SIM800 GSM GPRS GPS SIM900A Upgrade Board Mod TTL 51 STM32 supp3.3/5v

Harga Untuk 1 Pcs Spesifikasi: -Ukuran: 83mm x 54.5mm (LxW) -SIM800 module is a GSM/GPRS module. -DC6-24v wide voltage power supply, can be used to facilitate the use of your system power supply. -Board high performance DC-DC power circuit, coupled with TVS protection, so that the stability of the system is greatly improved -Support 3.3 V / 5 V TTL level control, convenient and all kinds of commonly used microcontroller. The modules are separately listed in TX/RX/GND, use and convenience -With standard serial interface, easy to use PC control or debugging -With headphones and Mike interface, can be convenient to test the GSM voice call function -With SIM card ESD protection chip, protection of electrostatic SIM card plug when the -All available SIM800 pins are out to facilitate you to develop a variety of SIM800 applications -With RTC back-up battery -Have NET_STA light, convenient to watch the current SIM800 state.