Ob das jetzt alles so schön ist, lassen wir mal dahin gestellt, aber so sollte es sich zumindest kompilieren lassen:
main.cpp
#include <Arduino.h>
#include <iostream>
#include <WiFiClient.h>
#include <WiFiServer.h>
#include <WIFI.h>
#include <stdio.h>
#include <stdlib.h>
#include <String.h>
using namespace std;
#include <float.h>
#include <math.h>
#include <stdio.h>
#include "time.h"
#include <TFT_eSPI.h> // Hardware-specific library
// eigene units einbinden
#include "MySd.hpp"
#include <SPI.h>
#include "FS.h"
#include "SD.h"
const char* ssid = "************";
const char* pass = "************";
String rec_str = ""; // Für Serielle
int port = 23; // Port number
WiFiServer server(port);
int status = WL_IDLE_STATUS;
#define TFT_GREY 0x5AEB
TFT_eSPI tft = TFT_eSPI(); // Invoke custom library
// My Time and Date
#define MY_NTP_SERVER "at.pool.ntp.org"
#define MY_TZ "CET-1CEST,M3.5.0/02,M10.5.0/03"
/* Globals */
time_t now; // this are the seconds since Epoch (1970) - UTC
tm tm; // the structure tm holds time information in a more convenient way *
char ntpDate[50]; // Datum
char ntpTime[50]; // Uhrzeit
//==============================================================
String empf_str; // Für WLAN Empfang
//==============================================================
void showTime() {
time(&now); // read the current time
localtime_r(&now, &tm); // update the structure tm with the current time
snprintf(ntpDate, 50, "%02d.%02d.%04d", tm.tm_mday, tm.tm_mon + 1, tm.tm_year + 1900);
snprintf(ntpTime, 50, "%02d:%02d:%02d", tm.tm_hour, tm.tm_min, tm.tm_sec + 1);
}
//==============================================================
// SETUP
//==============================================================
void setup() {
Serial.begin(115200);
configTime(0, 0, MY_NTP_SERVER); // 0, 0 because we will use TZ in the next line
setenv("TZ", MY_TZ, 1); // Set environment variable with your time zone
tzset();
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, pass); // WiFi.begin(ssid, pass);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
server.begin();
tft.init();
tft.setRotation(2);
tft.fillScreen(TFT_BLACK);
tft.setTextColor(TFT_WHITE, TFT_BLACK); // Adding a background colour erases previous text automatically
}
//==============================================================
// LOOP
//==============================================================
void loop() {
showTime();
tft.drawCentreString(ntpTime, 120, 10, 4);
tft.drawCentreString(ntpDate, 120, 35, 4);
delay(100); // dirty delay
//=========================
client = server.available();
//=========================
while (client.connected()) {
showTime();
tft.drawCentreString(ntpTime, 120, 10, 4);
tft.drawCentreString(ntpDate, 120, 35, 4);
while (client.connected() && client.available()) {
empf_str.clear();
empf_str = client.readStringUntil('\n');
client.println(empf_str); // sende zurück zum prüfen
//=================================================================
if (empf_str[0] == 'A') { client.println(ntpDate); }
//=================================================================
if (empf_str[0] == 'B') { client.println(ntpTime); }
//=================================================================
if (empf_str[0] == 'C') { check_sd_card(); }
//=================================================================
if (empf_str[0] == 'D') { listDir(SD, "/", 0); }
}
}
}
Die Definition von "client" erfolgte in der main.cpp zu spät, weil Du das Objekt schon in der MySd.cpp verwendest. Darum wurde diese aus main.cpp entfernt.
MySd.hpp
#pragma once
#include <SPI.h>
#include "FS.h"
#include "SD.h"
#include <WIFI.h>
#include <iostream>
#include <WiFiClient.h>
#include <WiFiServer.h>
#include <stdio.h>
#include <stdlib.h>
#include <String.h>
#include <errno.h>
using namespace std;
#include <float.h>
#include <math.h>
#include <stdio.h>
void check_sd_card();
void listDir(fs::FS &fs, const char * dirname, uint8_t levels);
extern WiFiClient client; // << Bekannt machen, dass dieses Objekt irgendwo im Code mal vorkommen wird.
MySd.cpp
#include <Arduino.h>
#include <WiFi.h>
#include "MySd.hpp"
WiFiClient client; // << client Objekt definieren, weil es "weiter unten" benötigt wird.
// Hier kann ich nichts über client senden, nur über Serial.print
//===================================================
void check_sd_card()
{
{
if(!SD.begin(5)){
client.println("Card Mount Failed"); // <=== Error
return;
}
uint8_t cardType = SD.cardType();
if(cardType == CARD_NONE){
Serial.println("No SD card attached");
return;
}
Serial.print("SD Card Type: ");
if(cardType == CARD_MMC){
Serial.println("MMC");
} else if(cardType == CARD_SD){
Serial.println("SDSC");
} else if(cardType == CARD_SDHC){
Serial.println("SDHC");
} else {
Serial.println("UNKNOWN");
}
uint64_t cardSize = SD.cardSize() / (1024 * 1024);
Serial.printf("SD Card Size: %lluMB\n", cardSize);
}
}
void listDir(fs::FS &fs, const char * dirname, uint8_t levels){
Serial.printf("Listing directory: %s\n", dirname);
File root = fs.open(dirname);
if(!root){
Serial.println("Failed to open directory");
return;
}
if(!root.isDirectory()){
Serial.println("Not a directory");
return;
}
File file = root.openNextFile();
while(file){
if(file.isDirectory()){
Serial.print(" DIR : ");
Serial.println(file.name());
if(levels){
listDir(fs, file.name(), levels -1);
}
} else {
Serial.print(" FILE: ");
Serial.print(file.name());
Serial.print(" SIZE: ");
Serial.println(file.size());
}
file = root.openNextFile();
}
}
