How to Configure the AD7028D Serial Device Server in HTTPD Client Mode


In this guide, we will walk you through the process of setting up the AD7028D Serial Device Server in HTTPD Client mode. This versatile device, available for purchase at Alotcer’s website, allows you to effortlessly transmit data between serial port devices and HTTP servers. Whether you’re a first-time user or looking to optimize your Alotcer experience, this article has you covered.

Understanding the Product Model

  • Product Model: AD7028D Serial Device Server/RS485 Serial to Ethernet Converter

Getting Started with AD7028D If you’re new to the AD7028D or Alotcer devices in general, let’s begin by understanding the basics.

Checking Firmware Version Before diving into the configuration process, it’s essential to know your device’s firmware version. You can easily retrieve this information using the AT command AT+VER or by accessing the settings webpage.

Connecting and Configuring AD7028D Configuring the AD7028D in HTTPD Client mode is straightforward. Here’s a step-by-step guide:

Step 1: Accessing the Device

  1. Connect to your AD7028D device in HTTPS Client mode.
  2. Specify the Local URL as 80.

Step 2: HTTPD Configuration

  1. Choose ‘GET’ as your preferred HTTPS method.
  2. Set the HTTPS URL to ‘/1.php?’ (ensure it’s less than 100 bytes).

Accessing Device Data Now that your device is configured, you may want to access data from the server. However, if you encounter a “404 – File Not Found” error, follow these troubleshooting steps:

Troubleshooting: “404 – File Not Found” Error

  1. Double-check the correctness of the HTTPS URL you’ve specified.
  2. Verify that the file you’re trying to access exists on the server.

Understanding HTTPD Client Mode

HTTPD Client mode enables seamless data transmission between your serial port device and the HTTP server. Here’s why it’s beneficial:

Benefits of HTTPD Client Mode

  1. Hassle-free data transmission: No need to worry about the HTTP data format; AD7028D handles it for you.
  2. Effortless configuration: Set up your device with ease, thanks to user-friendly parameters.


In conclusion, configuring the AD7028D Serial Device Server in HTTPD Client mode is a straightforward process. Whether you’re a novice or an experienced Alotcer user, following these steps will ensure smooth data transmission between your serial port device and HTTP server. Troubleshooting any issues, such as the “404 – File Not Found” error, is also simplified with our guide. Enjoy the benefits of HTTPD Client mode and unlock the full potential of your AD7028D device.