1 Bộ Chuyển Đổi Dữ Liệu Không Dây Sim900A Sim900 Mini V4.0

Giới thiệu 1 Bộ Chuyển Đổi Dữ Liệu Không Dây Sim900A Sim900 Mini V4.0

The onboard two set power supply interface VCC5 5 V power supply, VCC4 interface, 3.5-4.5 V power supply, optional power on self start (default) and control start.The onboard SMA (standard) and IPXmini antenna interface, SIM900A interface reserved reset.The size of the ule is 49 * 50.
The computer can give early computer debugging USB ule power, a very large 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, 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: guarantee 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
RST-SIM900A reset, active low
VCC_MCU when the SIM900A ule 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 5V 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 ule
1 x Power Cable
1 x Antenna
Only the above package content, other products are not included.
Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
Giá HARAM