diff --git a/platformio.ini b/platformio.ini
index acf1f595..f9576620 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -11,13 +11,14 @@
 
 ; ---> SELECT TARGET PLATFORM HERE! <---
 [platformio]
+;env_default = test
 ;env_default = generic
 ;env_default = heltec
 ;env_default = ttgov1
 ;env_default = ttgov2
-;env_default = ttgov21
+env_default = ttgov21
 ;env_default = ttgobeam
-env_default = lopy
+;env_default = lopy
 ;env_default = lopy4
 ;env_default = fipy
 ;env_default = lolin32litelora
@@ -55,6 +56,18 @@ build_flags =
     -include "src/hal/${PIOENV}.h"
 ;    -w
  
+[env:test]
+platform = ${common_env_data.platform_espressif32}
+framework = arduino
+board = heltec_wifi_lora_32
+board_build.partitions = ${common_env_data.board_build.partitions}
+upload_speed = 115200
+monitor_speed = 115200
+lib_deps = 
+    ${common_env_data.lib_deps_all}
+build_flags = 
+    ${common_env_data.build_flags}
+
 [env:heltec]
 platform = ${common_env_data.platform_espressif32}
 framework = arduino
diff --git a/src/hal/test.h b/src/hal/test.h
new file mode 100644
index 00000000..5c9ea1aa
--- /dev/null
+++ b/src/hal/test.h
@@ -0,0 +1,20 @@
+// Hardware related definitions for ebox ESP32-bit with RFM95 LoRa
+
+#define HAS_LORA  1       // comment out if device shall not send data via LoRa
+#define HAS_SPI   1       // comment out if device shall not send data via SPI
+#define CFG_sx1276_radio 1
+
+#define HAS_LED GPIO_NUM_23 // blue LED on board
+#define HAS_BUTTON GPIO_NUM_0 // button "PROG" on board
+
+// re-define pin definitions of pins_arduino.h
+#define PIN_SPI_SS    GPIO_NUM_18 // ESP32 GPIO18 (Pin18) -- SX1276 NSS (Pin19) SPI Chip Select Input
+#define PIN_SPI_MOSI  GPIO_NUM_27 // ESP32 GPIO27 (Pin27) -- SX1276 MOSI (Pin18) SPI Data Input
+#define PIN_SPI_MISO  GPIO_NUM_19 // ESP32 GPIO19 (Pin19) -- SX1276 MISO (Pin17) SPI Data Output
+#define PIN_SPI_SCK   GPIO_NUM_5  // ESP32 GPIO5 (Pin5)   -- SX1276 SCK (Pin16) SPI Clock Input
+
+// non arduino pin definitions
+#define RST   GPIO_NUM_14 // ESP32 GPIO14 (Pin14) -- SX1276 NRESET (Pin7) Reset Trigger Input
+#define DIO0  GPIO_NUM_26 // ESP32 GPIO26 (Pin15) -- SX1276 DIO0 (Pin8) used by LMIC for detecting LoRa RX_Done & TX_Done
+#define DIO1  GPIO_NUM_33 // ESP32 GPIO33 (Pin13) -- SX1276 DIO1 (Pin9) used by LMIC for detecting LoRa RX_Timeout
+#define DIO2  LMIC_UNUSED_PIN // 32 ESP32 GPIO32 (Pin12) -- SX1276 DIO2 (Pin10) not used by LMIC for LoRa (Timeout for FSK only)
\ No newline at end of file