Description
SIM900A Extension Module GSM/GPRS 900/1800MHz Board Antenna
Features:
The onboard two set power supply interface VCC5 5V power supply, VCC4 interface, 3.5–4.5V power supply, optional power on self starting (default) and control start.
The onboard SMA (default) and IPXmini antenna interface, SIM900A interface reserved reset.
The size of the module is 49*50, all the new and original device.
The computer can give early computer debugging USB module power supply,
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, mobile phone 3,4G card.
The serial port circuit: support for 3.3V single chip microcomputer.
TTL serial port support3.3 and 5V single chip microcomputer.
The SIM card circuit to increase the SMF05C ESD chip.
Antenna circuit: guarantee short and straight, so as to ensure the signal strength.
PCB display screen printing mark: each interface, convenient development two times,
the SIM900/A hardware is completely follow the design when the design manual.
Two power supply interface: VCC5, 5V DC above 1A.
Computer 5V power supply can be early computer USB.
DC long data circuit over larger recommended 5V1A.
VCC4, 3.5–4.5V power supply, ibid., suitable for lithium battery.
Control pin all leads.
A TTL level, compatible with 3.3V and 5V.
The two antenna interface, the default SMA straight head, connector for IPXmini antenna.
One way of speech interface, the way Mike interface.
The control interface of each pin description:
GND – GNDSIMR SIM900A RXD, TTL level,
can not be directly connected to the 232 levelSIMT SIM900A TXD, TTL level,
can not be directly connected to the 232 levelRST – SIM900A reset,
active lowVCC_MCU when the SIM900A module and 5V TTL level communication,
this pin is connected to DC 5V;
when the level of communication of SIM900A and 3.3V TTL,
this pin is connected to DC 3.3V.
VCC5—-DC 5V input.
VCC4——DC3.5–4.5 input
Onboard Resources:Serial port circuit(with protection)
Antenna interface circuit(SMA bend female port)SIM card circuit
(flip SIM slot)4*3.5 fixture hole 4pcsSIM900A serial port output terminal
Onboard Resources:
Serial port circuit(with protection)
Antenna interface circuit(SMA bend female port)
SIM card circuit(flip SIM slot)
3*3.5 fixture hole 4pcs
SIM900A serial port output terminal
– Dual-band 900/1800 MHz
– GPRS multi-slot class 10/8
– GPRS mobile station class B
– Meet GSM 2/2 + standards
– Class 4 (2 W @ 900 MHz)
– Class 1 (1 W @ 1800MHz)
– Size: 24 x 24 x 3 mm
Controlled by AT commands(GSM 07.07, 07.05 and SIMCOM enhanced AT command set)
– SIM application toolkit
– Supply voltage range: 4.5-5.2V
– Low power consumption: 1.5mA (sleep mode)
– Operating temperature range: -40 ° C to +85 ° C.
Software features:
– 0710 the MUX protocol
– Embedded TCP/UDP protocol
– FTP/HTTP (by July 2010 implementation) Enhanced version of software features Of FOTA (2010 implementation)
– MMS (2010 implementation)
– The Embedded AT (the first three quarter can be achieved)
Voice
– Tricodec
– Half Rate (HR)
– Full rate (FR)
– Enhanced Full Rate (EFR)
– Support for echo suppression algorithm
– AMR
– Half Rate (HR)
– Full rate (FR)
Interface:
– Support SIM card is 3V/1.8V interface
– Analog Audio Interface
– Support RTC
– SPI interface
– Serial Interface
– Antenna pad
– I2C
– GPIO
– PWM
– ADC
Compatibility:
– AT cellular command interface
Certification:
– ROHS
– TA
– REACH
Package Include:
1PC SIM900A 1800/1900 MHz Wireless Extension Module GSM GPRS Board + Antenna Free cable
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