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| #include <ESP8266WiFi.h> | |
| #include <WiFiUdp.h> | |
| #define _IS_MY_HOME | |
| // wifi | |
| #ifdef _IS_MY_HOME | |
| #include "/usr/local/src/ap_setting.h" | |
| #else | |
| #include "ap_setting.h" | |
| #endif | |
| IPAddress syslogServer(192, 168, 10, 10); | |
| WiFiClient wifiClient; | |
| WiFiUDP udp; | |
| void wifi_connect() { | |
| WiFi.mode(WIFI_STA); | |
| WiFi.begin(ssid, password); | |
| int Attempt = 0; | |
| while (WiFi.status() != WL_CONNECTED) { | |
| delay(100); | |
| Attempt++; | |
| Serial.print("."); | |
| if (Attempt == 200) | |
| { | |
| ESP.restart(); | |
| } | |
| } | |
| Serial.println(""); | |
| Serial.println("WiFi connected"); | |
| Serial.println("IP address: "); | |
| Serial.println(WiFi.localIP()); | |
| } | |
| void setup() { | |
| Serial.begin(115200); | |
| delay(1000); | |
| wifi_connect(); | |
| delay(500); | |
| if (WiFi.status() == WL_CONNECTED) { | |
| sendUdpSyslog("esp8266-02-syslog started"); | |
| } | |
| String str1 = "AB"; | |
| String str2 = "CD"; | |
| for (int i = 1; i <= 700; i++) { | |
| str2 = str1 + str2 ; | |
| int msg_length = str2.length(); | |
| int all_length = String(msg_length).length(); | |
| str2 = String(msg_length + all_length) + str2 ; | |
| if ( msg_length > 400 && msg_length <= 1430 ) { | |
| Serial.print("----> "); | |
| Serial.println(str2.length()); | |
| sendUdpSyslog(str2); | |
| } | |
| if ( msg_length > 1431 ) { | |
| break; | |
| } | |
| delay(100); | |
| } | |
| } | |
| void loop() { | |
| } | |
| void sendUdpSyslog(String msgtosend) | |
| { | |
| unsigned int msg_length = msgtosend.length(); | |
| byte* p = (byte*)malloc(msg_length); | |
| memcpy(p, msgtosend.c_str(), msg_length); | |
| udp.beginPacket(syslogServer, 515); | |
| //udp.write(msgtosend.c_str(), msg_length); | |
| udp.write(p, msg_length); | |
| udp.endPacket(); | |
| Serial.print("----> "); | |
| Serial.println(String(msgtosend.c_str()).length()); | |
| free(p); | |
| } |
| https://github.com/esp8266/Arduino/blob/342c4ae6fb847bfc787f80b89a2bb888d942dc32/libraries/ESP8266WiFi/src/include/UdpContext.h#L308 | |
| private: | |
| void _reserve(size_t size) | |
| { | |
| const size_t pbuf_unit_size = 512; | |
| if (!_tx_buf_head) | |
| { | |
| _tx_buf_head = pbuf_alloc(PBUF_TRANSPORT, pbuf_unit_size, PBUF_RAM); | |
| _tx_buf_cur = _tx_buf_head; | |
| _tx_buf_offset = 0; | |
| } | |
| size_t cur_size = _tx_buf_head->tot_len; | |
| if (size < cur_size) | |
| return; | |
| size_t grow_size = size - cur_size; | |
| while(grow_size) | |
| { | |
| pbuf* pb = pbuf_alloc(PBUF_TRANSPORT, pbuf_unit_size, PBUF_RAM); | |
| pbuf_cat(_tx_buf_head, pb); | |
| if (grow_size < pbuf_unit_size) | |
| return; | |
| grow_size -= pbuf_unit_size; | |
| } | |
| } |
-changed to 1500
14:14:12.081947 IP 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1020
14:14:12.182026 IP 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1026
14:14:12.283688 IP 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1032
14:14:12.384505 IP 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1038
14:14:12.485692 IP 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1044
~changed to 512
15:58:26.916233 IP 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 472
15:58:27.016917 IP 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 482
15:58:27.117935 IP 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 492
15:58:27.218756 IP 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 502
15:58:27.320031 IP 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 512
15:58:27.420847 IP truncated-ip - 10 bytes missing! 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 522
15:58:27.522546 IP truncated-ip - 20 bytes missing! 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 532
15:58:27.623471 IP truncated-ip - 30 bytes missing! 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 542
15:58:27.721857 IP truncated-ip - 40 bytes missing! 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 552
15:58:27.824500 IP truncated-ip - 50 bytes missing! 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 562
hi @chaeplin , can we increase the UDP length much more than 1500, to be sure nothing lost , actually I should deliver about 7kb data from processing in my lap to the ESP module through out my wifi-router in time not exceeded than 40ms , do you have any suggestion what would be best and fast way to deliver this bug chunk of data
-changed to 1024
14:11:09.317019 IP 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1008
14:11:09.418847 IP 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1014
14:11:09.518973 IP 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1020
14:11:09.620085 IP truncated-ip - 2 bytes missing! 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1026
14:11:09.721469 IP truncated-ip - 8 bytes missing! 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1032
14:11:09.822548 IP truncated-ip - 14 bytes missing! 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1038
14:11:09.924998 IP truncated-ip - 20 bytes missing! 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1044
14:11:10.025179 IP truncated-ip - 26 bytes missing! 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1050
14:11:10.126405 IP truncated-ip - 32 bytes missing! 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1056
14:11:10.225801 IP truncated-ip - 38 bytes missing! 192.168.10.112.4097 > 192.168.10.10.515: UDP, length 1062