diff --git a/src/hal/generic.h b/src/hal/generic.h
index 14c83ff5..fa1d14c7 100644
--- a/src/hal/generic.h
+++ b/src/hal/generic.h
@@ -10,10 +10,6 @@
 // Hardware related definitions for generic ESP32 boards
 // generic.h is kitchensink with all available options
 
-// SDS011 dust sensor settings
-#define HAS_SDS011 1 // use SDS011
-#define SDS011_SERIAL 9600, SERIAL_8N1, GPIO_NUM_19, GPIO_NUM_23 // SDS011 RX, TX
-
 #define HAS_LORA 1 // comment out if device shall not send data via LoRa or has no LoRa
 #define HAS_SPI 1  // comment out if device shall not send data via SPI
 // pin definitions for SPI slave interface
@@ -104,4 +100,4 @@
 #define MCP_24AA02E64_I2C_ADDRESS 0x50 // I2C address for the 24AA02E64 
 #define MCP_24AA02E64_MAC_ADDRESS 0xF8 // Memory adress of unique deveui 64 bits
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/hal/ttgov21new.h b/src/hal/ttgov21new.h
index 90f93c7a..9fa665f2 100644
--- a/src/hal/ttgov21new.h
+++ b/src/hal/ttgov21new.h
@@ -12,6 +12,12 @@
 // This settings are for boards labeled v1.6 on pcb, NOT for v1.5 or older
 */
 
+// SDS011 dust sensor settings
+#define HAS_SDS011 1 // use SDS011
+// used pins on the ESP-side:
+#define ESP_PIN_TX 19     // connect to RX on the SDS011
+#define ESP_PIN_RX 23     // connect to TX on the SDS011
+
 #define HAS_LORA 1       // comment out if device shall not send data via LoRa
 #define CFG_sx1276_radio 1 // HPD13A LoRa SoC
 
@@ -48,4 +54,4 @@
 #define LORA_IO1  (33)
 #define LORA_IO2  (32)
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/sdcard.cpp b/src/sdcard.cpp
index 780efef9..002cfdf8 100644
--- a/src/sdcard.cpp
+++ b/src/sdcard.cpp
@@ -24,6 +24,8 @@ bool sdcard_init() {
   useSDCard = SD.begin(SDCARD_CS, SDCARD_MOSI, SDCARD_MISO, SDCARD_SCLK);
   if (useSDCard)
     createFile();
+  else
+      ESP_LOGD(TAG,"SD-card not found");
   return useSDCard;
 }
 
@@ -84,4 +86,3 @@ void createFile(void) {
 }
 
 #endif // (HAS_SDCARD)
-
diff --git a/src/sds011read.cpp b/src/sds011read.cpp
index 71be06d9..f5a781d5 100644
--- a/src/sds011read.cpp
+++ b/src/sds011read.cpp
@@ -3,19 +3,12 @@
 // Local logging tag
 static const char TAG[] = __FILE__;
 
-#if (HAS_SDS)
-
 #include "sds011read.h"
 
-// UART(2) is unused in this project
 #if (HAS_IF482)
 #error cannot use IF482 together with SDS011 (both use UART#2)
 #endif
-
-#ifndef SDS011_SERIAL
-#error serial settings for SDS011 connection missing
-#endif
-
+// UART(2) is unused in this project
 static HardwareSerial sdsSerial(2); // so we use it here
 static SDS011 sdsSensor;            // fine dust sensor
 
@@ -27,12 +20,13 @@ boolean isSDS011Active;
 // init
 bool sds011_init() {
   pm25 = pm10 = 0.0;
-  sdsSerial.begin(SDS011_SERIAL);
-  sdsSensor.begin(&sdsSerial);
-  //sdsSensor.contmode(0); // for safety: no wakeup/sleep by the sensor
-  sds011_sleep();        // we do it by ourselves
+#if (HAS_SDS011)  
+  sdsSensor.begin (&sdsSerial,  ESP_PIN_RX, ESP_PIN_TX);
+#endif  
+  sds011_sleep();        // we do sleep/wakup by ourselves
   return true;
 }
+
 // reading data:
 void sds011_loop() {
   if (isSDS011Active) {