Protect async_setup_entry loop with a try/catch for each instance, ot…

…herwise compounded chance of failure is very high (fixes #175)

custom_components/echonetlite/__init__.py

@@ -311,10 +311,22 @@ def unload_config_entry():
 
  echonetlite = ECHONETConnector(instance, hass, entry)
  try:
- await echonetlite.async_update()
- hass.data[DOMAIN][entry.entry_id].append(
- {"instance": instance, "echonetlite": echonetlite}
- )
+ # Since there is a small chance of failure, perform a few retry for each instance
+ # (otherwise, assuming 50 instances and 1% failure rate, setup would suceed in (1-0.01)^50 = 60% cases only)
+ for retry in range(1, 4):
+ try:
+ await echonetlite.async_update()
+ hass.data[DOMAIN][entry.entry_id].append(
+ {"instance": instance, "echonetlite": echonetlite}
+ )
+ break
+ except TimeoutError as ex:
+ _LOGGER.debug(
+ f"Setting up ECHONET Instance host {host} timed out. Retry {retry} of 3"
+ )
+ # if multiple error in a row, forward exception to outer loop
+ if retry == 3:
+ raise
  except (TimeoutError, asyncio.CancelledError) as ex:
  _LOGGER.debug(f"Connection error while connecting to {host}: {ex}")
  raise ConfigEntryNotReady(