xiaomi_lywsd03mmc.cpp

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#include "xiaomi_lywsd03mmc.h"
#include "esphome/core/helpers.h"
#include "esphome/core/log.h"
 
#ifdef USE_ESP32
 
namespace esphome {
namespace xiaomi_lywsd03mmc {
 
static const char *const TAG = "xiaomi_lywsd03mmc";
 
static constexpr size_t LYWSD03MMC_BINDKEY_SIZE = 16;
 
void XiaomiLYWSD03MMC::dump_config() {
  char bindkey_hex[format_hex_pretty_size(LYWSD03MMC_BINDKEY_SIZE)];
  ESP_LOGCONFIG(TAG,
                "Xiaomi LYWSD03MMC\n"
                "  Bindkey: %s",
                format_hex_pretty_to(bindkey_hex, this->bindkey_, LYWSD03MMC_BINDKEY_SIZE, '.'));
  LOG_SENSOR("  ", "Temperature", this->temperature_);
  LOG_SENSOR("  ", "Humidity", this->humidity_);
  LOG_SENSOR("  ", "Battery Level", this->battery_level_);
}
 
bool XiaomiLYWSD03MMC::parse_device(const esp32_ble_tracker::ESPBTDevice &device) {
  if (device.address_uint64() != this->address_) {
    ESP_LOGVV(TAG, "parse_device(): unknown MAC address.");
    return false;
  }
  ESP_LOGVV(TAG, "parse_device(): MAC address %s found.", device.address_str().c_str());
 
  bool success = false;
  for (auto &service_data : device.get_service_datas()) {
    auto res = xiaomi_ble::parse_xiaomi_header(service_data);
    if (!res.has_value()) {
      continue;
    }
    if (res->is_duplicate) {
      continue;
    }
    if (res->has_encryption &&
        (!(xiaomi_ble::decrypt_xiaomi_payload(const_cast<std::vector<uint8_t> &>(service_data.data), this->bindkey_,
                                              this->address_)))) {
      continue;
    }
    if (!(xiaomi_ble::parse_xiaomi_message(service_data.data, *res))) {
      continue;
    }
    if (res->humidity.has_value() && this->humidity_ != nullptr) {
      // see https://github.com/custom-components/sensor.mitemp_bt/issues/7#issuecomment-595948254
      *res->humidity = trunc(*res->humidity);
    }
    if (!(xiaomi_ble::report_xiaomi_results(res, device.address_str()))) {
      continue;
    }
    if (res->temperature.has_value() && this->temperature_ != nullptr)
      this->temperature_->publish_state(*res->temperature);
    if (res->humidity.has_value() && this->humidity_ != nullptr)
      this->humidity_->publish_state(*res->humidity);
    if (res->battery_level.has_value() && this->battery_level_ != nullptr)
      this->battery_level_->publish_state(*res->battery_level);
    success = true;
  }
 
  return success;
}
 
void XiaomiLYWSD03MMC::set_bindkey(const std::string &bindkey) {
  memset(bindkey_, 0, 16);
  if (bindkey.size() != 32) {
    return;
  }
  char temp[3] = {0};
  for (int i = 0; i < 16; i++) {
    strncpy(temp, &(bindkey.c_str()[i * 2]), 2);
    bindkey_[i] = std::strtoul(temp, nullptr, 16);
  }
}
 
}  // namespace xiaomi_lywsd03mmc
}  // namespace esphome
 
#endif