Lifehack Literacy: The Differences Between Zigbee and WiFi

Zigbee and Wi-Fi are two technologies that are similar in terms of their applications, but they actually have many differences. Both are indispensable for supporting short-range communication. One common application is in smart homes.

We’ve already discussed the history of Zigbee, the history of WiFi, and how these technologies have evolved. In practical applications, WiFi is probably more commonly heard of than Zigbee.

Yet both Zigbee and WiFi are equally essential as connectors for smart home technology. So, which one is better? To answer that, we need to understand their differences.

Definition

Before discussing the differences between Zigbee and Wi-Fi, you need to understand a brief definition of both technologies. Understanding each technology will broaden your knowledge and help you grasp its differences.

What is Zigbee?

Zigbee is a wireless technology that uses electromagnetic waves to connect devices. It is similar to Wi-Fi, Bluetooth, and Near Field Communication (NFC).

What sets it apart is that Zigbee uses low frequencies to exchange small amounts of data and/or information between multiple devices. This minimizes energy waste since it uses minimal power.

Zigbee devices do not need to be plugged directly into an electrical outlet. In fact, many can operate on battery power.

What is WiFi?

WiFi is a wireless technology used to connect multiple devices to the internet. This technology is widely used by computers, tablets, smartphones, and other devices.

WiFi radio signals are transmitted from the router to nearby devices. The devices then interpret the signals into usable data. 

Differences Between Zigbee and WiFi

The definitions of Zigbee and WiFi naturally highlight several differences between the two. The most notable differences lie in the frequency bands and data rates. Additionally, there are differences in range, power consumption, network topology, and data security.

1. Frequency bands

Zigbee and WiFi use different radio frequency bands. Zigbee uses frequencies of 2.4 GHz or lower. Meanwhile, Wi-Fi typically uses frequencies up to 60 GHz. In fact, the latest Wi-Fi 7 uses a frequency of 7 GHz.

2. Data rate

The use of different frequencies results in different data transmission speeds for both. Zigbee has a data transmission rate of only 250 Kbps. Wi-Fi has speeds of up to 100 Mbps. The latest versions can even reach speeds of up to 9.6 Gbps.

3. Range

In terms of range, both have their own limitations. While Wi-Fi theoretically has a wider range—reaching up to 50 meters indoors and 100 meters outdoors—its use within a home can also hinder data transmission.

Meanwhile, Zigbee offers a range of 10–100 meters for smart home networks and sensors. The range of both technologies is also significantly influenced by environmental factors, output power, and antenna gain.

4. Power consumption

Zigbee, which uses low frequencies and low power, also consumes very little power. Meanwhile, Wi-Fi, which requires high bandwidth, has higher power consumption. However, WiFi power consumption has been optimized for Internet of Things (IoT) applications.

5. Network topology

Zigbee and WiFi have completely different network topologies. Zigbee uses a network topology called Mesh. Meanwhile, WiFi uses a network topology called Star.

To enable data transmission, a mesh network topology requires routers and repeaters. Meanwhile, a star network topology only requires a router.

6. Data security

In terms of security, Zigbee offers a higher level of security. This is due to its lower data transmission speed and the fact that data is transferred over short distances, which reduces signal interference.

WiFi, on the other hand, faces a higher risk of interference. This is because it uses a wider range of radio frequencies and operates at higher speeds, making it more vulnerable to hacking.

Which Is Better for a Smart Home?

Whether to use Zigbee or Wi-Fi for a smart home depends on your devices and needs. However, Zigbee is generally preferred for smart homes.

This is due to its low power consumption. Moreover, many smart home devices run on batteries. But that doesn’t mean WiFi isn’t used at all. 

Within the smart home ecosystem, WiFi is still used for entertainment needs and devices that require a direct power supply. Devices such as Smart TVs, Smart Computers, Phones, and Tablets will need WiFi to connect. 

Given that many smart home devices use wireless technology, Zigbee may have the edge. Wi-Fi is more in demand for people’s need to connect to the internet more broadly, rather than just connecting one device to another within a single ecosystem.