SIM800C for Arduino STM32 with Bluetooth and TTS With Voice Reply ICStation

SIM800C GSM GPRS Module for Arduino STM32 C51 with Bluetooth and TTS:

http://www.icstation.com/sim800c-gprs-module-arduino-stm32-with-bluetooth-p-8552.html

Description:

Power input: DC5V or received by a lithium battery input VBAT and GND.

Supports MCU level: 5V / 3.3V for TTL logic (Such as the common 51 and the arduino is 5v, STM32 is the 3.3v)

Antenna use: IPEX antenna interfaces, you can use the version PCB antenna or antenna IPEX-SMA- peppers


Pin Description:

5V: power supply pin, the only input DC5V, used to power the board.

V_TTL: access control board microcontroller core target voltage of 5V /
3.3V (according to its own microcontroller is much to distinguish
kernel v), this pin is used to convert the GSM module board TXD and RXD
for the corresponding TTL logic.

GND: power supply ground

TXD: send pin serial port module, TTL level (not directly connected to RS232 level)

RXD: receive pin serial port module, TTL level (not directly connected to RS232 level)

DTR: Data Terminal Ready

SPKP: Core Audio output pin

SPKN: Core Audio output pin

MICN: Core Audio input

MICP: Core Audio input

RI: Ring core pin tips

VRTC: RTC pin external battery

GND: power supply ground

PWR: This pin can turn down or turn off the module

GND: power supply ground

VBAT: lithium battery input pin, 3.3v-4.4v