alexey.zholtikov/zh_dht
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Alexey Zholtikov
2024-06-23 08:09:00 +03:00
parent daf75ec9d6
commit 24d1085947
2 changed files with 12 additions and 16 deletions
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2
README.md
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@ -76,8 +76,8 @@ void app_main(void)
};
i2c_master_bus_handle_t i2c_bus_handle;
i2c_new_master_bus(&i2c_bus_config, &i2c_bus_handle);
zh_dht_init_config_t dht_init_config = ZH_DHT_INIT_CONFIG_DEFAULT();
#endif
zh_dht_init_config_t dht_init_config = ZH_DHT_INIT_CONFIG_DEFAULT();
#ifdef CONFIG_IDF_TARGET_ESP8266
dht_init_config.i2c_port = I2C_PORT;
#else

26
zh_dht.c
View File

@ -65,8 +65,8 @@ esp_err_t zh_dht_init(const zh_dht_init_config_t *config)
ESP_LOGE(TAG, "DHT initialization fail. Sensor not connected or not responded.");
return ESP_ERR_NOT_FOUND;
}
ESP_LOGI(TAG, "DHT initialization success. I2C connection.");
#endif
ESP_LOGI(TAG, "DHT initialization success. I2C connection.");
}
_is_initialized = true;
return ESP_OK;
@ -169,12 +169,10 @@ esp_err_t zh_dht_read(float *humidity, float *temperature)
esp_err_t esp_err = ESP_OK;
uint8_t dht_data[I2C_DATA_SIZE] = {0};
uint8_t read_command[] = {I2C_DATA_READ_COMMAND};
uint8_t wakeup_command = {0};
#ifdef CONFIG_IDF_TARGET_ESP8266
i2c_cmd_handle_t i2c_cmd_handle = i2c_cmd_link_create();
i2c_master_start(i2c_cmd_handle);
i2c_master_write_byte(i2c_cmd_handle, I2C_ADDRESS << 1 | I2C_MASTER_WRITE, true);
i2c_master_write_byte(i2c_cmd_handle, wakeup_command, true);
i2c_master_write_byte(i2c_cmd_handle, I2C_ADDRESS << 1 | I2C_MASTER_WRITE, false);
i2c_master_stop(i2c_cmd_handle);
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
i2c_cmd_link_delete(i2c_cmd_handle);
@ -186,13 +184,15 @@ esp_err_t zh_dht_read(float *humidity, float *temperature)
i2c_cmd_handle = i2c_cmd_link_create();
i2c_master_start(i2c_cmd_handle);
i2c_master_write_byte(i2c_cmd_handle, I2C_ADDRESS << 1 | I2C_MASTER_WRITE, true);
i2c_master_write_byte(i2c_cmd_handle, read_command[0], true);
i2c_master_write_byte(i2c_cmd_handle, read_command[1], true);
i2c_master_write_byte(i2c_cmd_handle, read_command[2], true);
for (uint8_t i = 0; i < sizeof(read_command); ++i)
{
i2c_master_write_byte(i2c_cmd_handle, read_command[i], true);
}
i2c_master_stop(i2c_cmd_handle);
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
i2c_cmd_link_delete(i2c_cmd_handle);
#else
uint8_t wakeup_command = {0};
esp_err = i2c_master_transmit(_dht_handle, &wakeup_command, sizeof(wakeup_command), 1000 / portTICK_PERIOD_MS);
if (esp_err != ESP_OK)
{
@ -210,14 +210,10 @@ esp_err_t zh_dht_read(float *humidity, float *temperature)
i2c_cmd_handle = i2c_cmd_link_create();
i2c_master_start(i2c_cmd_handle);
i2c_master_write_byte(i2c_cmd_handle, I2C_ADDRESS << 1 | I2C_MASTER_READ, true);
i2c_master_read_byte(i2c_cmd_handle, &dht_data[0], I2C_MASTER_ACK);
i2c_master_read_byte(i2c_cmd_handle, &dht_data[1], I2C_MASTER_ACK);
i2c_master_read_byte(i2c_cmd_handle, &dht_data[2], I2C_MASTER_ACK);
i2c_master_read_byte(i2c_cmd_handle, &dht_data[3], I2C_MASTER_ACK);
i2c_master_read_byte(i2c_cmd_handle, &dht_data[4], I2C_MASTER_ACK);
i2c_master_read_byte(i2c_cmd_handle, &dht_data[5], I2C_MASTER_ACK);
i2c_master_read_byte(i2c_cmd_handle, &dht_data[6], I2C_MASTER_ACK);
i2c_master_read_byte(i2c_cmd_handle, &dht_data[7], I2C_MASTER_NACK);
for (uint8_t i = 0; i < sizeof(dht_data); ++i)
{
i2c_master_read_byte(i2c_cmd_handle, &dht_data[i], i == (sizeof(dht_data) - 1) ? I2C_MASTER_NACK : I2C_MASTER_ACK);
}
i2c_master_stop(i2c_cmd_handle);
esp_err = i2c_master_cmd_begin(_init_config.i2c_port, i2c_cmd_handle, 1000 / portTICK_PERIOD_MS);
i2c_cmd_link_delete(i2c_cmd_handle);