Anova ble component (#1752)

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

esphome/components/anova/anova_base.h

@@ -0,0 +1,79 @@
+#pragma once
+
+#include "esphome/core/helpers.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace anova {
+
+enum CurrentQuery {
+  NONE,
+  READ_DEVICE_STATUS,
+  READ_TARGET_TEMPERATURE,
+  READ_CURRENT_TEMPERATURE,
+  READ_DATA,
+  READ_UNIT,
+  SET_TARGET_TEMPERATURE,
+  SET_UNIT,
+  START,
+  STOP,
+};
+
+struct AnovaPacket {
+  uint16_t length;
+  uint8_t data[24];
+};
+
+#define CMD_READ_DEVICE_STATUS "status\r"
+#define CMD_READ_TARGET_TEMP "read set temp\r"
+#define CMD_READ_CURRENT_TEMP "read temp\r"
+#define CMD_READ_UNIT "read unit\r"
+#define CMD_READ_DATA "read data\r"
+#define CMD_SET_TARGET_TEMP "set temp %.1f\r"
+#define CMD_SET_TEMP_UNIT "set unit %c\r"
+
+#define CMD_START "start\r"
+#define CMD_STOP "stop\r"
+
+class AnovaCodec {
+ public:
+  AnovaPacket *get_read_device_status_request();
+  AnovaPacket *get_read_target_temp_request();
+  AnovaPacket *get_read_current_temp_request();
+  AnovaPacket *get_read_data_request();
+  AnovaPacket *get_read_unit_request();
+
+  AnovaPacket *get_set_target_temp_request(float temperature);
+  AnovaPacket *get_set_unit_request(char unit);
+
+  AnovaPacket *get_start_request();
+  AnovaPacket *get_stop_request();
+
+  void decode(const uint8_t *data, uint16_t length);
+  bool has_target_temp() { return this->has_target_temp_; }
+  bool has_current_temp() { return this->has_current_temp_; }
+  bool has_unit() { return this->has_unit_; }
+  bool has_running() { return this->has_running_; }
+
+  union {
+    float target_temp_;
+    float current_temp_;
+    char unit_;
+    bool running_;
+  };
+
+ protected:
+  AnovaPacket *clean_packet_();
+  AnovaPacket packet_;
+
+  bool has_target_temp_;
+  bool has_current_temp_;
+  bool has_unit_;
+  bool has_running_;
+  char buf_[32];
+
+  CurrentQuery current_query_;
+};
+
+}  // namespace anova
+}  // namespace esphome