diff --git a/code/espurna/config/hardware.h b/code/espurna/config/hardware.h
index fa38822d..c68354c4 100644
--- a/code/espurna/config/hardware.h
+++ b/code/espurna/config/hardware.h
@@ -190,6 +190,33 @@
     #define LED1_PIN            13
     #define LED1_PIN_INVERSE    1
 
+#elif defined(SONOFF_4CH_PRO)
+
+    #define MANUFACTURER        "ITEAD"
+    #define DEVICE              "SONOFF_4CH_PRO"
+    #define BUTTON1_PIN         0
+    #define BUTTON1_RELAY       1
+    #define BUTTON1_MODE        BUTTON_PUSHBUTTON | BUTTON_DEFAULT_HIGH
+    #define BUTTON2_PIN         9
+    #define BUTTON2_RELAY       2
+    #define BUTTON2_MODE        BUTTON_PUSHBUTTON | BUTTON_DEFAULT_HIGH
+    #define BUTTON3_PIN         10
+    #define BUTTON3_RELAY       3
+    #define BUTTON3_MODE        BUTTON_PUSHBUTTON | BUTTON_DEFAULT_HIGH
+    #define BUTTON4_PIN         14
+    #define BUTTON4_RELAY       4
+    #define BUTTON4_MODE        BUTTON_PUSHBUTTON | BUTTON_DEFAULT_HIGH
+    #define RELAY1_PIN          12
+    #define RELAY1_PIN_INVERSE  0
+    #define RELAY2_PIN          5
+    #define RELAY2_PIN_INVERSE  0
+    #define RELAY3_PIN          4
+    #define RELAY3_PIN_INVERSE  0
+    #define RELAY4_PIN          15
+    #define RELAY4_PIN_INVERSE  0
+    #define LED1_PIN            13
+    #define LED1_PIN_INVERSE    1
+
 #elif defined(ITEAD_1CH_INCHING)
 
     // The inching functionality is managed by a misterious IC in the board.
diff --git a/code/espurna/hardware.ino b/code/espurna/hardware.ino
index fca50029..c29cc594 100644
--- a/code/espurna/hardware.ino
+++ b/code/espurna/hardware.ino
@@ -292,6 +292,28 @@ void hwUpwardsCompatibility() {
         setSetting("relayProvider", RELAY_PROVIDER_RFBRIDGE);
     #endif
 
+    #ifdef SONOFF_4CH_PRO
+        setSetting("board", 27);
+        setSetting("ledGPIO", 1, 13);
+        setSetting("ledLogic", 1, 1);
+        setSetting("btnGPIO", 1, 0);
+        setSetting("btnGPIO", 2, 9);
+        setSetting("btnGPIO", 3, 10);
+        setSetting("btnGPIO", 4, 14);
+        setSetting("btnRelay", 1, 2);
+        setSetting("btnRelay", 2, 3);
+        setSetting("btnRelay", 3, 4);
+        setSetting("btnRelay", 4, 0);
+        setSetting("relayGPIO", 1, 12);
+        setSetting("relayGPIO", 2, 5);
+        setSetting("relayGPIO", 3, 4);
+        setSetting("relayGPIO", 4, 15);
+        setSetting("relayLogic", 1, 0);
+        setSetting("relayLogic", 2, 0);
+        setSetting("relayLogic", 3, 0);
+        setSetting("relayLogic", 4, 0);
+    #endif
+
     saveSettings();
 
 }
diff --git a/code/platformio.ini b/code/platformio.ini
index 1743e8f6..03fcc812 100644
--- a/code/platformio.ini
+++ b/code/platformio.ini
@@ -1,4 +1,4 @@
-[platformio]
+4ch[platformio]
 env_default = d1-debug
 src_dir = espurna
 data_dir = espurna/data
@@ -199,6 +199,27 @@ upload_speed = 115200
 upload_port = "192.168.4.1"
 upload_flags = --auth=fibonacci --port 8266
 
+[env:sonoff-4ch-pro-debug]
+platform = espressif8266
+framework = arduino
+board = esp8285
+board_flash_mode = dout
+lib_deps = ${common.lib_deps}
+lib_ignore = ${common.lib_ignore}
+build_flags = ${common.build_flags_1m} -DSONOFF_4CH_PRO
+
+[env:sonoff-4ch-pro-debug-ota]
+platform = espressif8266
+framework = arduino
+board = esp8285
+board_flash_mode = dout
+lib_deps = ${common.lib_deps}
+lib_ignore = ${common.lib_ignore}
+build_flags = ${common.build_flags_1m} -DSONOFF_4CH_PRO
+upload_speed = 115200
+upload_port = "192.168.4.1"
+upload_flags = --auth=fibonacci --port 8266
+
 [env:sonoff-touch-debug]
 platform = espressif8266
 framework = arduino