case MESH_EVENT_STOP_RECONNECTION: {
mesh: add channel switch function 1. add network channel switch function. - users can obtain the new channel through the event MESH_EVENT_CHANNEL_SWITCH. - the entire network will be moved to the same channel as the router without user intervention. - if no router is in the network, users can call esp_mesh_switch_channel() on the root side to move the entire network to their desired channel. 2. support not configuring the network channel. 3. support not configuring the router BSSID even if the router is hidden. 4. add allow_channel_switch to mesh configuration. - if the channel is not specified, this value will be ignored. - if the channel is specified and this value is set, when "fail" (mesh_attempts_t) times of parent selection or look for networks are reached, device will change to perform a full channel scan for networks that could join. - if the channel is specified and this value is set to 0, when a root is not elected, channel switch is not allowed. but when a root appears, the root performs a full channel scan during the process of connecting to the router, so even allow_channel_switch is set to 0, the root may still switch channel and eventually the entire network changes channel. 5. add allow_router_switch to mesh router configuration. - if the BSSID of router is not specified, this value will be ignored. - if the BSSID of router is specified and this value is set, when the router of this specified BSSID fails to be found after "fail" (mesh_attempts_t) times, the entire network is allowed to switch to another router with the same SSID. 6. modify the root to perform a full channel scan when esp_wifi_connect(). 7. support handling beacon without DS Paramter Set.
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ESP_LOGI(MESH_TAG, "<MESH_EVENT_STOP_RECONNECTION>");
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}
break;
case MESH_EVENT_FIND_NETWORK: {
mesh_event_find_network_t *find_network = (mesh_event_find_network_t *)event_data;
mesh: add channel switch function 1. add network channel switch function. - users can obtain the new channel through the event MESH_EVENT_CHANNEL_SWITCH. - the entire network will be moved to the same channel as the router without user intervention. - if no router is in the network, users can call esp_mesh_switch_channel() on the root side to move the entire network to their desired channel. 2. support not configuring the network channel. 3. support not configuring the router BSSID even if the router is hidden. 4. add allow_channel_switch to mesh configuration. - if the channel is not specified, this value will be ignored. - if the channel is specified and this value is set, when "fail" (mesh_attempts_t) times of parent selection or look for networks are reached, device will change to perform a full channel scan for networks that could join. - if the channel is specified and this value is set to 0, when a root is not elected, channel switch is not allowed. but when a root appears, the root performs a full channel scan during the process of connecting to the router, so even allow_channel_switch is set to 0, the root may still switch channel and eventually the entire network changes channel. 5. add allow_router_switch to mesh router configuration. - if the BSSID of router is not specified, this value will be ignored. - if the BSSID of router is specified and this value is set, when the router of this specified BSSID fails to be found after "fail" (mesh_attempts_t) times, the entire network is allowed to switch to another router with the same SSID. 6. modify the root to perform a full channel scan when esp_wifi_connect(). 7. support handling beacon without DS Paramter Set.
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ESP_LOGI(MESH_TAG, "<MESH_EVENT_FIND_NETWORK>new channel:%d, router BSSID:"MACSTR"",
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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;
mesh: add channel switch function 1. add network channel switch function. - users can obtain the new channel through the event MESH_EVENT_CHANNEL_SWITCH. - the entire network will be moved to the same channel as the router without user intervention. - if no router is in the network, users can call esp_mesh_switch_channel() on the root side to move the entire network to their desired channel. 2. support not configuring the network channel. 3. support not configuring the router BSSID even if the router is hidden. 4. add allow_channel_switch to mesh configuration. - if the channel is not specified, this value will be ignored. - if the channel is specified and this value is set, when "fail" (mesh_attempts_t) times of parent selection or look for networks are reached, device will change to perform a full channel scan for networks that could join. - if the channel is specified and this value is set to 0, when a root is not elected, channel switch is not allowed. but when a root appears, the root performs a full channel scan during the process of connecting to the router, so even allow_channel_switch is set to 0, the root may still switch channel and eventually the entire network changes channel. 5. add allow_router_switch to mesh router configuration. - if the BSSID of router is not specified, this value will be ignored. - if the BSSID of router is specified and this value is set, when the router of this specified BSSID fails to be found after "fail" (mesh_attempts_t) times, the entire network is allowed to switch to another router with the same SSID. 6. modify the root to perform a full channel scan when esp_wifi_connect(). 7. support handling beacon without DS Paramter Set.
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ESP_LOGI(MESH_TAG, "<MESH_EVENT_ROUTER_SWITCH>new router:%s, channel:%d, "MACSTR"",
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router_switch->ssid, router_switch->channel, MAC2STR(router_switch->bssid));
}
break;
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default:
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ESP_LOGI(MESH_TAG, "unknown id:%d", event_id);
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break;
}
}
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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));
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}
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void app_main(void)
{
ESP_ERROR_CHECK(mesh_light_init());
ESP_ERROR_CHECK(nvs_flash_init());
/* tcpip initialization */
esp_netif_init();
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/* 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(esp_netif_create_default_wifi_mesh_netifs(&netif_sta, NULL));
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/* wifi initialization */
wifi_init_config_t config = WIFI_INIT_CONFIG_DEFAULT();
ESP_ERROR_CHECK(esp_wifi_init(&config));
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ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &ip_event_handler, NULL));
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ESP_ERROR_CHECK(esp_wifi_set_storage(WIFI_STORAGE_FLASH));
ESP_ERROR_CHECK(esp_wifi_start());
/* mesh initialization */
ESP_ERROR_CHECK(esp_mesh_init());
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ESP_ERROR_CHECK(esp_event_handler_register(MESH_EVENT, ESP_EVENT_ANY_ID, &mesh_event_handler, NULL));
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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));
mesh_cfg_t cfg = MESH_INIT_CONFIG_DEFAULT();
/* 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));
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cfg.mesh_ap.max_connection = CONFIG_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());
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ESP_LOGI(MESH_TAG, "mesh starts successfully, heap:%d, %s\n", esp_get_free_heap_size(),
esp_mesh_is_root_fixed() ? "root fixed" : "root not fixed");
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}