Sim900a module, SMS, development board, GSM, GPRS, ST2, wireless data nsmission super TC35i

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Advantages of this module:Serial port circuit: TVS and ic bead protection devices are used to protect the board, so that the board will not be damaged by surges and high voltages.SIM card circuit: Add SMF05C electrostatic discharge chip. circuit: Keep it short and sight, so as to ensure the signal strength. display: Each interface is marked by silkscreen, which is convenient for secondary development, and the design completely follows the SIM900A hardware design manual.All the way 5V power supply interface: We have made protection, even if it is red, it will not the board. The computer USB power supply is sufficient for the initial debuing of the computer; long-term data nsmiion requires a large amount of electricity, and we recommend a DC above 1A.One TTL interface: supports 3.3V single-chip microcomputer and 5V single-chip microcomputer. In other words, it supports 51 types of 5V single-chip microcomputers and ST2 single-chip microcomputers.Two interfaces: SMA interface, IPX MINI interface (no welding by default).One 232 level interface: In other words, you can directly connect the module to the computer through a 232---USB serial cable. It can also be connected to a computer via USB-TTL, depending on personal acceories. No need to spend more money to buy acceories. This is the biest difference from other sellers.

Introduction to SIM900A Module

The power supply requirement of this module: 5V power supply, the computer USB power supply can meet the requirements in the initial stage of computer debuing. Because we added a large of 1000UF. Long-term data nsmiion requires a large amount of power. It is recommended to use a DC above 1A, and the TTL level serial port is adaptively compatible with 3.3V and 5V microcontrollers. It can be directly connected to the microcontroller. The standby mode is around 80MA, and the sleep state can be set to around 10MA for low power consumption. Both USB--232 and USB--TTL can be used for computer debuing, depending on each person's acceories. Support SMS, data, MMS, Internet, etc. The reset pin is led out to realize unattended remote reset on site, with DTMF function to realize remote control function. The biest advantage of the module is that it retains 232 ports, and can monitor the execution of 51 low-end single-chip microcomputers and module instructions during learning or development, which can find out the cause faster and save development and learning time. [Support 2,3,4G mobile phone card 】

Shipping listsim900a module*1GSM module *1Module power cord*1

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