feat(camera): advertise sensor-supported resolutions in MCP description

docs/custom-board.md

@@ -475,6 +475,12 @@ Supported LCD families include:
 - `RndisBoard` - RNDIS-over-USB networking (ESP32-S3 / ESP32-P4).
 - `EspVideo` helpers for ESP-Video on ESP32-S3 / ESP32-P4.
 
+### Camera / vision explain resolution
+
+- `Esp32Camera` and other `Camera` implementations power MCP `self.camera.take_photo`.
+- Set the board default capture size in the board `.cc` via `camera_config_t.frame_size`, and/or define a board `config.h` macro such as `CAMERA_FRAME_SIZE_NAME` (`"QVGA"`, `"VGA"`, `"SVGA"`, `"UXGA"`, ...) and apply it with `Camera::SetFrameSize()` after init (see `atoms3r-cam-m12-echo-base`).
+- Callers can also pass an optional per-request `resolution` argument to `self.camera.take_photo`. `Esp32Camera` reports sensor-supported modes through `GetSupportedFrameSizeNames()` (from `esp_camera_sensor_get_info()->max_size`), and MCP embeds that list in the tool description at registration time. Higher resolutions improve text/label reading but need more PSRAM and longer uploads. Init at a size the sensor can actually support; `Esp32Camera::SetFrameSize` will reinit when a larger framebuffer is required.
+
 ### Input helpers
 
 - `Button` - standard push buttons (click, long-press, multi-click).

docs/mcp-usage.md

@@ -105,7 +105,7 @@ A tool registered this way will not appear in a regular `tools/list` response. T
 | `self.audio_speaker.set_volume` | Set speaker volume (`volume`: 0-100). |
 | `self.screen.set_brightness` | Set screen brightness when a backlight is available (`brightness`: 0-100). |
 | `self.screen.set_theme` | Switch UI theme (`theme`: `"light"` or `"dark"`), when LVGL is enabled. |
-| `self.camera.take_photo` | Take a picture with the on-board camera (when the board has one) and answer the given `question` about it. |
+| `self.camera.take_photo` | Take a picture with the on-board camera (when the board has one) and answer the given `question` about it. When the driver can enumerate sensor modes, the tool description lists the device-supported `resolution` values (e.g. `QVGA` / `VGA` / `SVGA` / … up to the sensor max) and the current default. Higher values help with text/label reading but use more RAM and upload time. |
 
 Board-specific tools are appended after these by each board's `InitializeTools()`.
 

docs/mcp-usage_zh.md

@@ -109,6 +109,24 @@ void InitializeTools() {
 }
 ```
 
+### 5. 摄像头拍照解释（可选分辨率）
+```json
+{
+  "jsonrpc": "2.0",
+  "method": "tools/call",
+  "params": {
+    "name": "self.camera.take_photo",
+    "arguments": {
+      "question": "请读出图片中的文字",
+      "resolution": "SVGA"
+    }
+  },
+  "id": 5
+}
+```
+
+`resolution` 为可选参数。设备会在 MCP 工具描述中写入当前摄像头传感器实际支持的分辨率列表（以及默认值）；不传则使用板级默认值。更高分辨率有利于识别细小文字，但会占用更多内存并增加上传时间。
+
 ## 备注
 - 工具名称、参数及返回值请以设备端 `AddTool` 注册为准。
 - 推荐所有新项目统一采用 MCP 协议进行物联网控制。

main/boards/common/camera.h

@@ -12,6 +12,15 @@ public:
     virtual bool SetHMirror(bool enabled) = 0;
     virtual bool SetVFlip(bool enabled) = 0;
     virtual bool SetSwapBytes(bool enabled) { return false; }  // Optional, default no-op
+    // Optional capture resolution for vision/explain. Accepted names include:
+    // QQVGA, QVGA, HVGA, VGA, SVGA, XGA, HD, SXGA, UXGA (case-insensitive).
+    // Empty string is a no-op (returns true). Non-empty default returns false (unsupported).
+    virtual bool SetFrameSize(const std::string& frame_size) { return frame_size.empty(); }
+    // Comma-separated named resolutions supported by this camera (e.g. "QVGA, VGA, SVGA").
+    // Empty when the driver does not expose selectable resolutions.
+    virtual std::string GetSupportedFrameSizeNames() const { return {}; }
+    // Current capture resolution name when known (e.g. "SVGA"); empty otherwise.
+    virtual std::string GetFrameSizeName() const { return {}; }
     virtual std::string Explain(const std::string& question) = 0;
 };
 

main/boards/common/esp32_camera.cc

@@ -1,24 +1,30 @@
 #include "sdkconfig.h"
 
 #include <esp_heap_caps.h>
-#include <cstdio>
-#include <cstring>
 #include <esp_log.h>
+#include <esp_timer.h>
 #include <img_converters.h>
 
-#include "esp32_camera.h"
+#include <algorithm>
+#include <cctype>
+#include <cstdio>
+#include <cstring>
+
 #include "board.h"
 #include "display.h"
+#include "esp32_camera.h"
+#include "jpg/image_to_jpeg.h"
 #include "lvgl_display.h"
 #include "mcp_server.h"
 #include "system_info.h"
-#include "jpg/image_to_jpeg.h"
-#include "esp_timer.h"
 
 #define TAG "Esp32Camera"
 
 Esp32Camera::Esp32Camera(const camera_config_t& config) {
-    esp_err_t err = esp_camera_init(&config);
+    config_ = config;
+    frame_size_ = config.frame_size;
+
+    esp_err_t err = esp_camera_init(&config_);
     if (err != ESP_OK) {
         ESP_LOGE(TAG, "esp_camera_init failed with error 0x%x", err);
         return;
@@ -28,8 +34,10 @@ Esp32Camera::Esp32Camera(const camera_config_t &config) {
     if (s) {
         if (s->id.PID == GC0308_PID) {
             s->set_hmirror(s, 0);  // Control camera mirror: 1 for mirror, 0 for normal
+            hmirror_ = false;
         }
-        ESP_LOGI(TAG, "Camera initialized: format=%d", config.pixel_format);
+        ESP_LOGI(TAG, "Camera initialized: format=%d, frame_size=%d", config_.pixel_format,
+                 (int)frame_size_);
     }
 
     streaming_on_ = true;
@@ -135,6 +143,7 @@ bool Esp32Camera::SetHMirror(bool enabled) {
         return false;
     }
     s->set_hmirror(s, enabled ? 1 : 0);
+    hmirror_ = enabled;
     return true;
 }
 
@@ -144,6 +153,7 @@ bool Esp32Camera::SetVFlip(bool enabled) {
         return false;
     }
     s->set_vflip(s, enabled ? 1 : 0);
+    vflip_ = enabled;
     return true;
 }
 
@@ -152,6 +162,228 @@ bool Esp32Camera::SetSwapBytes(bool enabled) {
     return true;
 }
 
+// Named sizes exposed to MCP / board config. Keep in sync with ParseFrameSize.
+static const struct {
+    framesize_t size;
+    const char* name;
+} kNamedFrameSizes[] = {
+    {FRAMESIZE_QQVGA, "QQVGA"}, {FRAMESIZE_QVGA, "QVGA"},   {FRAMESIZE_HVGA, "HVGA"},
+    {FRAMESIZE_VGA, "VGA"},     {FRAMESIZE_SVGA, "SVGA"},   {FRAMESIZE_XGA, "XGA"},
+    {FRAMESIZE_HD, "HD"},       {FRAMESIZE_SXGA, "SXGA"},   {FRAMESIZE_UXGA, "UXGA"},
+    {FRAMESIZE_FHD, "FHD"},     {FRAMESIZE_QXGA, "QXGA"},   {FRAMESIZE_QHD, "QHD"},
+    {FRAMESIZE_WQXGA, "WQXGA"}, {FRAMESIZE_QSXGA, "QSXGA"},
+};
+
+const char* Esp32Camera::FrameSizeToName(framesize_t frame_size) {
+    for (const auto& entry : kNamedFrameSizes) {
+        if (entry.size == frame_size) {
+            return entry.name;
+        }
+    }
+    return nullptr;
+}
+
+framesize_t Esp32Camera::GetSensorMaxFrameSize() const {
+    sensor_t* s = esp_camera_sensor_get();
+    if (s != nullptr) {
+        // esp_camera_sensor_get_info takes a non-const sensor_id_t*.
+        sensor_id_t id = s->id;
+        camera_sensor_info_t* info = esp_camera_sensor_get_info(&id);
+        if (info != nullptr && info->max_size < FRAMESIZE_INVALID) {
+            return info->max_size;
+        }
+    }
+    // Fall back to the largest size we have already configured successfully.
+    return config_.frame_size > frame_size_ ? config_.frame_size : frame_size_;
+}
+
+bool Esp32Camera::ParseFrameSize(const std::string& name, framesize_t* out) {
+    if (out == nullptr || name.empty()) {
+        return false;
+    }
+
+    std::string n = name;
+    n.erase(std::remove_if(n.begin(), n.end(),
+                           [](unsigned char c) { return std::isspace(c) || c == '_' || c == '-'; }),
+            n.end());
+    std::transform(n.begin(), n.end(), n.begin(),
+                   [](unsigned char c) { return static_cast<char>(std::toupper(c)); });
+
+    // Common aliases used by boards / MCP callers.
+    if (n == "96X96") {
+        *out = FRAMESIZE_96X96;
+    } else if (n == "QQVGA") {
+        *out = FRAMESIZE_QQVGA;
+    } else if (n == "QCIF") {
+        *out = FRAMESIZE_QCIF;
+    } else if (n == "HQVGA") {
+        *out = FRAMESIZE_HQVGA;
+    } else if (n == "240X240") {
+        *out = FRAMESIZE_240X240;
+    } else if (n == "QVGA") {
+        *out = FRAMESIZE_QVGA;
+    } else if (n == "CIF") {
+        *out = FRAMESIZE_CIF;
+    } else if (n == "HVGA") {
+        *out = FRAMESIZE_HVGA;
+    } else if (n == "VGA") {
+        *out = FRAMESIZE_VGA;
+    } else if (n == "SVGA") {
+        *out = FRAMESIZE_SVGA;
+    } else if (n == "XGA") {
+        *out = FRAMESIZE_XGA;
+    } else if (n == "HD") {
+        *out = FRAMESIZE_HD;
+    } else if (n == "SXGA") {
+        *out = FRAMESIZE_SXGA;
+    } else if (n == "UXGA") {
+        *out = FRAMESIZE_UXGA;
+    } else if (n == "FHD") {
+        *out = FRAMESIZE_FHD;
+    } else if (n == "QXGA") {
+        *out = FRAMESIZE_QXGA;
+    } else if (n == "QHD") {
+        *out = FRAMESIZE_QHD;
+    } else if (n == "WQXGA") {
+        *out = FRAMESIZE_WQXGA;
+    } else if (n == "QSXGA" || n == "5MP") {
+        *out = FRAMESIZE_QSXGA;
+    } else {
+        return false;
+    }
+    return true;
+}
+
+bool Esp32Camera::ApplyFrameSize(framesize_t frame_size) {
+    if (!streaming_on_) {
+        return false;
+    }
+    if (frame_size == frame_size_) {
+        return true;
+    }
+    if (frame_size >= FRAMESIZE_INVALID) {
+        return false;
+    }
+
+    if (encoder_thread_.joinable()) {
+        encoder_thread_.join();
+    }
+
+    const resolution_info_t& wanted = resolution[frame_size];
+    const resolution_info_t& allocated = resolution[config_.frame_size];
+    const size_t wanted_pixels = (size_t)wanted.width * (size_t)wanted.height;
+    const size_t allocated_pixels = (size_t)allocated.width * (size_t)allocated.height;
+
+    // Prefer a lightweight sensor-only change when the existing framebuffer is large enough.
+    if (wanted_pixels <= allocated_pixels) {
+        sensor_t* s = esp_camera_sensor_get();
+        if (s == nullptr) {
+            return false;
+        }
+        if (s->set_framesize(s, frame_size) != 0) {
+            ESP_LOGE(TAG, "set_framesize failed for %dx%d", wanted.width, wanted.height);
+            return false;
+        }
+        frame_size_ = frame_size;
+        ESP_LOGI(TAG, "Camera frame size set to %dx%d", wanted.width, wanted.height);
+        return true;
+    }
+
+    // Larger than the current framebuffer allocation: reinit the driver.
+    if (current_fb_) {
+        esp_camera_fb_return(current_fb_);
+        current_fb_ = nullptr;
+    }
+    if (encode_buf_) {
+        heap_caps_free(encode_buf_);
+        encode_buf_ = nullptr;
+        encode_buf_size_ = 0;
+    }
+
+    framesize_t previous_size = frame_size_;
+    framesize_t previous_alloc = config_.frame_size;
+    esp_camera_deinit();
+    streaming_on_ = false;
+
+    config_.frame_size = frame_size;
+    esp_err_t err = esp_camera_init(&config_);
+    if (err != ESP_OK) {
+        ESP_LOGE(TAG, "esp_camera_init failed while switching to %dx%d: 0x%x", wanted.width,
+                 wanted.height, err);
+        // Best-effort restore of the previous configuration.
+        config_.frame_size = previous_alloc;
+        err = esp_camera_init(&config_);
+        if (err != ESP_OK) {
+            ESP_LOGE(TAG, "Failed to restore previous camera configuration: 0x%x", err);
+            return false;
+        }
+        streaming_on_ = true;
+        frame_size_ = previous_alloc;
+        sensor_t* s = esp_camera_sensor_get();
+        if (s) {
+            s->set_hmirror(s, hmirror_ ? 1 : 0);
+            s->set_vflip(s, vflip_ ? 1 : 0);
+            if (previous_size != previous_alloc) {
+                s->set_framesize(s, previous_size);
+                frame_size_ = previous_size;
+            }
+        }
+        return false;
+    }
+
+    streaming_on_ = true;
+    frame_size_ = frame_size;
+    sensor_t* s = esp_camera_sensor_get();
+    if (s) {
+        s->set_hmirror(s, hmirror_ ? 1 : 0);
+        s->set_vflip(s, vflip_ ? 1 : 0);
+    }
+    ESP_LOGI(TAG, "Camera reinitialized at %dx%d", wanted.width, wanted.height);
+    return true;
+}
+
+bool Esp32Camera::SetFrameSize(const std::string& frame_size) {
+    if (frame_size.empty()) {
+        return true;
+    }
+
+    framesize_t fs;
+    if (!ParseFrameSize(frame_size, &fs)) {
+        ESP_LOGE(TAG, "Unknown camera frame size '%s'", frame_size.c_str());
+        return false;
+    }
+    framesize_t max_size = GetSensorMaxFrameSize();
+    if (fs > max_size) {
+        ESP_LOGE(TAG, "Frame size '%s' exceeds sensor maximum", frame_size.c_str());
+        return false;
+    }
+    return ApplyFrameSize(fs);
+}
+
+std::string Esp32Camera::GetSupportedFrameSizeNames() const {
+    if (!streaming_on_) {
+        return {};
+    }
+
+    framesize_t max_size = GetSensorMaxFrameSize();
+    std::string names;
+    for (const auto& entry : kNamedFrameSizes) {
+        if (entry.size > max_size) {
+            continue;
+        }
+        if (!names.empty()) {
+            names += ", ";
+        }
+        names += entry.name;
+    }
+    return names;
+}
+
+std::string Esp32Camera::GetFrameSizeName() const {
+    const char* name = FrameSizeToName(frame_size_);
+    return name != nullptr ? std::string(name) : std::string();
+}
+
 std::string Esp32Camera::Explain(const std::string &question) {
     if (explain_url_.empty()) {
         throw std::runtime_error("Image explain URL or token is not set");

main/boards/common/esp32_camera.h

@@ -22,7 +22,11 @@ struct JpegChunk
 class Esp32Camera : public Camera
 {
 private:
+    camera_config_t config_ = {};
+    framesize_t frame_size_ = FRAMESIZE_INVALID;
     bool streaming_on_ = false;
+    bool hmirror_ = false;
+    bool vflip_ = false;
     bool swap_bytes_enabled_ = true;  // Swap pixel byte order for RGB565, enabled by default
     std::string explain_url_;
     std::string explain_token_;
@@ -31,6 +35,11 @@ private:
     uint8_t *encode_buf_ = nullptr;  // Buffer for JPEG encoding (with optional byte swap)
     size_t encode_buf_size_ = 0;
 
+    static bool ParseFrameSize(const std::string &name, framesize_t *out);
+    static const char *FrameSizeToName(framesize_t frame_size);
+    framesize_t GetSensorMaxFrameSize() const;
+    bool ApplyFrameSize(framesize_t frame_size);
+
 public:
     Esp32Camera(const camera_config_t &config);
     ~Esp32Camera();
@@ -40,5 +49,8 @@ public:
     virtual bool SetHMirror(bool enabled) override;
     virtual bool SetVFlip(bool enabled) override;
     virtual bool SetSwapBytes(bool enabled) override;
+    virtual bool SetFrameSize(const std::string &frame_size) override;
+    virtual std::string GetSupportedFrameSizeNames() const override;
+    virtual std::string GetFrameSizeName() const override;
     virtual std::string Explain(const std::string &question) override;
 };

main/boards/m5stack/atoms3r-cam-m12-echo-base/README.md

@@ -35,6 +35,12 @@ idf.py menuconfig
 - `Partition Table` → `Custom partition CSV file` → 删除原有内容，输入 `partitions/v2/8m.csv`
 - `Serial flasher config` → `Flash size` → 选择 `8 MB`
 
+### 摄像头视觉分辨率
+
+- 默认捕获/解释分辨率在 `config.h` 的 `CAMERA_FRAME_SIZE_NAME` 中配置（M12 / OV3660 默认为 `"SVGA"`）。
+- AtomS3R-CAM（GC0308）会在传感器识别后限制到 `VGA`。
+- MCP 工具 `self.camera.take_photo` 支持可选参数 `resolution`（如 `"VGA"` / `"SVGA"` / `"UXGA"`），可按次覆盖默认值，便于细小文字识别。更高分辨率会占用更多 PSRAM 并增加上传耗时。
+
 按 `S` 保存，按 `Q` 退出。
 
 **编译**

main/boards/m5stack/atoms3r-cam-m12-echo-base/atoms3r_cam_m12_echo_base.cc

@@ -146,6 +146,8 @@ private:
         config.pin_reset = CAMERA_PIN_RESET;
         config.xclk_freq_hz = XCLK_FREQ_HZ;
         config.pixel_format = PIXFORMAT_RGB565;
+        // Start at QVGA so both GC0308 (AtomS3R-CAM) and OV3660 (AtomS3R-M12) can
+        // complete sensor init, then raise resolution for capable sensors.
         config.frame_size = FRAMESIZE_QVGA;
         config.jpeg_quality = 12;
         config.fb_count = 1;
@@ -160,8 +162,17 @@ private:
         sensor_t *sensor = esp_camera_sensor_get();
         if (sensor && sensor->id.PID == OV3660_PID) {
             camera_->SetHMirror(true);
+            // Prefer board-configured explain/capture resolution (default SVGA).
+            if (!camera_->SetFrameSize(CAMERA_FRAME_SIZE_NAME)) {
+                ESP_LOGW(TAG, "Failed to apply CAMERA_FRAME_SIZE_NAME=%s, keeping QVGA",
+                         CAMERA_FRAME_SIZE_NAME);
+            }
         } else {
             camera_->SetHMirror(false);
+            // GC0308 tops out around VGA; keep a modest default.
+            if (!camera_->SetFrameSize("VGA")) {
+                ESP_LOGW(TAG, "Failed to set VGA on non-OV3660 sensor, keeping QVGA");
+            }
         }
     }
 

main/boards/m5stack/atoms3r-cam-m12-echo-base/config.h

@@ -45,5 +45,12 @@
 #define CAMERA_XCLK_FREQ   (20000000)
 #define XCLK_FREQ_HZ CAMERA_XCLK_FREQ
 
+// Default capture/explain resolution name for OV3660 (AtomS3R-M12).
+// Accepted values match Camera::SetFrameSize (e.g. "QVGA", "VGA", "SVGA", "UXGA").
+// SVGA (800x600) balances text legibility against RAM/upload cost. GC0308
+// (AtomS3R-CAM) is clamped to VGA after sensor detection in the board file.
+#ifndef CAMERA_FRAME_SIZE_NAME
+#define CAMERA_FRAME_SIZE_NAME "SVGA"
+#endif
 
 #endif // _BOARD_CONFIG_H_

main/mcp_server.cc

@@ -99,19 +99,48 @@ void McpServer::AddCommonTools() {
 
     auto camera = board.GetCamera();
     if (camera) {
-        AddTool("self.camera.take_photo",
+        std::string description =
             "Always remember you have a camera. If the user asks you to see something, use this tool to take a photo and then explain it.\n"
             "Args:\n"
-            "  `question`: The question that you want to ask about the photo.\n"
-            "Return:\n"
-            "  A JSON object that provides the photo information.",
-            PropertyList({
+            "  `question`: The question that you want to ask about the photo.\n";
+
+        PropertyList properties({
             Property("question", kPropertyTypeString)
-            }),
-            [camera](const PropertyList& properties) -> ReturnValue {
+        });
+
+        // Advertise only the resolutions this camera sensor actually supports.
+        std::string supported_resolutions = camera->GetSupportedFrameSizeNames();
+        const bool resolution_supported = !supported_resolutions.empty();
+        if (resolution_supported) {
+            description +=
+                "  `resolution`: Optional capture resolution for this photo. Use a higher value when the task needs fine detail "
+                "(e.g. reading text/labels). Supported values on this device: " +
+                supported_resolutions + ".";
+            std::string current_resolution = camera->GetFrameSizeName();
+            if (!current_resolution.empty()) {
+                description += " Default (when omitted): " + current_resolution + ".";
+            } else {
+                description += " Leave empty to keep the board default.";
+            }
+            description += " Higher resolutions use more RAM and take longer to upload.\n";
+            properties.AddProperty(Property("resolution", kPropertyTypeString, std::string()));
+        }
+
+        description +=
+            "Return:\n"
+            "  A JSON object that provides the photo information.";
+
+        AddTool("self.camera.take_photo", description, properties,
+            [camera, resolution_supported](const PropertyList& properties) -> ReturnValue {
                 // Lower the priority to do the camera capture
                 TaskPriorityReset priority_reset(1);
 
+                if (resolution_supported) {
+                    auto resolution = properties["resolution"].value<std::string>();
+                    if (!resolution.empty() && !camera->SetFrameSize(resolution)) {
+                        throw std::runtime_error("Unsupported or failed camera resolution: " + resolution);
+                    }
+                }
                 if (!camera->Capture()) {
                     throw std::runtime_error("Failed to capture photo");
                 }

scripts/tests/test_build.py

@@ -1092,6 +1092,51 @@ class BoardSourceTests(unittest.TestCase):
         self.assertEqual(missing, [])
 
 
+class CameraResolutionConfigTests(unittest.TestCase):
+    def test_camera_interface_exposes_set_frame_size(self):
+        camera_h = (ROOT / "main/boards/common/camera.h").read_text(encoding="utf-8")
+        self.assertIn("SetFrameSize", camera_h)
+        self.assertIn("GetSupportedFrameSizeNames", camera_h)
+        self.assertIn("GetFrameSizeName", camera_h)
+
+        esp32_camera_h = (ROOT / "main/boards/common/esp32_camera.h").read_text(
+            encoding="utf-8"
+        )
+        self.assertIn("SetFrameSize", esp32_camera_h)
+        self.assertIn("ParseFrameSize", esp32_camera_h)
+        self.assertIn("GetSupportedFrameSizeNames", esp32_camera_h)
+        self.assertIn("GetSensorMaxFrameSize", esp32_camera_h)
+
+        esp32_camera_cc = (ROOT / "main/boards/common/esp32_camera.cc").read_text(
+            encoding="utf-8"
+        )
+        for name in ("QVGA", "VGA", "SVGA", "UXGA", "HD"):
+            self.assertIn(f'"{name}"', esp32_camera_cc)
+        self.assertIn("esp_camera_sensor_get_info", esp32_camera_cc)
+        self.assertIn("kNamedFrameSizes", esp32_camera_cc)
+
+        mcp = (ROOT / "main/mcp_server.cc").read_text(encoding="utf-8")
+        self.assertIn('Property("resolution", kPropertyTypeString', mcp)
+        self.assertIn("GetSupportedFrameSizeNames", mcp)
+        self.assertIn("Supported values on this device", mcp)
+        self.assertIn("SetFrameSize(resolution)", mcp)
+
+    def test_atoms3r_board_default_frame_size_name(self):
+        config_h = (
+            ROOT
+            / "main/boards/m5stack/atoms3r-cam-m12-echo-base/config.h"
+        ).read_text(encoding="utf-8")
+        self.assertIn("CAMERA_FRAME_SIZE_NAME", config_h)
+        self.assertIn('"SVGA"', config_h)
+
+        board_cc = (
+            ROOT
+            / "main/boards/m5stack/atoms3r-cam-m12-echo-base/atoms3r_cam_m12_echo_base.cc"
+        ).read_text(encoding="utf-8")
+        self.assertIn("SetFrameSize(CAMERA_FRAME_SIZE_NAME)", board_cc)
+        self.assertIn('SetFrameSize("VGA")', board_cc)
+
+
 class ZipTests(unittest.TestCase):
     def test_zip_is_always_recreated(self):
         previous_cwd = Path.cwd()