This is an example based on mbed-os cellular APIs that demonstrates a TCP or UDP echo transaction with a public echo server. Especially, BG96 operation check based Mbed OS 5.11, tested via SK Telecom in Korea

This code could be access via Cat.M1(BG96 module) of SK telecom network in Korea. Need a WIZnet BG96 board and development board. Before using this code, must be checking your modem is authorized or not from SK telecom. This code is based on Mbed OS 5.11.5.


Tested with

  • K66F
  • K64F

1. Import the application into your desktop

 mbed import

 cd mbed-os-example-cellular-BG96_os511

2. Compile and program

mbed compile -t <toolchain> -m <TARGET_BOARD>

(supported toolchains : GCC_ARM / ARM / IAR)

3. Download binary to a target board

4. Result


Built: Jun  4 2019, 13:45:53

[MAIN], plmn: (null)
Modem power on
Establishing connection

Connection Established.
TCP: connected with server
TCP: Sent 4 Bytes to
...Received from echo server 4 Bytes

Success. Exiting

5. Patched code

If need more information such as how to test, please look at