Use DISABLE_ASYNCTCP_ACK_TIMEOUTS to fix client disconnects (depends on not yet accepted pull request: https://github.com/esphome/esphome/pull/1712).

__init__.py

@@ -123,5 +123,8 @@ def to_code(config):
     # the AUTO_LOAD feature unfortunately.
     CORE.config["output"].append({ CONF_PLATFORM: "gpio" })
 
+    # A work-around for API disconnects.
+    cg.add_define("DISABLE_ASYNCTCP_ACK_TIMEOUTS")
+
     yield make_light_hal(config)
     yield make_front_panel_hal(config)