SIM900a module \ SMS \ GSM \ GPRS \ MMS \ wireless data transmission
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A: This module 5V power supply. Early debugging USB-powered computer to meet. IP data transmission time a large amount of data over the recommended 1A DC. IPX antenna interface default PCB antenna. Need to take glue stick or sucker SMA antenna can be replaced with an extension cord. Standby dozens MA. Sleep information provided, the power consumption is about 10MA. Support 2,3,4G phone card. Support SMS, data, MMS, phone calls, data acquisition. Reset pin leads, which enables remote reset. Friends need to put on 900 with foreign chip quad-band can be. Ultra-small size: 3.3 * 4.4MM embedded choice. The most important feature support 2,3,4G phone card. This module trial seven days, not satisfied with the unconditional return.
1: The ultra-small size for a variety of cuff and embedded.
2: Since the bomb slot, easy to replace the phone card. You can put the box aside reserve replacement phone mount.
3: IPX interface, which could be the replacement antenna. Default PCB antenna, greatly reducing: the use of space.
4: board with gold board, in terms of more consistent performance.
5: structured wiring board to ensure that time is running more stable.
6: This module plus a protective device, enabling anti-reverse, anti-hypertension, reduce the loss of the board, suitable for the project and learn.
A: SIM card chip circuitry increases SMF05C electrostatic discharge.
B: antenna circuit: to ensure short and straight, so as to ensure that the signal strength.
C: PCB Show: silk mark each interface, convenient secondary development, in full compliance with the design SIM900A hardware design manual design.
D: antenna interface: IPX interface, comes with built-in PCB antenna GSM dedicated, saving space.
E: all the way to 5V power supply connector. USB-powered computer can, because we added a super tantalum capacitors.
F: the way TTL interface: Supports 3.3V and 5V microcontrollers microcontrollers. That kind of support 51 5V microcontroller and STM32 microcontroller.
Three: computer control method USB - TTL and 5V supply Photo Gallery