How are Embedded Modems Used?
Embedded modems are a critical component of embedded systems. They allow devices to communicate with the internet and other connected devices. They free PCB designers from the burden of constructing an entire embedded cellular modem, allowing them to focus on product-specific details. In this article, we will explore some of the most common use cases for embedded modems and discuss their components. We will also look at how to use embedded modems in advanced applications like the Internet of Things (IoT).
What Are Embedded Modems?
Embedded modems are small hardware devices that provide a connection to the internet. Products like routers, PCs, and industrial equipment have modems integrated into them. Embedded cellular modems are also a component of embedded systems, devices containing a microprocessor and other electronic components. Modems allow devices to communicate with the outside world. Various industries use embedded modems to provide connections for applications.
Key Features of an Embedded Modem
A data pump, a data access arrangement, and a modem code are the essential features that make up an embedded modem.
Data Pump and Data Access Arrangement (DAA)
The data pump is the part of the modem that sends and receives signals. It also
- modulates the carrier signal to encode digital information for transmission
- demodulates the received signal to decode the digital information
- handles the data processing and communication protocol functions
- has compact designs that allow remote features.
The modem modules and packages are high-speed and allow the transfer of data at high rates. Modems can also package data in various ways, allowing you to compress files, encrypt them, or use other methods to secure the data before you send it. The data pump also allows for low-bit-rate channels, which can save on bandwidth costs.
Modems can also package data in various ways, allowing you to:
- compress files,
- encrypt files,
- or use other methods to secure the data before you send it.
The data pump also allows for low-bit-rate channels, which can save on bandwidth costs.
A Data Access Arrangement (DAA) is a key feature of a cellular modem that allows it to connect to a cellular network. It provides isolation between the connected device and the network. The DAA provides the interface between the modem and the antenna and is responsible for routing data traffic between the two.
In addition, the DAA also helps ensure that the modem stays connected to the network even if the signal strength is weak. To do so, you must constantly check the signal strength and switch to a different antenna if necessary. Without a DAA, an integrated modem would not function properly.
Modem Code
Modem code is the software that controls the modem. It is responsible for initializing the modem, handling communication protocols, and managing data transfer. Modem code is written in C or C++. It is often packaged with other software components, such as an operating system, to create a complete modem solution. It packages complete details of functionality into a single chip, enabling high-speed modem operation in a tiny form factor.
The code has many different modem packages available. Some are open source, while others are proprietary. The choice of which package depends on the specific needs of the application.
The Different Applications of Embedded Modems
There are many applications for integrated modems. Various industries use integrated modems, including automotive, vending, and surveillance solutions.
Select Vehicle Systems
One of the most common applications for cellular modems is in automotive systems. Some driver-assist features, such as navigation, infotainment, and safety, use cellular modems. To operate these driver-assist features, cellular modems provide a connection to the internet.
Honda Connect, for example, is an infotainment system that uses modems to connect to the internet. The Honda Connect system provides music streaming and traffic information and requires a data plan to function. Another example is Ford SYNC, a hands-free communication and entertainment system which allows voice commands to control music, navigation, and other connected features.
In addition to driver-assist features, portable modems use integrated modems. Portable modems are devices that provide a connection to the internet while on the go. They use cellular networks to connect and typically have a pay-as-you-go data plan. Portable modems are becoming more popular, as people need internet access while away from home or office.
Vending Machines and Kiosks
Another common application for embedded modems is in vending machines and kiosks. Vending machines and kiosks are self-service machines that dispense products or services. They typically accept payments via credit card, debit card, or cash. Some vending machines and kiosks also provide internet access with the help of an integrated modem.
Vending machines and self-service kiosks are becoming more common as businesses seek ways to provide self-service options. They are often used in place of traditional customer service representatives, saving companies money on labor costs.
Security Products and Surveillance Solutions
Security products and surveillance solutions use embedded modems to monitor and protect people, property, and assets. They typically use a network of cameras and sensors to collect data. Collected data is then transmitted to a central location for monitoring.
Security products and surveillance solutions often use cellular networks to transmit data. Why? Because they need to send data even if the power is out or the internet is down. Embedded high-speed modems are essential for these applications. They offer a compact design and high-speed data transfer.
Invest in a Cellular Modem Your Embedded System Can Rely On
There are many applications for embedded modems across industries, from vending machine businesses to security solutions. If you wish to invest in an embedded modem solution, be sure to invest in one that is high quality and reliable. Look for a modem with a DAA to stay connected even in weak signal areas. Modem code is essential too. Make sure to choose a modem package that is right for your application.
Suppose you are looking for a complete embedded modem solution for your development project. In that case, Novotech has the products and services you need. We offer a wide selection of cellular modems, routers, antennas, modules, and signal boosters. Our team can help you find the right products to meet your needs. Contact us today to learn more about our products and services.