{"id":87441,"date":"2019-07-26T11:28:12","date_gmt":"2019-07-26T11:28:12","guid":{"rendered":"https:\/\/randomnerdtutorials.com\/?p=87441"},"modified":"2019-07-26T11:28:17","modified_gmt":"2019-07-26T11:28:17","slug":"dht11-vs-dht22-vs-lm35-vs-ds18b20-vs-bme280-vs-bmp180","status":"publish","type":"post","link":"https:\/\/randomnerdtutorials.com\/dht11-vs-dht22-vs-lm35-vs-ds18b20-vs-bme280-vs-bmp180\/","title":{"rendered":"DHT11 vs DHT22 vs LM35 vs DS18B20 vs BME280 vs BMP180"},"content":{"rendered":"\n

There are a wide variety of temperature sensors compatible with Arduino, ESP32, ESP8266 and other development boards. So, it can be difficult to to pick up the most suitable sensor for your project. In this article, we’ll compare 6 widely used temperature sensors: DHT11, DHT22, LM35, DS18B20, BME280 and BMP180. <\/p>\n\n\n\n

\"DHT11<\/figure><\/div>\n\n\n\n

We’ll compare the sensors when it comes to communication protocol, temperature range, accuracy, ease of use and much more. <\/p>\n\n\n\n

We also run a simple experiment in which we measured the temperature in the same environment using all temperature sensors over time. With this experiment we could see how the sensors react to temperature changes. We’ve ran this experiment for approximately 36 hours and we’ll show you the results later in this article.<\/p>\n\n\n\n

Recommended reading:<\/strong> 9 Arduino Compatible Temperature Sensors for Your Electronics Projects<\/a><\/p>\n\n\n\n

Comparing Temperature Sensors: DHT11 vs DHT22 vs LM35 vs DS18B20 vs BME280 vs BMP180<\/h2>\n\n\n\n

For a quick comparison of the sensors, we’ve put together the following table that shows the most important information when it comes to select a temperature sensor namely: communication protocol, supply voltage, temperature range and accuracy.<\/p>\n\n\n\n

Note:<\/strong> the table scrolls horizontally both on desktop computer, tablet and mobile.<\/p>\n\n\n\n
<\/td>
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Sensor<\/strong><\/td>DHT11<\/strong><\/td>DHT22 (AM2302)<\/strong><\/td>LM35<\/strong><\/td>DS18B20<\/strong><\/td>BME280<\/strong><\/td>BMP180<\/strong><\/td><\/tr>
Measures<\/strong><\/td>Temperature
Humidity<\/td>		Temperature
Humidity <\/td>		Temperature<\/td>Temperature<\/td>Temperature
Humidity
Pressure<\/td>		Temperature
Pressure<\/td><\/tr>
Communication
protocol<\/strong><\/td>		One-wire <\/td>One-wire <\/td>Analog<\/td>One-wire<\/td>I2C
SPI<\/td>		I2C<\/td><\/tr>
Supply
voltage<\/strong><\/td>		3 to 5.5V DC<\/td>3 to 6V DC<\/td>4 to 30 V DC<\/td>3 to 5.5V DC<\/td>1.7 to 3.6V (for the chip) 3.3 to 5V for the board<\/td>1.8 to 3.6V (for the chip) 3.3 to 5V for the board<\/td><\/tr>
Temperature
range<\/strong><\/td>		0 to 50\u00baC<\/td>-40 to 80\u00baC<\/td>-55 to 150\u00baC<\/td>-55 to 125\u00baC<\/td>-40 to 85\u00baC<\/td>0 to 65\u00baC<\/td><\/tr>
Accuracy<\/strong><\/td>+\/- 2\u00baC (at 0 to 50\u00baC)<\/td>+\/- 0.5\u00baC (at -40 to 80\u00baC)<\/td>+\/-0.5\u00baC (at 25\u00baC)<\/td>+\/-0.5\u00baC (at -10 to 85\u00baC)<\/td>+\/-0.5\u00baC (at 25\u00baC)<\/td>+\/-0.5\u00baC (at 25\u00baC)<\/td><\/tr>
Support
(Arduino IDE)<\/strong><\/td>		Adafruit DHT Library
<\/a>
Adafruit Unified Sensor Library<\/a> <\/td>		Adafruit DHT Library
<\/a>
Adafruit Unified Sensor Library<\/a> <\/td>		analogRead()<\/td>DallasTemperature<\/a>

OneWire<\/a> <\/td>		Adafruit BME280 library
<\/a>
Adafruit Unified Sensor Library<\/a> <\/td>		Adafruit BME085
<\/a>
Adafruit Unified Sensor Library<\/a> <\/td><\/tr>
Support
(MicroPython)<\/strong> <\/td>		dht <\/strong>module (included in MicroPython firmware)<\/td>dht <\/strong>module (included in MicroPython firmware) <\/td>from machine import ADC
ADC().read<\/td>		ds18b20 <\/strong>module (included in MicroPython firmware)<\/td>BME280 Adafruit Library<\/a><\/td>BMP180 module<\/a><\/td><\/tr>
Where to buy?<\/strong><\/td>Check prices<\/a><\/td>Check prices <\/a><\/td>Check prices <\/a><\/td>Check prices<\/a>
Check prices (waterproof)<\/a><\/td>		Check prices <\/a><\/td>Check prices<\/a> <\/td><\/tr><\/tbody><\/table>\n\n\n\n

DHT11 vs DHT22 (AM2302)<\/h2>\n\n\n\n
\"DHT11<\/figure><\/div>\n\n\n\n

The DHT11<\/a> and DHT22 (AM2302)<\/a> are digital temperature sensors that measure temperature and humidity. They look very similar and work the same way, but have different specs. <\/p>\n\n\n\n

Both sensors can be powered either with 3.3V or 5V. So, you can easily use them in your Arduino or ESP projects.<\/p>\n\n\n\n

The DHT22 sensor has a better resolution and a wider temperature and humidity measurement range. However, it’s a bit more expensive and you can only request readings with 2 seconds interval.<\/p>\n\n\n\n

The DHT11 is slightly cheaper, it has a smaller range, and it\u2019s less accurate. But you can get sensor readings every second.<\/p>\n\n\n\n

Despite their differences, they work in a similar way, and you can use the same code to read temperature and humidity. You just need to select in the code the sensor type you\u2019re using.<\/p>\n\n\n\n

So, if you’re willing to spend an extra dollar, we recommend the DHT22<\/a> over the DHT11.<\/p>\n\n\n\n

We have several guides on how to use the DHT11 and DHT22 sensors:<\/p>\n\n\n\n