fix：

main.py

@@ -290,34 +290,33 @@ def cmd_str():
     last_avg_abs = 0
 
     def _flush_pressure_buf(reason: str):
-        if not config.AIR_PRESSURE_lOG:
-            return
         nonlocal pressure_buf, pressure_sum, pressure_min, pressure_max, pressure_t0_ms, logger, pressure_abs_sum, last_avg_abs
         if not pressure_buf:
             return
-        t1_ms = time.ticks_ms()
-        n = len(pressure_buf)
-        avg = (pressure_sum / n) if n else 0
-        avg_abs = (pressure_abs_sum / n) if n else 0
-        # 一行输出：方便后处理画曲线；同时带上统计信息便于快速看波峰
-        line = (
-            f"[气压批量] reason={reason} "
-            f"t0={pressure_t0_ms} t1={t1_ms} n={n} "
-            f"min={pressure_min} max={pressure_max} avg={avg:.1f} avg_abs={avg_abs:.3f} "
-            f"values={','.join(map(str, pressure_buf))}"
-            f" convert value (kpa): {(max(pressure_buf, key=lambda x: x[1])[1] - last_avg_abs) / (5 - 2.5) * config.AIR_PRESSURE_HARDWARE_MAX:.1f}"
-        )
-        if logger:
-            logger.debug(line)
-        else:
-            print(line)
+        if config.AIR_PRESSURE_lOG:
+            t1_ms = time.ticks_ms()
+            n = len(pressure_buf)
+            avg = (pressure_sum / n) if n else 0
+            avg_abs = (pressure_abs_sum / n) if n else 0
+            line = (
+                f"[气压批量] reason={reason} "
+                f"t0={pressure_t0_ms} t1={t1_ms} n={n} "
+                f"min={pressure_min} max={pressure_max} avg={avg:.1f} avg_abs={avg_abs:.3f} "
+                f"values={','.join(map(str, pressure_buf))}"
+                f" convert value (kpa): {(max(pressure_buf, key=lambda x: x[1])[1] - last_avg_abs) / (5 - 2.5) * config.AIR_PRESSURE_HARDWARE_MAX:.1f}"
+            )
+            if logger:
+                logger.debug(line)
+            else:
+                print(line)
+            last_avg_abs = avg_abs
+        # 无论是否记录日志，都必须清空 buffer，否则内存泄漏
         pressure_buf = []
         pressure_sum = 0
         pressure_abs_sum = 0
         pressure_min = 4095
         pressure_max = 0
         pressure_t0_ms = None
-        last_avg_abs = avg_abs
 
     # 主循环：检测扳机触发 → 拍照 → 分析 → 上报
     while not app.need_exit():