Temperature and humidity measurements are a nice addition to many hobby projects. But [Rajendra Bhatt] makes the point that many of these sensors have a price tag that is well above what most hobbi… ...

The add-on board features a DHT11 temperature and humidity sensor, LM35D temperature sensor, rotary potentiometer, and photoresistor. It also hosts an IR receiver, piezo buzzer, RGB/blue/red LEDs, ...

Thus, the car adds a DHT11 temperature and humidity sensor, along with a BMP280 air pressure sensor using the Grove connectors.