diff --git a/server/robotserver/coroutine.cc b/server/robotserver/coroutine.cc
index fc405f42..d9bc59c2 100644
--- a/server/robotserver/coroutine.cc
+++ b/server/robotserver/coroutine.cc
@@ -2,8 +2,11 @@
 
 #include <iostream>
 
+#include <f8/timer.h>
+
 #include "coroutine.h"
 #include "comgr.h"
+#include "app.h"
 
 void Awaiter::Await(std::shared_ptr<Awaiter> notifyer)
 {
@@ -122,3 +125,17 @@ void Coroutine::DoResume()
 {
     CoResume();
 }
+
+void TimerPromise::DoAwait()
+{
+    std::shared_ptr<TimerPromise> self = std::static_pointer_cast<TimerPromise>(Awaiter::shared_from_this());
+    f8::Timer::Instance()->SetTimeout
+        (
+         time_,
+         [self] (int event, const a8::Args* args) mutable
+         {
+             if (event == a8::TIMER_EXEC_EVENT) {
+
+             }
+         });
+}
diff --git a/server/robotserver/coroutine.h b/server/robotserver/coroutine.h
index 6455199a..6cc9dc2e 100644
--- a/server/robotserver/coroutine.h
+++ b/server/robotserver/coroutine.h
@@ -45,7 +45,7 @@ protected:
     friend class Coroutine;
 };
 
-class Promise : public Awaiter
+class Promise : public Awaiter, public std::enable_shared_from_this<Promise>
 {
 protected:
 
@@ -53,6 +53,21 @@ protected:
 
 };
 
+class TimerPromise : public Promise, public std::enable_shared_from_this<TimerPromise>
+{
+ public:
+
+    TimerPromise(long long time) { time_ = time; };
+
+protected:
+
+    virtual void DoAwait() override;
+
+ private:
+    long long time_ = 0;
+
+};
+
 class Coroutine : public Awaiter
 {
  public: