funktioniert.

lwipopts.h

@@ -1,6 +1,8 @@
 #ifndef _LWIPOPTS_H
 #define _LWIPOPTS_H
 
+#include <stdint.h>
+
 #define HTTPD_FSDATA_FILE "src/fsdata.c"
 
 #define NO_SYS 1
@@ -31,6 +33,20 @@
 #define PBUF_POOL_SIZE 24
 #define MEMP_NUM_SYS_TIMEOUT 20
 
+#define MQTT_OUTPUT_RINGBUF_SIZE 2048
+
+#define SNTP_SERVER_DNS 1
+#define SNTP_SERVER_ADDRESS "de.pool.ntp.org"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+void sntp_set_system_time_us(uint32_t sec, uint32_t us);
+#ifdef __cplusplus
+}
+#endif
+#define SNTP_SET_SYSTEM_TIME_US(sec, us) sntp_set_system_time_us((sec), (us))
+
 #define TCP_MSS 1460
 #define TCP_WND (8 * TCP_MSS)
 #define TCP_SND_BUF (8 * TCP_MSS)