This is the user guide for SIM5218 EVB.
This manual describes the SIM5218 EVB development kit, a board that lets users evaluate the SIM5218 3G module. It lists the available interfaces—including UART, USB 2.0, SIM card, T‑Flash, camera and audio ports—and outlines key features such as power options and expanded I/O.
The guide explains how to connect the board to a PC or peripheral devices, configure the serial port (115200 baud), download firmware via USB, and safely power off the module. It also includes a parts list, connector pin‑outs, and mechanical drawings of the board and accessories.
| Power supply 1 | DC 6.0V~9.0V |
|---|---|
| Power supply 2 (J19) | 3.6V~4.2V |
| USB power supply | 5.0V |
| UART interfaces | 1 UART interface |
| USB interfaces | 1 USB 2.0 interface |
| SIM card interfaces | 1 SIM card interface |
| Camera interfaces | 3 camera interfaces |
| Audio interfaces | 4 audio interfaces |
Set the serial port to a baud rate of 115200.
Press the PWRKEY for about 1 second, or disconnect the USB cable if powered via USB.
Send the command AT+CSWITCHTEST=I to enter download mode.
The board can be powered from a DC 6.0‑9.0 V supply, a 3.6‑4.2 V supply at J19, or via USB 5 V.