Unwelded SIM800C GSM GPRS Module 5V/3.3V TTL Development Board IPEX with Bluetooth for STM32 C51

The Unwelded SIM800C GSM GPRS Module Development Board is a versatile communication solution for STM32 and C51 microcontroller projects. Offering compatibility with both 5V and 3.3V TTL levels, it facilitates seamless integration. The IPEX interface ensures antenna connectivity, and it features Bluetooth functionality for additional wireless capabilities. The SIM800C GSM GPRS module, supports reliable mobile communication, making it an ideal choice for applications requiring GSM connectivity, such as remote monitoring and IoT projects. The board’s flexibility and unwelded design cater to customization based on specific project requirements. 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) RDX: 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 Features Supports both 5V and 3.3V TTL levels for flexible integration. Facilitates antenna connectivity for reliable GSM/GPRS communication. Includes Bluetooth support for additional wireless capabilities.  Designed for STM32 and C51 microcontroller projects. Allows for customization based on specific project requirements. Features SIM800C module for reliable GSM/GPRS communication, suitable for IoT and remote monitoring applications. Antenna Interfacing type: IPEX Antenna