Nordic nRF52840 Getting Started Guide

Testing the application
8. Find the device and click Connect.
The default device name for the ble_app_uart example is "Nordic_UART".
9. Select the UART RX characteristic value.
10.Write 30 31 32 33 34 35 36 37 38 39 (the hexadecimal value for the string "0123456789")
and click write.
The text "0123456789" is displayed in the terminal that is connected to the board via UART.
11.Enter any text, for example, Hello, in the terminal.
In nRF Connect, the UART TX characteristic value changes to the corresponding ASCII value. For
example, for Hello, the value is 48 65 6C 6C 6F.
1159720_163 v1.1
32

Nordic nRF52840 Specifications

General

Clock Speed	64 MHz
Flash Memory	1 MB
RAM	256 KB
USB	USB 2.0 Full Speed
Operating Voltage	1.7 V to 5.5 V
GPIO	48
IEEE 802.15.4	Yes
NFC	NFC-A Tag
Temperature Range	-40°C to +85°C
ADC Resolution	12-bit
Processor	ARM Cortex-M4
Bluetooth	Bluetooth 5.0
Package	QFN48, WLCSP