ESP8266 Module 4 Quiz | OceanRemote Education

1 What is required for ADC input on ESP8266?

A) Voltage divider to reduce to 0-1V B) Direct connection to 3.3V C) Pull-up resistor D) Pull-down resistor

2 Which sensor measures temperature AND humidity?

A) DS18B20 B) Soil moisture C) DHT22 D) BMP280

3 What is the typical total cost of a solar-powered sensor station?

A) $100+ B) $35-40 C) $10 D) $200

4 How long can a properly configured sensor station run on batteries?

A) Few hours B) 3 days C) 2 weeks D) Months

5 What value range should you calibrate for soil moisture?

A) 0-100% B) 0-255 C) Dry value and wet value D) Temperature only

6 Which WiFi frequency does ESP8266 use?

A) 2.4GHz only B) 5GHz only C) Both D) 6GHz

7 What is the benefit of capacitive soil moisture sensors?

A) Don't corrode over time B) Cheaper price C) Higher accuracy D) Digital output