Using the RN400 as an SD card data logger

of the RN400 device. Without WiFi connection This article explains logging using an SD card. The SD card data logging function records data measured by the RN400 to an SD card.

1. Enter RN400 setting mode

First, while the RN400 product is operating, press the W -> S -> S -> W buttons in order to enter the 2.CONFIG MODE (AP) menu, and the following will be displayed.

On your smartphone, find and connect to a Wi-Fi network with the same name as shown on the RN400 display.

2. Set as SD card data logger and save

Open a web browser on your smartphone and enter “192.168.1.1” in the address bar.

To set the server to receive measurement data, tap Server Settings.

If SD Card Logger is selected, the following options appear. If 0 is entered, the SD Card Logger function is turned off. If 1 to 30 is entered, the RN400 device boots according to the entered value and waits for the value to be entered. You will save your data.

*Caution* Before pressing start, open the front of the RN400 and insert a micro SD card into the card slot located inside the front.

3. Start logging while rebooting

Once inserted, press Start to reboot the device.

When rebooting, time passes according to the value set in the SD card data logger function, and then data is saved, and the extension of the data file is saved in the .CSV file format.

4. RN400 Data Verification

After connecting to a computer with an SD card reader to check the saved data while doing data logger

If you search for the MAC folder, which is the 4th from the end of the MAC address of the device, it is divided into folders from when the measurement started, so you can find the measured data in the order of year and month and find the file as shown in the screen below.

If you click on the file to view the data

Measured date information, TimeStamp, MAC, channel, and value data are saved and can be managed.