tuya.h

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#pragma once

#include "esphome/core/component.h"
#include "esphome/components/uart/uart.h"

namespace esphome {
namespace tuya {

enum class TuyaDatapointType : uint8_t {
 RAW = 0x00, // variable length
 BOOLEAN = 0x01, // 1 byte (0/1)
 INTEGER = 0x02, // 4 byte
 STRING = 0x03, // variable length
 ENUM = 0x04, // 1 byte
 BITMASK = 0x05, // 2 bytes
};

struct TuyaDatapoint {
 uint8_t id;
 TuyaDatapointType type;
 union {
 bool value_bool;
 int value_int;
 uint32_t value_uint;
 uint8_t value_enum;
 uint16_t value_bitmask;
 };
};

struct TuyaDatapointListener {
 uint8_t datapoint_id;
 std::function<void(TuyaDatapoint)> on_datapoint;
};

enum class TuyaCommandType : uint8_t {
 HEARTBEAT = 0x00,
 PRODUCT_QUERY = 0x01,
 CONF_QUERY = 0x02,
 WIFI_STATE = 0x03,
 WIFI_RESET = 0x04,
 WIFI_SELECT = 0x05,
 DATAPOINT_DELIVER = 0x06,
 DATAPOINT_REPORT = 0x07,
 DATAPOINT_QUERY = 0x08,
 WIFI_TEST = 0x0E,
};

enum class TuyaInitState : uint8_t {
 INIT_HEARTBEAT = 0x00,
 INIT_PRODUCT,
 INIT_CONF,
 INIT_WIFI,
 INIT_DATAPOINT,
 INIT_DONE,
};

class Tuya : public Component, public uart::UARTDevice {
 public:
 float get_setup_priority() const override { return setup_priority::LATE; }
 void setup() override;
 void loop() override;
 void dump_config() override;
 void register_listener(uint8_t datapoint_id, const std::function<void(TuyaDatapoint)> &func);
 void set_datapoint_value(TuyaDatapoint datapoint);

 protected:
 void handle_char_(uint8_t c);
 void handle_datapoint_(const uint8_t *buffer, size_t len);
 bool validate_message_();

 void handle_command_(uint8_t command, uint8_t version, const uint8_t *buffer, size_t len);
 void send_command_(TuyaCommandType command, const uint8_t *buffer, uint16_t len);
 void send_empty_command_(TuyaCommandType command) { this->send_command_(command, nullptr, 0); }

 TuyaInitState init_state_ = TuyaInitState::INIT_HEARTBEAT;
 int gpio_status_ = -1;
 int gpio_reset_ = -1;
 std::string product_ = "";
 std::vector<TuyaDatapointListener> listeners_;
 std::vector<TuyaDatapoint> datapoints_;
 std::vector<uint8_t> rx_message_;
};

} // namespace tuya
} // namespace esphome