diff --git a/app/src/main/java/com/yinuo/safetywatcher/watcher/port/GasUtilss.kt b/app/src/main/java/com/yinuo/safetywatcher/watcher/port/GasUtilss.kt
index ba066ad..1a05361 100644
--- a/app/src/main/java/com/yinuo/safetywatcher/watcher/port/GasUtilss.kt
+++ b/app/src/main/java/com/yinuo/safetywatcher/watcher/port/GasUtilss.kt
@@ -176,6 +176,9 @@ fun convertData(
     unit: String,
     localGasUnit: String
 ): Float {
+    if (value <= 0f) {
+        return 0f
+    }
     var retValue = value
     // lel需要先转ppm
     if (unit == UNIT_LEL) {
diff --git a/library-push/src/main/java/org/easydarwin/TxtOverlay.kt b/library-push/src/main/java/org/easydarwin/TxtOverlay.kt
index a3a8bf9..af25c25 100644
--- a/library-push/src/main/java/org/easydarwin/TxtOverlay.kt
+++ b/library-push/src/main/java/org/easydarwin/TxtOverlay.kt
@@ -52,8 +52,8 @@ object TxtOverlay {
             // 文字转bitmap
             YUVUtils.generateBitmap(
                 bmp,
-                dateFormat.format(lastTipUpdateTime) + "@" + mToDoShowTip,
-                40,
+                /*dateFormat.format(lastTipUpdateTime) + "@" +*/ mToDoShowTip,
+                45,
                 Color.WHITE
             )
             yuv = YUVUtils.getYUVByBitmap(bmp)