我的esp8266項目出現問題。我的目的是使用esp8266每秒傳輸信標幀,以便我的android設備或筆記本電腦可以接收它並顯示在我可以連接的AP列表中。 這裏是我的代碼,我寫道:ESP8266:發送具有深度睡眠模式的信標幀不能正常工作
#include <ESP8266WiFi.h>
extern "C" {
#include "user_interface.h"
}
void setup() {
delay(500);
sendBeacon("ESP8266");
ESP.deepSleep(10e5);
}
void loop() {
}
void sendBeacon(char* ssid) {
// Randomize channel //
byte channel = 1;
wifi_set_channel(channel);
uint8_t packet[128] = { 0x80, 0x00, //Frame Control
0x00, 0x00, //Duration
/*4*/ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, //Destination address
/*10*/ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, //Source address - overwritten later
/*16*/ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, //BSSID - overwritten to the same as the source address
/*22*/ 0xc0, 0x6c, //Seq-ctl
//Frame body starts here
/*24*/ 0x83, 0x51, 0xf7, 0x8f, 0x0f, 0x00, 0x00, 0x00, //timestamp - the number of microseconds the AP has been active
/*32*/ 0xFF, 0x00, //Beacon interval
/*34*/ 0x01, 0x04, //Capability info
/* SSID */
/*36*/ 0x00
};
int ssidLen = strlen(ssid);
packet[37] = ssidLen;
for(int i = 0; i < ssidLen; i++) {
packet[38+i] = ssid[i];
}
uint8_t postSSID[13] = {0x01, 0x08, 0x82, 0x84, 0x8b, 0x96, 0x24, 0x30, 0x48, 0x6c, //supported rate
0x03, 0x01, 0x04 /*DSSS (Current Channel)*/ };
for(int i = 0; i < 12; i++) {
packet[38 + ssidLen + i] = postSSID[i];
}
packet[50 + ssidLen] = channel;
// get SRC MAC
unsigned char mac[6];
WiFi.macAddress(mac);
packet[10] = packet[16] = mac[0];
packet[11] = packet[17] = mac[1];
packet[12] = packet[18] = mac[2];
packet[13] = packet[19] = mac[3];
packet[14] = packet[20] = mac[4];
packet[15] = packet[21] = mac[5];
int packetSize = 51 + ssidLen;
wifi_send_pkt_freedom(packet, packetSize, 0);
delay(1);
}
我使用tcpdump的捕捉那些框架,是的,他們在那裏。但我仍然無法看到我的筆記本電腦和我的Android設備上的AP列表中。 我可以看到它,如果我停止使用深度睡眠模式。例如:
#include <ESP8266WiFi.h>
extern "C" {
#include "user_interface.h"
}
void setup() {
delay(500);
// sendBeacon("ESP8266");
// ESP.deepSleep(10e5);
}
void loop() {
sendBeacon("ESP8266");
}
void sendBeacon(char* ssid) {
// Randomize channel //
byte channel = 1;
wifi_set_channel(channel);
uint8_t packet[128] = { 0x80, 0x00, //Frame Control
0x00, 0x00, //Duration
/*4*/ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, //Destination address
/*10*/ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, //Source address - overwritten later
/*16*/ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, //BSSID - overwritten to the same as the source address
/*22*/ 0xc0, 0x6c, //Seq-ctl
//Frame body starts here
/*24*/ 0x83, 0x51, 0xf7, 0x8f, 0x0f, 0x00, 0x00, 0x00, //timestamp - the number of microseconds the AP has been active
/*32*/ 0xFF, 0x00, //Beacon interval
/*34*/ 0x01, 0x04, //Capability info
/* SSID */
/*36*/ 0x00
};
int ssidLen = strlen(ssid);
packet[37] = ssidLen;
for(int i = 0; i < ssidLen; i++) {
packet[38+i] = ssid[i];
}
uint8_t postSSID[13] = {0x01, 0x08, 0x82, 0x84, 0x8b, 0x96, 0x24, 0x30, 0x48, 0x6c, //supported rate
0x03, 0x01, 0x04 /*DSSS (Current Channel)*/ };
for(int i = 0; i < 12; i++) {
packet[38 + ssidLen + i] = postSSID[i];
}
packet[50 + ssidLen] = channel;
// get SRC MAC
unsigned char mac[6];
WiFi.macAddress(mac);
packet[10] = packet[16] = mac[0];
packet[11] = packet[17] = mac[1];
packet[12] = packet[18] = mac[2];
packet[13] = packet[19] = mac[3];
packet[14] = packet[20] = mac[4];
packet[15] = packet[21] = mac[5];
int packetSize = 51 + ssidLen;
wifi_send_pkt_freedom(packet, packetSize, 0);
delay(1);
}
有誰知道爲什麼?請幫我拿到這個,謝謝!