Mô tả chi tiết
- The TVS and bead protection devices to protect the board so that the board will not be a surge, high voltage damage.
- SIM card circuit: increase SMF05C chip electrostatic discharge.
- The antenna circuit: to ensure short and straight, so as to ensure that the signal strength.
- PCB show: silk mark each interface, convenient secondary development, full compliance with SIM900A hardware design manual design.
- A 5V power supply Interface: We do protection, even reversed, it will not burn the board. Early computer debugging USB-powered computer can be; for a long time to transfer data consumption greater than 1A DC we recommend.
- All the way TTL interface: Supports 3.3V and 5V MCU MCU. That kind of support 5V microcontroller 51 and STM32 microcontroller.
- Two Antenna Interface: SMA antenna interface, IPX MINI antenna interface (the default is not welding).All the way to 232-level interface: that you can directly connect the module to the computer via a raised 232 --- USB serial cable. You can also USB - TTL connected to the computer, based on individual parts circumstances. Do not need to spend more money to buy parts and this is the biggest difference is the other sellers