diff --git a/code/espurna/config/hardware.h b/code/espurna/config/hardware.h
index c68354c4..5fcb29ef 100644
--- a/code/espurna/config/hardware.h
+++ b/code/espurna/config/hardware.h
@@ -277,6 +277,18 @@
     #define DUMMY_RELAY_COUNT   6
     #define TRACK_RELAY_STATUS  0
 
+#elif defined(SONOFF_B1)
+
+    #define MANUFACTURER        "ITEAD"
+    #define DEVICE              "SONOFF_B1"
+    #define RELAY_PROVIDER      RELAY_PROVIDER_LIGHT
+    #define LIGHT_PROVIDER      LIGHT_PROVIDER_MY9192
+    #define DUMMY_RELAY_COUNT   1
+
+    #define MY9291_DI_PIN       13
+    #define MY9291_DCKI_PIN     15
+    #define MY9291_COMMAND      MY9291_COMMAND_DEFAULT
+
 // -----------------------------------------------------------------------------
 // Electrodragon boards
 // -----------------------------------------------------------------------------
diff --git a/code/espurna/hardware.ino b/code/espurna/hardware.ino
index c29cc594..00e05e7c 100644
--- a/code/espurna/hardware.ino
+++ b/code/espurna/hardware.ino
@@ -314,6 +314,14 @@ void hwUpwardsCompatibility() {
         setSetting("relayLogic", 4, 0);
     #endif
 
+    #ifdef SONOFF_B1
+        setSetting("board", 28);
+        setSetting("relayProvider", RELAY_PROVIDER_LIGHT);
+        setSetting("lightProvider", LIGHT_PROVIDER_MY9192);
+        setSetting("myDIGPIO", 12);
+        setSetting("myDCKIGPIO", 14);
+    #endif
+
     saveSettings();
 
 }
diff --git a/code/platformio.ini b/code/platformio.ini
index 03fcc812..d237ff56 100644
--- a/code/platformio.ini
+++ b/code/platformio.ini
@@ -1,4 +1,4 @@
-4ch[platformio]
+[platformio]
 env_default = d1-debug
 src_dir = espurna
 data_dir = espurna/data
@@ -283,6 +283,27 @@ upload_speed = 115200
 upload_port = "192.168.4.1"
 upload_flags = --auth=fibonacci --port 8266
 
+[env:sonoff-b1-debug]
+platform = espressif8266
+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} -DSONOFF_B1
+
+[env:sonoff-b1-debug-ota]
+platform = espressif8266
+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} -DSONOFF_B1
+upload_speed = 115200
+upload_port = "192.168.4.1"
+upload_flags = --auth=fibonacci --port 8266
+
 [env:rfbridge-debug]
 platform = espressif8266
 framework = arduino