Configurable Flash Write Interval (#2119)

Co-authored-by: Alex <33379584+alexyao2015@users.noreply.github.com>
Co-authored-by: Otto winter <otto@otto-winter.com>

esphome/components/preferences/__init__.py

@@ -0,0 +1,24 @@
+from esphome.const import CONF_ID
+import esphome.codegen as cg
+import esphome.config_validation as cv
+
+CODEOWNERS = ["@esphome/core"]
+
+preferences_ns = cg.esphome_ns.namespace("preferences")
+IntervalSyncer = preferences_ns.class_("IntervalSyncer", cg.Component)
+
+CONF_FLASH_WRITE_INTERVAL = "flash_write_interval"
+CONFIG_SCHEMA = cv.Schema(
+    {
+        cv.GenerateID(): cv.declare_id(IntervalSyncer),
+        cv.Optional(
+            CONF_FLASH_WRITE_INTERVAL, default="60s"
+        ): cv.positive_time_period_milliseconds,
+    }
+).extend(cv.COMPONENT_SCHEMA)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    cg.add(var.set_write_interval(config[CONF_FLASH_WRITE_INTERVAL]))
+    await cg.register_component(var, config)

esphome/components/preferences/syncer.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include "esphome/core/preferences.h"
+#include "esphome/core/component.h"
+
+namespace esphome {
+namespace preferences {
+
+class IntervalSyncer : public Component {
+ public:
+  void set_write_interval(uint32_t write_interval) { write_interval_ = write_interval; }
+  void setup() override {
+    set_interval(write_interval_, []() { global_preferences->sync(); });
+  }
+  void on_shutdown() override { global_preferences->sync(); }
+  float get_setup_priority() const override { return setup_priority::BUS; }
+
+ protected:
+  uint32_t write_interval_;
+};
+
+}  // namespace preferences
+}  // namespace esphome