Code Module 1 Quiz | OceanRemote Education

1 What pin does soil moisture sensor connect to on ESP32?

A) GPIO16 B) GPIO32 (ADC) C) GPIO4 D) GPIO21

2 What resistor value is needed for DHT22 data pin?

A) 1kΩ B) 4.7kΩ C) 10kΩ D) 100kΩ

3 What library is needed for DS18B20?

A) OneWire.h and DallasTemperature.h B) DHT.h C) WiFi.h D) HTTPClient.h

4 What is the typical dry value for soil moisture sensor?

A) 1000 B) 1500 C) 2000 D) 3800

5 What does DHT22 measure?

A) Temperature only B) Humidity only C) Both temperature and humidity D) Soil moisture

6 What pin does DS18B20 use?

A) Any ADC pin B) Any digital pin with pull-up C) I2C only D) SPI only

7 What is the accuracy of DS18B20?

A) ±1°C B) ±0.5°C C) ±2°C D) ±5°C