I have this infra-red oximeter and it is based on STM32F030C8T6 and its PCB has 
pin headers place labeled as 
**RST,VCC,DIO,CLK,GND** 
and **RX0,TX0** as shown in photo.  

Is it possible to grub the main code or any way to communicate with it , note I don't have ST-link. 
[![enter image description here](https://i.stack.imgur.com/NeXZe.jpg)](https://i.stack.imgur.com/NeXZe.jpg)