BLE client support on ESP32 (#1177)

Co-authored-by: Ben Buxton <bb@cactii.net>
Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

esphome/components/ble_client/switch/__init__.py

@@ -0,0 +1,30 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import switch, ble_client
+from esphome.const import CONF_ICON, CONF_ID, CONF_INVERTED, ICON_BLUETOOTH
+from .. import ble_client_ns
+
+BLEClientSwitch = ble_client_ns.class_(
+    "BLEClientSwitch", switch.Switch, cg.Component, ble_client.BLEClientNode
+)
+
+CONFIG_SCHEMA = (
+    switch.SWITCH_SCHEMA.extend(
+        {
+            cv.GenerateID(): cv.declare_id(BLEClientSwitch),
+            cv.Optional(CONF_INVERTED): cv.invalid(
+                "BLE client switches do not support inverted mode!"
+            ),
+            cv.Optional(CONF_ICON, default=ICON_BLUETOOTH): switch.icon,
+        }
+    )
+    .extend(ble_client.BLE_CLIENT_SCHEMA)
+    .extend(cv.COMPONENT_SCHEMA)
+)
+
+
+def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    yield cg.register_component(var, config)
+    yield switch.register_switch(var, config)
+    yield ble_client.register_ble_node(var, config)

esphome/components/ble_client/switch/ble_switch.cpp

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+#include "ble_switch.h"
+#include "esphome/core/log.h"
+#include "esphome/core/application.h"
+
+#ifdef ARDUINO_ARCH_ESP32
+
+namespace esphome {
+namespace ble_client {
+
+static const char *TAG = "ble_switch";
+
+void BLEClientSwitch::write_state(bool state) {
+  this->parent_->set_enabled(state);
+  this->publish_state(state);
+}
+
+void BLEClientSwitch::gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if,
+                                          esp_ble_gattc_cb_param_t *param) {
+  switch (event) {
+    case ESP_GATTC_REG_EVT:
+      this->publish_state(this->parent_->enabled);
+      break;
+    case ESP_GATTC_OPEN_EVT:
+      this->node_state = espbt::ClientState::Established;
+      break;
+    case ESP_GATTC_DISCONNECT_EVT:
+      this->node_state = espbt::ClientState::Idle;
+      this->publish_state(this->parent_->enabled);
+      break;
+    default:
+      break;
+  }
+}
+
+void BLEClientSwitch::dump_config() { LOG_SWITCH("", "BLE Client Switch", this); }
+
+}  // namespace ble_client
+}  // namespace esphome
+#endif

esphome/components/ble_client/switch/ble_switch.h

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+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/ble_client/ble_client.h"
+#include "esphome/components/esp32_ble_tracker/esp32_ble_tracker.h"
+#include "esphome/components/switch/switch.h"
+
+#ifdef ARDUINO_ARCH_ESP32
+#include <esp_gattc_api.h>
+
+namespace esphome {
+namespace ble_client {
+
+namespace espbt = esphome::esp32_ble_tracker;
+
+class BLEClientSwitch : public switch_::Switch, public Component, public BLEClientNode {
+ public:
+  void dump_config() override;
+  void loop() override {}
+  void gattc_event_handler(esp_gattc_cb_event_t event, esp_gatt_if_t gattc_if,
+                           esp_ble_gattc_cb_param_t *param) override;
+  float get_setup_priority() const override { return setup_priority::DATA; }
+
+ protected:
+  void write_state(bool state) override;
+};
+
+}  // namespace ble_client
+}  // namespace esphome
+#endif