diff --git a/armor/src/armor_finder/send_target/send_target.cpp b/armor/src/armor_finder/send_target/send_target.cpp
index 070f196..f0b8e6f 100644
--- a/armor/src/armor_finder/send_target/send_target.cpp
+++ b/armor/src/armor_finder/send_target/send_target.cpp
@@ -42,7 +42,7 @@ static bool sendTarget(Serial &serial, double yaw, uint16_t shoot_delay, bool fi
     // Vofa串口验证 不用可以注释掉
     char buff[128];
     int len = sprintf(buff,"channels: %f, %f, %d\n", yaw, shoot_delay, fire);
-    return serial.WriteData(buff, len);
+    return serial.WriteData((unsigned char *)buff, len);
 }
 
 bool ArmorFinder::sendAntiTopTarget(double yaw, uint16_t shoot_delay, bool fire) {