diff --git a/code/platformio.ini b/code/platformio.ini
index d3c13ed1..754973a7 100644
--- a/code/platformio.ini
+++ b/code/platformio.ini
@@ -37,6 +37,19 @@ extra_scripts = extra_scripts.py
 
 # ------------------------------------------------------------------------------
 
+[env:espurna-core]
+platform = ${common.platform}
+framework = arduino
+board = esp01_1m
+board_flash_mode = dout
+lib_deps = ${common.lib_deps}
+lib_ignore = ${common.lib_ignore}
+build_flags = ${common.build_flags_1m} -DITEAD_SONOFF_BASIC -DESPURNA_CORE
+monitor_baud = 115200
+extra_scripts = ${common.extra_scripts}
+
+# ------------------------------------------------------------------------------
+
 [env:wemos-d1mini-relayshield]
 platform = ${common.platform}
 framework = arduino