1. STM32F103C8T6: It is a model with a high market share in the single-chip microcomputer market, and is widely used in electronic design competitions, smart cars, robots, flight control, industrial control and other fields
2. GD32F103C8T6: It is a domestic alternative to STM32F103C8T6. The peripheral pins are exactly the same as 3. STM32F103C8T6. It is equipped with a new generation of Cortex M3 core, with higher CPU frequency, lower power consumption and higher cost performance.
4. STM32F103RCT6: Contains all the pins of STM32F103C8T6 and some other peripheral pins, which can directly use the STM32 large-capacity standard library
5. APM32E103RET6 is a domestic alternative to STM32F103RCT6. It has a higher main frequency clock and lower operating power consumption. The built-in flash is 2 times that of RCT6, and the SRAM is 2.7 times that of RCT6. It is more cost-effective
6. The board is equipped with STM32 small system circuit, among which STM32F103RCT6 and APM32E103RET6 are also equipped with a 6-axis IMU on board, which can be used to obtain motion attitude
7. The core board leads to all 1/0 port resources
8. With SWD simulation debugging download interface, compared with traditional JTAG debugging, it is more reliable in high-speed mode, and the probability of download failure is smaller
9. Immersion gold technology, small size, reasonable and standardized layout and routing, high-quality SMD crystal oscillator, high quality
10. Using the Type-C interface, it can be used for power supply, program download and serial communication
11. C8T6 is equipped with high-quality 1x20 pin headers to ensure firm contact. At the same time, it adopts half-hole technology to facilitate customers to solder leads
12. RCT6/RET6 is equipped with high-quality 2x15 pin headers to ensure firm contact, and can be placed on a universal board or breadboard according to requirements
13. Reserve SWD debugging interface, support J-link, ST-link simulation online debugging code
14. The onboard 8P FPC connector supports the connection of a 0.96-inch TFT color display, which can be used to display Chinese characters, character strings, and pictures
15. GD32F103C8T6/STM32F103C8T6 size: 18x51mm
16. APM32E103RET6/STM32F103RCT6 size: 35x55mm
17. GD32F103C8T6/STM32F103C8T6 weight: 6.7 grams
18. APM32E103RET6/STM32F103RCT6 weight: 11.8 grams

TFT color screen:
1. Size: 0.96 inches
2. Material: HD IPS LCD
3. Resolution: 80(H)RGBx160(V)
4. Driver chip: ST7735S
5. Communication interface: iic
6. Display color: full color
7. Display area: 10.8(H)x21.7(V)mm
8. Panel size: 13.5(H)x27.95(V)x1.5(D)mm
9. Pixel pitch: 0.135(H)x0.1356(V)mm
10. Connection method: plug-in type 8Pin (0.5mm pitch plug-in type)
11. Working current: 20ma
12. Working voltage: 3.3V
13. Working temperature: -20~70 degrees
14. Backlight type: side-lit LED backlight