feature: add retries to elphapex

pyasic/web/elphapex.py

@@ -120,6 +120,7 @@ class ElphapexWebAPI(BaseWebAPI):
         """
         auth = httpx.DigestAuth(self.username, self.pwd)
 
+        async def _send():
             try:
                 url = f"http://{self.ip}/cgi-bin/{command}.cgi"
                 ret = await client.get(url, auth=auth)
@@ -129,9 +130,18 @@ class ElphapexWebAPI(BaseWebAPI):
                 if ret.status_code == 200:
                     try:
                         json_data = ret.json()
+                        if json_data.get("STATUS", {}).get("STATUS") not in ["S", "I"]:
+                            return None
                         return {command: json_data}
                     except json.decoder.JSONDecodeError:
                         pass
+            return None
+
+        # retry 3 times
+        for i in range(3):
+            res = await _send()
+            if res is not None:
+                return res
         return {command: {}}
 
     async def get_miner_conf(self) -> dict: