move mqttloop from core0 to core1

src/main.cpp

@@ -29,11 +29,11 @@ Task          Core  Prio  Purpose
 -------------------------------------------------------------------------------
 ledloop       0     3     blinks LEDs
 spiloop       0     2     reads/writes data on spi interface
-mqttloop      0     2     reads/writes data on ETH interface
 IDLE          0     0     ESP32 arduino scheduler -> runs wifi sniffer
 
 lmictask      1     2     MCCI LMiC LORAWAN stack
 clockloop     1     4     generates realtime telegrams for external clock
+mqttloop      1     2     reads/writes data on ETH interface
 timesync_proc 1     3     processes realtime time sync requests
 irqhandler    1     2     cyclic tasks (i.e. displayrefresh) triggered by timers
 gpsloop       1     1     reads data from GPS via serial or i2c

src/mqttclient.cpp

@@ -37,7 +37,7 @@ esp_err_t mqtt_init(void) {
            SEND_QUEUE_SIZE * PAYLOAD_BUFFER_SIZE);
 
   ESP_LOGI(TAG, "Starting MQTTloop...");
-  xTaskCreate(mqtt_client_task, "mqttloop", 4096, (void *)NULL, 1, &mqttTask);
+  xTaskCreatePinnedToCore(mqtt_client_task, "mqttloop", 4096, (void *)NULL, 1, &mqttTask, 1);
 
   return ESP_OK;
 }