作者lavender19 (lavender)
看板Programming
標題[請益] NodeMCU ESP8266與EMQX Docker連線
時間Sun Mar 10 14:38:31 2024
各位先進們大家好～
NodeMCU ESP8266 透過Http協定，連線到本機Docker 上面的EMQX，確認Http溝通是否正
常，目前wifi可以正常連線，但HTPP連線失敗？
皆在本機執行，請問那種情況下可能會造成這些錯誤？
https://imgur.com/a/MoFdCC6
以下為程式碼
======================================
#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
const char* ssid = "xxx";
const char* password = "xxx";
WiFiClient wifiClient; // Create a WiFiClient object
HTTPClient http; // Declare the HTTPClient object here
// Replace with your EMQX server URL (without the trailing slash)
//const char* emqx_server = "
http://xxx.xxx.xxx.xxx"; //priviate ip
const char* emqx_server = "
http://xxx.xxx.xxx.xxx"; //public ip?
void setup() {
Serial.begin(115200);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(1000);
Serial.println("Connecting to WiFi...");
}
Serial.println("Connected to WiFi");
// Your other setup code here...
}
void loop() {
// Check if WiFi is still connected
if (WiFi.status() != WL_CONNECTED) {
Serial.println("WiFi connection lost. Reconnecting...");
WiFi.reconnect();
}
// Check if HTTP connection is still active
if (!wifiClient.connected()) {
Serial.println("HTTP connection lost. Reconnecting...");
http.begin(wifiClient, "
http://172.17.0.2:18083"); // Use any valid UR
L for testing
int httpCode = http.GET();
if (httpCode == 200) {
Serial.println("HTTP connection re-established.");
} else {
Serial.println("Error reconnecting to HTTP server.");
}
http.end(); // Close the connection
}
// Your other loop code here...
delay(1000); // Adjust the delay as needed
}
因上述問題已苦惱多天
在此請教各位前輩～
非常感謝！！
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1F：推 ssdoz2sk: 你手機連同一個wifi 連的到？如果不行， 39.9.138.8 03/12 08:56
2F：→ ssdoz2sk: 檢查一下防火牆，跟 port forwarding 設 39.9.138.8 03/12 08:56
3F：→ ssdoz2sk: 定 39.9.138.8 03/12 08:56
4F：→ shadowjohn: if (!wifiClient.connected()) 這行怪 111.246.106.78 04/07 23:57
5F：→ shadowjohn: 為什麼wifi連線失敗才要連http ? 111.246.106.78 04/07 23:57