SIM808 development board GSM GPRS GPS Positioning SMS Data to STM32.51 Program
Onboard resources
1 GPS antenna interface, SMA interface, can be connected to active antenna (default), can also be connected to passive antenna
1 GSM antenna interface, SMA interface
1 way Bluetooth antenna interface, SMA interface
One voice interface, one microphone interface
A high-efficiency LDO power supply with an input voltage of 5--26V. Note that when the input voltage is less than 9V, please ensure that the power supply can supply 2A. Another power supply port 3.5--4.2V input (suitable for lithium battery power supply)
1·TTL level interface, perfect compatible with 5V 3.3V 2.85V level system
1 USB interface for easy update of SIM808 ancient sword
All important pins of the chip are taken out.
Fourth, the introduction
Insert a Unicom or mobile SIM card
Insert GPS antenna, GSM antenna, Bluetooth antenna (optional access to the antenna according to your application)
When debugging the computer, please connect the USB-TTL module; when the MCU is controlled, please connect to the serial port of the MCU.
Plug in the power adapter
Long press (about 2 seconds) to activate the button
Ready to start debugging