diff --git a/openBeken_win32_mvsc2017.vcxproj b/openBeken_win32_mvsc2017.vcxproj
index 7648b8a5c..a4eb06f8e 100644
--- a/openBeken_win32_mvsc2017.vcxproj
+++ b/openBeken_win32_mvsc2017.vcxproj
@@ -261,6 +261,7 @@
     <ClCompile Include="src\driver\drv_spi_flash.c" />
     <ClCompile Include="src\driver\drv_ssdp.c" />
     <ClCompile Include="src\driver\drv_tasmotaDeviceGroups.c" />
+    <ClCompile Include="src\driver\drv_tca9554.c" />
     <ClCompile Include="src\driver\drv_tclAC.c" />
     <ClCompile Include="src\driver\drv_test.c" />
     <ClCompile Include="src\driver\drv_test_charts.c" />
diff --git a/openBeken_win32_mvsc2017.vcxproj.filters b/openBeken_win32_mvsc2017.vcxproj.filters
index aefd8e02f..f96af96e9 100644
--- a/openBeken_win32_mvsc2017.vcxproj.filters
+++ b/openBeken_win32_mvsc2017.vcxproj.filters
@@ -407,6 +407,7 @@
     <ClCompile Include="src\driver\drv_soft_spi.c" />
     <ClCompile Include="src\driver\drv_spi_flash.c" />
     <ClCompile Include="src\hal\win32\hal_ota_win32.c" />
+    <ClCompile Include="src\driver\drv_tca9554.c" />
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="src\base64\base64.h" />
diff --git a/platforms/obk_main.cmake b/platforms/obk_main.cmake
index 62747aa43..23c28a842 100644
--- a/platforms/obk_main.cmake
+++ b/platforms/obk_main.cmake
@@ -120,6 +120,7 @@ set(OBKM_SRC
 	${OBK_SRCS}driver/drv_spidma.c
 	${OBK_SRCS}driver/drv_ssdp.c
 	${OBK_SRCS}driver/drv_tasmotaDeviceGroups.c
+	${OBK_SRCS}driver/drv_tca9554.c
 	${OBK_SRCS}driver/drv_tclAC.c
 	${OBK_SRCS}driver/drv_test.c
 	${OBK_SRCS}driver/drv_test_drivers.c
diff --git a/src/driver/drv_local.h b/src/driver/drv_local.h
index 3ea200409..35df47d2c 100644
--- a/src/driver/drv_local.h
+++ b/src/driver/drv_local.h
@@ -186,6 +186,10 @@ void MAX6675_RunEverySecond(void);
 void MAX31855_Init();
 void MAX31855_RunEverySecond();
 
+void TCA9554_Init();
+void TCA9554_OnEverySecond();
+void TCA9554_OnChannelChanged(int ch, int value);
+
 void PWMG_Init();
 
 void Freeze_Init();
diff --git a/src/driver/drv_main.c b/src/driver/drv_main.c
index ba7c8b724..29392cb8b 100644
--- a/src/driver/drv_main.c
+++ b/src/driver/drv_main.c
@@ -46,6 +46,13 @@ static driver_t g_drivers[] = {
 	//drvdetail:"requires":""}
 	{ "tmSensor",	TuyaMCU_Sensor_Init, TuyaMCU_Sensor_RunEverySecond,	NULL, NULL, NULL, NULL, NULL, false },
 #endif
+#if ENABLE_DRIVER_TCA9554
+	//drvdetail:{"name":"TCA9554",
+	//drvdetail:"title":"TODO",
+	//drvdetail:"descr":"TCA9554.",
+	//drvdetail:"requires":""}
+	{ "TCA9554",		TCA9554_Init,			TCA9554_OnEverySecond,			NULL, NULL, NULL, TCA9554_OnChannelChanged , NULL, false },
+#endif
 #if ENABLE_DRIVER_FREEZE
 	//drvdetail:{"name":"FREEZE",
 	//drvdetail:"title":"TODO",
diff --git a/src/driver/drv_tca9554.c b/src/driver/drv_tca9554.c
new file mode 100644
index 000000000..4d944c30d
--- /dev/null
+++ b/src/driver/drv_tca9554.c
@@ -0,0 +1,87 @@
+#include "../new_common.h"
+#include "../new_pins.h"
+#include "../new_cfg.h"
+// Commands register, execution API and cmd tokenizer
+#include "../cmnds/cmd_public.h"
+#include "../mqtt/new_mqtt.h"
+#include "../logging/logging.h"
+#include "drv_local.h"
+#include "drv_uart.h"
+#include "../httpserver/new_http.h"
+#include "../hal/hal_pins.h"
+
+// default for ESP32-S3-ETH-8DI-8RO
+static int tca_adr = (0x20 << 1);
+#define TCA_CHANNELS 8
+
+static softI2C_t tcI2C;
+static int tca_firstChannel;
+static int tca_values = 0;
+
+// startDriver TCA9554 [SCL] [SDA] [FirstChannel] [Adr]
+// startDriver TCA9554 41 42 8
+// backlog stopDriver *; startDriver TCA9554 41 42 8 64
+/*
+startDriver TCA9554 41 42 0
+setChannelType 0 Toggle
+setChannelType 1 Toggle
+setChannelType 2 Toggle
+setChannelType 3 Toggle
+setChannelType 4 Toggle
+setChannelType 5 Toggle
+setChannelType 6 Toggle
+setChannelType 7 Toggle
+
+
+*/
+void TCA9554_Init() {
+	tcI2C.pin_clk = Tokenizer_GetArgIntegerDefault(1, 41);
+	tcI2C.pin_data = Tokenizer_GetArgIntegerDefault(2, 42);
+	tca_firstChannel = Tokenizer_GetArgIntegerDefault(3, 8);
+	tca_adr = Tokenizer_GetArgIntegerDefault(4, tca_adr);
+
+	Soft_I2C_PreInit(&tcI2C);
+
+	rtos_delay_milliseconds(1);
+	Soft_I2C_Start(&tcI2C, tca_adr);
+	Soft_I2C_WriteByte(&tcI2C, 0x03);
+	Soft_I2C_WriteByte(&tcI2C, 0x00);
+	Soft_I2C_Stop(&tcI2C);
+}
+void TCA9954_ApplyChanges() {
+	Soft_I2C_Start(&tcI2C, tca_adr);
+	Soft_I2C_WriteByte(&tcI2C, 0x01);
+	Soft_I2C_WriteByte(&tcI2C, tca_values);
+	Soft_I2C_Stop(&tcI2C);
+}
+void TCA9554_OnChannelChanged(int ch, int value) {
+	if (ch >= tca_firstChannel && ch < (tca_firstChannel + TCA_CHANNELS)) {
+		int local = ch - tca_firstChannel;
+		if (value) {
+			tca_values |= (1 << local);  // set bit
+		}
+		else {
+			tca_values &= ~(1 << local); // clear bit
+		}
+		TCA9954_ApplyChanges(); // write changes to TCA9554
+	}
+}
+
+void TCA9554_OnEverySecond()
+{
+	//static int x = 0;
+	//// launch measurement on sensor. 
+	//Soft_I2C_Start(&tcI2C, tca_adr);
+	//Soft_I2C_WriteByte(&tcI2C, 0x03);
+	//Soft_I2C_WriteByte(&tcI2C, 0x00);
+	//Soft_I2C_Stop(&tcI2C);
+
+	//rtos_delay_milliseconds(12);
+	//Soft_I2C_Start(&tcI2C, tca_adr);
+	//Soft_I2C_WriteByte(&tcI2C, 0x01);
+	//Soft_I2C_WriteByte(&tcI2C, x);
+	//Soft_I2C_Stop(&tcI2C);
+
+	//x = ~x;
+}
+
diff --git a/src/obk_config.h b/src/obk_config.h
index 0a877d1ae..719873553 100644
--- a/src/obk_config.h
+++ b/src/obk_config.h
@@ -116,6 +116,7 @@
 
 #endif
 
+#define ENABLE_DRIVER_TCA9554					1
 #define ENABLE_DRIVER_PINMUTEX					1
 #define ENABLE_DRIVER_TESTSPIFLASH				1
 
@@ -392,6 +393,10 @@
 #define ENABLE_OBK_BERRY						1
 #endif
 
+#if (OBK_VARIANT == OBK_VARIANT_ESP4M)
+#define ENABLE_DRIVER_TCA9554					1
+#endif
+
 #elif PLATFORM_TR6260
 
 // #define ENABLE_SEND_POSTANDGET				1