diff --git a/code/espurna/board.ino b/code/espurna/board.ino
index 1b8e0203..553a760c 100644
--- a/code/espurna/board.ino
+++ b/code/espurna/board.ino
@@ -646,6 +646,8 @@ int getBoardId() {
         return 154;
     #elif defined(LINKSPRITE_LINKNODE_R4)
         return 155;
+    #elif defined(GENERIC_ESP01_512KB)
+        return 156;
     #else
         return -1; // CUSTOM
     #endif
diff --git a/code/espurna/config/arduino.h b/code/espurna/config/arduino.h
index 422f8700..2c0e5900 100644
--- a/code/espurna/config/arduino.h
+++ b/code/espurna/config/arduino.h
@@ -56,6 +56,7 @@
 //#define GENERIC_ESP01S_DS18B20_V10
 //#define GENERIC_ESP01S_RELAY_V40
 //#define GENERIC_ESP01S_RGBLED_V10
+//#define GENERIC_ESP01_512KB
 //#define GENERIC_GU10
 //#define GENERIC_V9261F
 //#define GIZWITS_WITTY_CLOUD
diff --git a/code/espurna/config/hardware.h b/code/espurna/config/hardware.h
index 11e25695..948f478c 100644
--- a/code/espurna/config/hardware.h
+++ b/code/espurna/config/hardware.h
@@ -4512,6 +4512,22 @@
     #define RELAY3_TYPE             RELAY_TYPE_NORMAL
     #define RELAY4_TYPE             RELAY_TYPE_NORMAL
 
+// -----------------------------------------------------------------------------
+// ESP-01 generic esp8266 board with 512 kB flash
+// // -----------------------------------------------------------------------------
+
+#elif defined(GENERIC_ESP01_512KB)
+
+    // Info
+    #define MANUFACTURER        "GENERIC"
+    #define DEVICE              "ESP01_512KB"
+
+    // Relays
+    #define RELAY1_PIN          2
+    #ifndef RELAY1_TYPE
+    #define RELAY1_TYPE         RELAY_TYPE_NORMAL
+    #endif
+
 // -----------------------------------------------------------------------------
 
 #else
diff --git a/code/platformio.ini b/code/platformio.ini
index 30976b99..7276f967 100644
--- a/code/platformio.ini
+++ b/code/platformio.ini
@@ -72,6 +72,7 @@ debug_flags = -DDEBUG_ESP_CORE -DDEBUG_ESP_SSL -DDEBUG_ESP_WIFI -DDEBUG_ESP_HTTP
 #     TLS_RSA_WITH_AES_256_CBC_SHA / AES256-SHA
 #  This reduces the OTA size with ~45KB, so it's especially useful on low memory boards (512k/1m).
 # ------------------------------------------------------------------------------
+board_512k = esp01
 board_1m = esp01_1m
 board_2m = esp_wroom_02
 board_4m = esp12e
@@ -956,3 +957,6 @@ build_flags = ${common.build_flags_1m0m} -DEHOMEDIY_WT02
 board = ${common.board_1m}
 build_flags = ${common.build_flags_1m0m} -DEHOMEDIY_WT03
 
+[env:generic-esp01-512kb]
+board = ${common.board_512k}
+build_flags = ${common.build_flags_512k} -DGENERIC_ESP01_512KB