From cbe3526ea76832f2269c6d7458ea96f62434d836 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Robert=20J=C3=B6rdens?= <rj@quartiq.de>
Date: Mon, 12 Nov 2018 18:28:06 +0100
Subject: [PATCH] shutter: ping

---
 ptb/shutter_protocol.py | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/ptb/shutter_protocol.py b/ptb/shutter_protocol.py
index ab34b4c..6f3ead0 100644
--- a/ptb/shutter_protocol.py
+++ b/ptb/shutter_protocol.py
@@ -29,6 +29,16 @@ async def version(self):
         """
         return (await self.ask(b"v")).strip()
 
+    async def ping(self):
+        try:
+            await self.version()
+        except asyncio.CancelledError:
+            raise
+        except:
+            logger.warning("ping failed", exc_info=True)
+            return False
+        return True
+
     async def status(self):
         """Return the error flags on all channels.