diff --git a/include/sds011read.h b/include/sds011read.h
index d278a5fd..8c573c0d 100644
--- a/include/sds011read.h
+++ b/include/sds011read.h
@@ -3,10 +3,6 @@
 
 #include <SDS011.h>
 
-// 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 SDCARD_FILE_HEADER_SDS011     ", PM10,PM25"
 
 bool sds011_init();