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How to NTP Client Example

This code is an NTP client example that uses a STM32 Nucleo-144 board and W5300 TOE Shield. the NTP protocol to connect to an NTP server and retrieve the current time and date.

Step 1: Prepare software

The following serial terminal programs are required for NTPClient example test, download and install from below links.

• Tera Term

Step 2: Prepare hardware

Combine W5300-TOE Shield with STM32 Nucleo-144 board.

Connect ethernet cable to W5300 TOE Shield ethernet port.

Connect STM32 Nucleo-144 board to desktop or laptop using 5 pin micro USB cable.

Step 3: Setup NTPClient Example

* Please refer to the following [Getting Start] page for instructions on configuring the Arduino IDE

https://github.com/Wiznet/W5300-TOE-Arduino/blob/main/Static/documents/getting_started.md 

To test the NTPClient example, minor settings shall be done in code.

1. Setup network configuration.

Setup network configuration such as IP in 'NTPClient.ino' in 'Ethernet/examples/NTPClient' directory.

byte mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED};
IPAddress ip(192, 168, 11, 111);

To set the NTP Time server.

#define TIME_SERVER   "time.nist.gov"

Step 4: Build and Download

After completing the NTPClient example configuration, build in the IDE you are using.

Download the time lib library for Arduino

[Sketch] -> [Include Library] -> [Manage Libraries] -> install timelib

1. When the build is completed, download the firmware to the STM32 Nucleo-144 board.

Step 5: Run

1. Connect to the serial COM port of STM32 Nucleo-144 board with Tera Term.

2. If the NTPClient example works normally on STM32 Nucleo-144 board, you can see the network information of STM32 Nucleo-144 board.

3. Connect to the NTP Server. and prints the NTP time every 10 seconds.