SIM900A GSM GPRS Serial Module Ver.4 Minimal Dev Board

REV Version SIM900A Versi 5.1 (bukan Versi.4) Sudah termasuk Antena Spiral dan header (antena sudah tersolder, header belum tersolder) Module ini membutuhkan tegangan kerja 5V DC min 1A (rekomendasi 2A) TTL Out Level 3,3V (jika menggunakan Microcontroller/Arduino 5V di rekomendasikan pakai LLC / Logic Level Converter) Pin Out kaki lihat pada Gambar produk. This module ultra-stable, current 2A, the module uses TTL serial communication, direct docking with serial microcontroller, ARM, it is convenient, support 3.3 ~ 5V level. The studio launched an enhanced version of the fourth edition of SIM900A module, has been released, this module without positioning, on-board antenna, can send and receive SMS, GPRS data, transparent transmission, a variety of packages available, free shipping free shipping! ! Pure selling at a loss! ! ! Large dwell Module interface and module configuration is as follows: Onboard a giant tantalum, copper antenna, automatic power circuit, circuit card replacements charged, the headset microphone input and output, the sleep circuit, reset circuit. About Power 5V version: (Sim900A Ver 5.1) - gt; Yang sekarang anda beli This module supply range 4.5V ~ 5.5V, you can use USB3.0 or 5V switching power supply module for GSM, but remember, do not be greater than 5.5V, otherwise it will burn! ! ! 4.2V version: (Sim900A Mini Ver.4) This module supply range 3.5V ~ 4.8V, the module can be powered by a lithium battery to, but remember, do not be greater than 4.8V, otherwise it will burn! ! ! About Serial This module is TTL level interface, can be directly connected to the MCU, ARM, without conversion devices, and computer links need USB to TTL module to communicate, not with RS232, RS485 and other serial link, the module will burn! ! About Power: Shutdown Current: 4mA (reset pin GND connection under circumstances) Working Current: 50mA (average) Standby current: 20mA (transition 0 ~ 20ma)