1Pcs Sim900A Sim900 Mini V4.0 Wireless Data Transmission Module Gsm Gprs Board Kit + Antenna

The computer can give early computer debugging USB module power, a very amount of data under the condition of the recommended current more than 1A. Standby dozens of MA data can be set to provide dormancy, dormancy of 10MA low power. Support 2, mobile phone 3,4G card.

The serial port circuit: support for 3.3 V single chip microcomputer. TTL serial port support.3.3 and 5 V single chip microcomputer.The sim card circuit increase the SMF05C ESD chip.Antenna circuit: short and straight, in order to improve the signal strength.

PCB screen printing mark: any interface, convenient development twice, the SIM900 / ONE hardware is fully follow the design when the design manual.Two power supply interface: VCC5, 5 V DC above 1A. Computer 5 V power supply can be early computer USB. DC long data circuit over larger recommended 5V1A. VCC4, 3.5-4.5 V power supply, ibid., Suitable for lithium battery.

Control pin all leads.ONE ttl level, compatible with 3.3 V and 5 V.The two antenna interface, the standard SMA straight head, connector for IPXmini antenna.A way of speech interface, the way Mike interface.

The control interface of each pin description:

GND-GND

SIMR SIM900A RXD, TTL level, cannot be connected directly to the 232 level

SIMT SIM900A TXD, TTL level, cannot be connected directly to the 232 level

-SIM900A reset, active low

VCC_MCU when the SIM900A module and 5 V TTL level communication, this pin is connected to DC 5 V; When the level of communication of SIM900A and 3.3 V TTL, this pin is connected to DC 3.3 V.

VCC5-DC 5 V input.

VCC4 -DC3.5-4.5 input

Onboard Resources:

Serial port circuit (with protection)

Antenna interface circuit (SMA bend port female)

SIM card circuit (flip SIM slot)

4 * 3.5 fixture hole 4 pcs

SIM900A serial port output

Colour:black

Material:metal+PC

Package Contents:

1 x SIM900A Wireless module

1 Cable

1 x Antenna

Only the above package content, other products are not included.