ET-C13
CP2102N USB-UART Adapter
3 Mbps USB-C serial adapter with flow control, 3.3 V
AED 19.00
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Overview
3 Mbps USB-C serial adapter with flow control, 3.3 V
The ET-C13 is built around the Silicon Labs CP2102N — USB 2.0 FS → UART 300bps–3Mbps, hardware flow control.
Designed in Dubai by ElectroTrical — the full schematic, BOM and design notes are published below.
Good for
- Flashing ESP32 and STM32
- Serial consoles for Linux boards
- High-speed logging
Key features
What makes it different
Bridge
Silicon Labs CP2102N: USB 2.0 FS → UART 300bps–3Mbps, hardware flow control
Drivers
Built-in on Windows 10/11, macOS, Linux (cp210x)
Logic
3.3V (5V-tolerant inputs)
Power
Internal 3.3V regulator — no LDO
Open documentation
Schematic, BOM and layout notes published for every board.
Breadboard friendly
Standard 2.54 mm pitch and M2.5 mounting holes.
Specifications
Technical specifications
| Bridge | Silicon Labs CP2102N: USB 2.0 FS → UART 300bps–3Mbps, hardware flow control |
|---|---|
| Drivers | Built-in on Windows 10/11, macOS, Linux (cp210x) |
| Logic | 3.3V (5V-tolerant inputs) |
| Power | Internal 3.3V regulator — no LDO |
| Size | 25.4 × 17.8 mm |
|---|---|
| Mounting | 2 mounting holes (M2.5) |
| Connectors | 8-pin 2.54 mm header · USB-C 16P receptacle (USB 2.0) — USB-C |
| Main IC | CP2102N-A02-GQFN24R (LCSC C969151) |
| Revision | Rev A |
Performance
Speed
Pinout
Pin map and connections
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VBUS | Power | 5V |
| 2 | GND | Ground | Ground |
| 3 | 3V3 | Power | ≤100mA from the internal regulator |
| 4 | TX | UART | Adapter → target RX |
| 5 | RX | UART | Target TX → adapter |
| 6 | RTS | UART | RTS |
| 7 | CTS | UART | CTS |
| 8 | DTR | UART | DTR |
Mechanical
Dimensions and what's in the box
In the box
- 1 × ET-C13 CP2102N USB-UART Adapter (assembled)
- 1 × 8-pin 2.54 mm male header, unsoldered
Getting started
- Wire the header: VBUS, GND, 3V3, TX, RX, RTS
Compare
Which USB adapter?
| CP2102N USB-UART Adapter (this board)This board | ET-C12 USB-C to I²C / Qwiic Adapter | ET-C20 CH340C USB-UART Adapter 5 V | ET-C03 USB-C to UART Adapter | |
|---|---|---|---|---|
| What it does | 3 Mbps USB-C serial adapter with flow control, 3.3 V | Talk to Qwiic sensors from a PC — no driver needed | 5 V logic USB-C serial with Arduino auto-reset | CH340C serial adapter with 3.3 V logic |
| Interface | — | — | — | — |
| Best for | Flashing ESP32 and STM32 | Testing sensors from Python | Programming Arduino Pro Mini | Debug consoles |
| Price | 19 AED | 20 AED | 49 AED | 27 AED |
Downloads
Documents and design files
Need a custom version of this board?
Different connector, size or sensor? We design and build custom variants.