A
Anonymous
Apr 12, 2026
Rating: 4/5
Good value
Hardware is solid. Documentation could be clearer regarding pin mappings.
Description
STM32F103C8T6 Development Board / Multi-channel 2-channel / 3-channel RS485 / ModbusRTU Serial Protocol Converter Board
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Development Boards & Control Boards |
| Origin | - |
| Microcontroller Unit | STM32F103C8T6 |
| CPU Architecture | ARM Cortex-M3 32-bit |
| Flash Memory Capacity | 64 KB |
| Static RAM | 20 KB |
| Operating Input Voltage | 5V DC via USB or VIN |
| GPIO Logic Level | 3.3V TTL |
| RS485 Interface Count | 2 or 3 Channels |
| Supported Protocol | Modbus RTU |
| Debugging Interface | SWD and JTAG |
| PCB Dimensions | 55mm x 40mm x 12mm |
5 reviews
A
Anonymous
Apr 05, 2026
Rating: 5/5
Reliable communication
No packet loss on RS485 lines even in noisy environments. Verified purchase.
A
Anonymous
Mar 22, 2026
Rating: 3/5
Pinout confusing
Took time to find correct TX/RX pins. Board works but labeling is small.
A
Anonymous
Feb 20, 2026
Rating: 5/5
Great for Modbus projects
Works perfectly with my sensors. Easy to setup and the RS485 lines are stable.
A
Anonymous
Jan 20, 2026
Rating: 5/5
Exactly as described
Fast shipping and works well in control panel. Will buy again for next project.
5 FAQ
Q: Can I use Keil MDK for development?
A: Yes, the STM32F103C8T6 is fully compatible with Keil MDK and STMicroelectronics tools.
Q: What is the typical power consumption?
A: Approximately 30mA during normal operation without heavy peripheral load.
Q: What is the maximum baud rate supported?
A: The board supports up to 115200 bps reliably for Modbus RTU communication.
Q: Is it compatible with Arduino IDE?
A: Yes, you can use the STM32duino bootloader to program it via Arduino IDE.
Q: Is this board electrically isolated?
A: No, this is a non-isolated board. Please use an external isolator for high noise environments.
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