[Chip Solution]：RTL8812CU-CG
[Antenna Interface]：IPEX
[Communication Distance]：200m
[Packaging]：SMD
[Size]：31*20mm
[Product weight]： 2.2±0.1g
[Introduction]：The E103-RTL8812CU is a low-cost, high-performance 2.4GHz + 5.8GHz dual-band WiFi module developed by Ebyte based on the Realtek RTL8812CU-CG chip solution. Featuring a USB 2.0 interface and a maximum speed of 867Mbps, the module offers a comprehensive solution for integrated wireless WLAN devices requiring high throughput performance.
Official Store
| Reference number | Pin-named name | Pin type | Pin applications |
| 1 | BAT_MEAS | ||
| 2 | PB4_LOGRXD | I/O | LOGRXD firmware download and log printing serial port |
| 3 | PB5_LOGTXD | I/O | LOGTXD firmware download and log printing via serial port |
| 4 | PB17 | I/O | Ordinary GPIO, which can be reused for other functions |
| 5 | PB18 | I/O | Ordinary GPIO, which can be reused for other functions |
| 6 | PB19 | I/O | Ordinary GPIO, which can be reused for other functions |
| 7 | PB20 | I/O | Ordinary GPIO, which can be reused for other functions |
| 8 | PB21 | I/O | Ordinary GPIO, which can be reused for other functions |
| 9 | PB30 | I/O | Wakeup Pin |
| 10 | PB31 | I/O | Wakeup Pin |
| 11 | CHIP_EN | RST | Restore the position of the leading foot |
| 12 | VDD | P | Module power supply VDD |
| 13 | GND | G | Module power supply GND |
| 14 | PA8 | I/O | Ordinary GPIO, which can be reused for other functions |
| 15 | PA12 | I/O | Ordinary GPIO, which can be reused for other functions |
| 16 | PA13 | I/O | Ordinary GPIO, which can be reused for other functions |
| 17 | PA14 | I/O | Ordinary GPIO, which can be reused for other functions |
| 18 | PA15 | I/O | Ordinary GPIO, which can be reused for other functions |
| 19 | PA16 | I/O | Ordinary GPIO, which can be reused for other functions |
| 20 | PA17 | I/O | Ordinary GPIO, which can be reused for other functions |
| 21 | PA18 | I/O | Ordinary GPIO, which can be reused for other functions |
| 22 | PA26 | I/O | Ordinary GPIO, which can be reused for other functions |
| 23 | PA27 | I/O | Ordinary GPIO, which can be reused for other functions |
| 24 | USB- | I/O | Ordinary GPIO, which can be reused as USB and other functions |
| 25 | USB+ | I/O | Ordinary GPIO, which can be reused for USB+ and other functions |
| 26 | PA30 | I/O | Standard GPIO, which can be reused for other functions, SWD CLK |
| 27 | PA31 | I/O | Ordinary GPIO, which can be reused for other functions, SWD DATA |
| 28 | NC | / | / |
| 29 | GND | G | Module power supply GND |
| 30 | NC | / | / |
| 31 | GND | G | Module power supply GND |
By default, AT instructions use UART for communication, with pin functions defined as follows:
| Pin points | Function | Note |
| PB30 | RX | Port rate: 115,200 |
Data bits: 8 bits | ||
Stop bit: 1 bit | ||
Checksum bits: None | ||
Command suffix: Enter and line break CRLF | ||
| PB31 | TX | For detailed instruction applications, please refer to the AT Instruction Manual. |
| Serial number | Pin Name | Pin Type | Pin Function Description |
| 1 | GND | RF | Antenna foot |
| 2 | NC | / | Reserved 2.4G/5G RF PAD for WLAN ANT1 |
| 3 | GND | RF | Antenna foot |
| 4 | GND | P | land |
| 5 | GND | P | land |
| 6 | GND | RF | Antenna foot |
| 7 | NC | / | Reserve 2.4G/5G RF PAD for WLAN ANT0 |
| 8 | GND | RF | Antenna foot |
| 9 | GND | P | land |
| 10 | NC | / | |
| 11 | NC | / | NC |
| 12 | NC | / | NC |
| 13 | GND | P | land |
| 14 | DM | AI/O | USB2.0 Transmitter/Receiver Differential Pair |
| 15 | DP | AI/O | USB2.0 Transmitter/Receiver Differential Pair |
| 16 | VDD33 | P | VDD 3.3V power supply |
| 17 | RESET | I | The module reset pin is internally pulled high by a 47K resistor and triggers a reset when the level is low. |
| IPEXO | RF | 2.4G/5G RF to IPEX connector for WLAN ANT0 | |
| IPEX1 | RF | for WLAN ANT1 2.4G/ 5G RF to IPEX connector | |
| Note: I-input; O-output; I/O-digital I/O; P-power or ground; | |||