diff --git a/prj/TCPClient/Debug/mini212g2.c b/prj/TCPClient/Debug/mini212g2.c
index b0432bb..903494e 100644
--- a/prj/TCPClient/Debug/mini212g2.c
+++ b/prj/TCPClient/Debug/mini212g2.c
@@ -48,6 +48,10 @@ static const uint8_t CMD_SHUTTER[] =
 static const uint8_t CMD_QUERY_DIGITAL[] =
     {0x55, 0xAA, 0x07, 0x02, 0x01, 0x80, 0x00, 0x00, 0x00, 0x00, 0x84, 0xF0};
 
+/* Query: status page (simplest query, always works) */
+static const uint8_t CMD_QUERY_STATUS[] =
+    {0x55, 0xAA, 0x07, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0x00, 0x87, 0xF0};
+
 /* ============================================================
  * Low-level UART helpers
  * ============================================================ */
@@ -142,8 +146,9 @@ static void Sensor_FlushRx(void)
  * ============================================================ */
 volatile uint8_t  sensor_init_ok       = 0;
 volatile uint8_t  sensor_init_fail     = 0;
-volatile uint8_t  sensor_last_resp[8]  = {0};
+volatile uint8_t  sensor_last_resp[32] = {0};
 volatile uint8_t  sensor_last_resp_len = 0;
+volatile uint8_t  sensor_comm_test     = 0;
 
 int Mini212G2_SendCmd(const uint8_t *cmd, uint8_t len)
 {
@@ -154,7 +159,7 @@ int Mini212G2_SendCmd(const uint8_t *cmd, uint8_t len)
     int n = Sensor_ReadResp(resp, sizeof(resp), 200);
     /* Save last response for debugger inspection */
     sensor_last_resp_len = (uint8_t)n;
-    for (int j = 0; j < n && j < 8; j++)
+    for (int j = 0; j < n && j < 32; j++)
         sensor_last_resp[j] = resp[j];
 
     if (n == ACK_LEN && memcmp(resp, ACK_PATTERN, ACK_LEN) == 0)
@@ -185,6 +190,20 @@ int Mini212G2_Init(void)
     printf("[Sensor] Waiting 3s for sensor boot...\r\n");
     Delay_Ms(3000);
 
+    /* === Communication test: send status query === */
+    {
+        uint8_t test_resp[32];
+        Sensor_FlushRx();
+        Sensor_SendBytes(CMD_QUERY_STATUS, sizeof(CMD_QUERY_STATUS));
+        int tn = Sensor_ReadResp(test_resp, sizeof(test_resp), 500);
+        sensor_last_resp_len = (uint8_t)tn;
+        for (int j = 0; j < tn && j < 32; j++)
+            sensor_last_resp[j] = test_resp[j];
+        sensor_comm_test = (tn > 0) ? 1 : 0xFF;
+        /* Breakpoint here to check sensor_comm_test and sensor_last_resp */
+    }
+    Delay_Ms(200);
+
     printf("[Sensor] Configuring CMOS/DVP output...\r\n");
 
     /* 1. Shutter compensation */
diff --git a/prj/TCPClient/Debug/mini212g2.h b/prj/TCPClient/Debug/mini212g2.h
index 3f3e01f..0588c4f 100644
--- a/prj/TCPClient/Debug/mini212g2.h
+++ b/prj/TCPClient/Debug/mini212g2.h
@@ -35,8 +35,10 @@ int Mini212G2_Init(void);
  * sensor_last_resp_len: length of last response */
 extern volatile uint8_t  sensor_init_ok;
 extern volatile uint8_t  sensor_init_fail;
-extern volatile uint8_t  sensor_last_resp[8];
+extern volatile uint8_t  sensor_last_resp[32];
 extern volatile uint8_t  sensor_last_resp_len;
+/* sensor_comm_test: 0=not run, 1=got response, 0xFF=no response (timeout) */
+extern volatile uint8_t  sensor_comm_test;
 
 #if SENSOR_UART_ENABLE
 /**
diff --git a/prj/TCPClient/User/main.c b/prj/TCPClient/User/main.c
index dea78c0..4f5673c 100644
--- a/prj/TCPClient/User/main.c
+++ b/prj/TCPClient/User/main.c
@@ -10,6 +10,13 @@
 #include "FreeRTOS.h"
 #include "task.h"
 
+/* ============================================================
+ * TEST MODE: Generate simulated sensor data without real hardware.
+ * Set to 1 to enable test pattern generation (no sensor/DVP needed).
+ * Set to 0 for normal operation with real Mini212G2 sensor.
+ * ============================================================ */
+#define TEST_PATTERN_MODE    1
+
 #define MAX_TCP_PAYLOAD_SIZE 10240
 uint8_t g_TxNetBuffer_A_Mem[MAX_TCP_PAYLOAD_SIZE];
 uint8_t g_TxNetBuffer_B_Mem[MAX_TCP_PAYLOAD_SIZE];
@@ -208,9 +215,15 @@ static void task_heartbeat_entry(void *pvParameters)
     uint32_t cnt = 0;
     while (1)
     {
+#if TEST_PATTERN_MODE
+        printf("[HB] %d  tick=%d  TEST_MODE  frm=%d\r\n",
+               (int)cnt++, (int)xTaskGetTickCount(),
+               (int)dvp_frame_count);
+#else
         printf("[HB] %d  tick=%d  dvp_frm=%d row_irq=%d\r\n",
                (int)cnt++, (int)xTaskGetTickCount(),
                (int)dvp_frame_count, (int)dvp_row_irq_cnt);
+#endif
         vTaskDelay(pdMS_TO_TICKS(2000));
     }
 }
@@ -240,6 +253,94 @@ static uint8_t  burst_active       = 0;   /* 1 = currently in burst */
 static uint8_t  burst_remaining    = 0;   /* frames left to capture */
 static uint32_t burst_next_time_ms = 0;   /* next burst frame time */
 
+#if TEST_PATTERN_MODE
+/* ============================================================
+ * Test Pattern Generator
+ * Generates simulated 256x192 Y16 thermal images at ~10 FPS.
+ * Pattern cycles through several types so all pipeline paths
+ * can be exercised.
+ *
+ * Pattern 0: Gradient (25.00~45.00°C) — baseline, no trigger
+ * Pattern 1: Hot center spot (90.00°C) — should trigger alarm
+ * Pattern 2: Uniform warm (35.00°C) — no trigger
+ * Pattern 3: Checkerboard with hot cells — tests ROI search
+ * ============================================================ */
+#define TEST_FPS_DELAY_MS   100   /* ~10 FPS */
+#define TEMP_RAW(deg_c)     ((uint16_t)((deg_c) * 100))  /* e.g. 35.00°C → 3500 */
+
+static void test_fill_gradient(uint16_t *buf, uint16_t w, uint16_t h)
+{
+    /* Top-to-bottom gradient: 25°C at top → 45°C at bottom */
+    for (uint16_t y = 0; y < h; y++) {
+        uint16_t temp = TEMP_RAW(25.0) + (uint16_t)((uint32_t)y * TEMP_RAW(20.0) / h);
+        for (uint16_t x = 0; x < w; x++)
+            buf[y * w + x] = temp;
+    }
+}
+
+static void test_fill_hotspot(uint16_t *buf, uint16_t w, uint16_t h)
+{
+    /* Background 30°C, center 32x32 block at 90°C */
+    for (uint16_t y = 0; y < h; y++)
+        for (uint16_t x = 0; x < w; x++)
+            buf[y * w + x] = TEMP_RAW(30.0);
+    uint16_t cx = w / 2, cy = h / 2;
+    for (uint16_t y = cy - 16; y < cy + 16; y++)
+        for (uint16_t x = cx - 16; x < cx + 16; x++)
+            buf[y * w + x] = TEMP_RAW(90.0);
+}
+
+static void test_fill_uniform(uint16_t *buf, uint16_t w, uint16_t h)
+{
+    for (uint16_t y = 0; y < h; y++)
+        for (uint16_t x = 0; x < w; x++)
+            buf[y * w + x] = TEMP_RAW(35.0);
+}
+
+static void test_fill_checker(uint16_t *buf, uint16_t w, uint16_t h)
+{
+    /* 32x32 checkerboard: alternating 30°C and 85°C blocks */
+    for (uint16_t y = 0; y < h; y++)
+        for (uint16_t x = 0; x < w; x++) {
+            uint8_t cell = ((y / 32) + (x / 32)) & 1;
+            buf[y * w + x] = cell ? TEMP_RAW(85.0) : TEMP_RAW(30.0);
+        }
+}
+
+static void task_test_pattern_entry(void *pvParameters)
+{
+    (void)pvParameters;
+    uint32_t frame_num = 0;
+    uint8_t pattern_idx = 0;
+    /* Cycle: gradient x20, hotspot x5, uniform x10, checker x5 */
+    const uint8_t pattern_seq[] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+                                   1,1,1,1,1,
+                                   2,2,2,2,2,2,2,2,2,2,
+                                   3,3,3,3,3};
+    const uint8_t seq_len = sizeof(pattern_seq);
+
+    while (1)
+    {
+        uint16_t *buf = (uint16_t *)FrameBuffer;
+        switch (pattern_seq[pattern_idx % seq_len]) {
+            case 0: test_fill_gradient(buf, SENSOR_WIDTH, SENSOR_HEIGHT); break;
+            case 1: test_fill_hotspot(buf, SENSOR_WIDTH, SENSOR_HEIGHT);  break;
+            case 2: test_fill_uniform(buf, SENSOR_WIDTH, SENSOR_HEIGHT);  break;
+            case 3: test_fill_checker(buf, SENSOR_WIDTH, SENSOR_HEIGHT);  break;
+        }
+        pattern_idx++;
+        if (pattern_idx >= seq_len) pattern_idx = 0;
+
+        frame_num++;
+        dvp_frame_count = frame_num;
+        Ready_Frame_Count = frame_num;
+        Frame_Ready_Flag = 1;
+
+        vTaskDelay(pdMS_TO_TICKS(TEST_FPS_DELAY_MS));
+    }
+}
+#endif /* TEST_PATTERN_MODE */
+
 static void task_business_entry(void *pvParameters)
 {
     (void)pvParameters;
@@ -253,7 +354,9 @@ static void task_business_entry(void *pvParameters)
             g_ng_off_time = 0;
         }
 
+#if !TEST_PATTERN_MODE
         DVP_Task();
+#endif
 
         if (Frame_Ready_Flag)
         {
@@ -348,8 +451,13 @@ int main(void)
     for (i = 0; i < 6; i++) printf("%x ", MACAddr[i]);
     printf("\n");
 
+#if TEST_PATTERN_MODE
+    printf("=== TEST PATTERN MODE === No sensor/DVP hardware needed\r\n");
+    /* Skip Mini212G2_Init() and DVP_Init() */
+#else
     Mini212G2_Init();   /* Configure sensor for CMOS/DVP Y16 output */
     DVP_Init();
+#endif
     TIM2_Init();
     NG_GPIO_Init();
 
@@ -377,6 +485,9 @@ int main(void)
     xTaskCreate(task_wchnet_entry, "wchnet", 512, NULL, 6, NULL);
     xTaskCreate(task_business_entry, "business", 512, NULL, 5, NULL);
     xTaskCreate(task_heartbeat_entry, "hb", 256, NULL, 3, NULL);
+#if TEST_PATTERN_MODE
+    xTaskCreate(task_test_pattern_entry, "testpat", 256, NULL, 4, NULL);
+#endif
     DBG_APP("Starting scheduler\r\n");
     vTaskStartScheduler();