diff --git a/README.md b/README.md
index 792f657565..316a1d90bb 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ This repository hosts ESP32 series Soc compatible driver for image sensors. Addi
 | OV7725  | 640 x 480      | color      | Raw RGB<br/>GRB 422<br/>RGB565/555/444<br/>YCbCr 422         | 1/4"     |
 | NT99141 | 1280 x 720     | color      | YCbCr 422<br/>RGB565/555/444<br/>Raw<br/>CCIR656<br/>JPEG compression | 1/4"     |
 | GC032A  | 640 x 480      | color      | YUV/YCbCr422<br/>RAW Bayer<br/>RGB565                        | 1/10"    |
-| GC0308  | 640 x 480      | color      | YUV/YCbCr422<br/>RAW Bayer<br/>RGB565                        | 1/6.5"   |
+| GC0308  | 640 x 480      | color      | YUV/YCbCr422<br/>RAW Bayer<br/>RGB565<br/>Grayscale                         | 1/6.5"   |
 | GC2145  | 1600 x 1200    | color      | YUV/YCbCr422<br/>RAW Bayer<br/>RGB565                        | 1/5"     |
 | BF3005  | 640 x 480      | color      | YUV/YCbCr422<br/>RAW Bayer<br/>RGB565                        | 1/4"     |
 | BF20A6  | 640 x 480      | color      | YUV/YCbCr422<br/>RAW Bayer<br/>Only Y                        | 1/10"    |
diff --git a/sensors/gc0308.c b/sensors/gc0308.c
index f19025ebb3..176f012ac0 100644
--- a/sensors/gc0308.c
+++ b/sensors/gc0308.c
@@ -160,6 +160,10 @@ static int set_pixformat(sensor_t *sensor, pixformat_t pixformat)
         write_reg(sensor->slv_addr, 0xfe, 0x00);
         ret = set_reg_bits(sensor->slv_addr, 0x24, 0, 0x0f, 2); //yuv422 Y Cb Y Cr
         break;
+    case PIXFORMAT_GRAYSCALE:
+        write_reg(sensor->slv_addr, 0xfe, 0x00);
+        ret = write_reg(sensor->slv_addr, 0x24, 0xb1);
+        break;
     default:
         ESP_LOGW(TAG, "unsupport format");
         ret = -1;
diff --git a/target/esp32/ll_cam.c b/target/esp32/ll_cam.c
index e1a2fee719..4c486444c8 100644
--- a/target/esp32/ll_cam.c
+++ b/target/esp32/ll_cam.c
@@ -491,7 +491,7 @@ size_t IRAM_ATTR ll_cam_memcpy(cam_obj_t *cam, uint8_t *out, const uint8_t *in,
 esp_err_t ll_cam_set_sample_mode(cam_obj_t *cam, pixformat_t pix_format, uint32_t xclk_freq_hz, uint16_t sensor_pid)
 {
     if (pix_format == PIXFORMAT_GRAYSCALE) {
-        if (sensor_pid == OV3660_PID || sensor_pid == OV5640_PID || sensor_pid == NT99141_PID || sensor_pid == SC031GS_PID || sensor_pid == BF20A6_PID) {
+        if (sensor_pid == OV3660_PID || sensor_pid == OV5640_PID || sensor_pid == NT99141_PID || sensor_pid == SC031GS_PID || sensor_pid == BF20A6_PID || sensor_pid == GC0308_PID) {
             if (xclk_freq_hz > 10000000) {
                 sampling_mode = SM_0A00_0B00;
                 dma_filter = ll_cam_dma_filter_yuyv_highspeed;
diff --git a/target/esp32s2/ll_cam.c b/target/esp32s2/ll_cam.c
index 93313e8f38..a1a7479b9c 100644
--- a/target/esp32s2/ll_cam.c
+++ b/target/esp32s2/ll_cam.c
@@ -394,7 +394,7 @@ size_t IRAM_ATTR ll_cam_memcpy(cam_obj_t *cam, uint8_t *out, const uint8_t *in,
 esp_err_t ll_cam_set_sample_mode(cam_obj_t *cam, pixformat_t pix_format, uint32_t xclk_freq_hz, uint16_t sensor_pid)
 {
     if (pix_format == PIXFORMAT_GRAYSCALE) {
-        if (sensor_pid == OV3660_PID || sensor_pid == OV5640_PID || sensor_pid == NT99141_PID || sensor_pid == SC031GS_PID || sensor_pid == BF20A6_PID) {
+        if (sensor_pid == OV3660_PID || sensor_pid == OV5640_PID || sensor_pid == NT99141_PID || sensor_pid == SC031GS_PID || sensor_pid == BF20A6_PID || sensor_pid == GC0308_PID) {
             cam->in_bytes_per_pixel = 1;       // camera sends Y8
         } else {
             cam->in_bytes_per_pixel = 2;       // camera sends YU/YV
diff --git a/target/esp32s3/ll_cam.c b/target/esp32s3/ll_cam.c
index 28a260384d..515bfe1546 100644
--- a/target/esp32s3/ll_cam.c
+++ b/target/esp32s3/ll_cam.c
@@ -493,7 +493,7 @@ size_t IRAM_ATTR ll_cam_memcpy(cam_obj_t *cam, uint8_t *out, const uint8_t *in,
 esp_err_t ll_cam_set_sample_mode(cam_obj_t *cam, pixformat_t pix_format, uint32_t xclk_freq_hz, uint16_t sensor_pid)
 {
     if (pix_format == PIXFORMAT_GRAYSCALE) {
-        if (sensor_pid == OV3660_PID || sensor_pid == OV5640_PID || sensor_pid == NT99141_PID || sensor_pid == SC031GS_PID || sensor_pid == BF20A6_PID) {
+        if (sensor_pid == OV3660_PID || sensor_pid == OV5640_PID || sensor_pid == NT99141_PID || sensor_pid == SC031GS_PID || sensor_pid == BF20A6_PID || sensor_pid == GC0308_PID) {
             cam->in_bytes_per_pixel = 1;       // camera sends Y8
         } else {
             cam->in_bytes_per_pixel = 2;       // camera sends YU/YV