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SIM808 next generation GSM, GPRS, GPS, Bluetooth (optional)
The SIM808 GSM / GPRS module is used for the four frequencies of the castle hole package. Its stable performance, compact appearance and high cost performance can meet the various needs of customers.
The SIM808 operates at GSM / GPRS / 1800/1900 850/900 MHZ for low-power voice, SMS and data transmission.
MHZ 850/900/850/900 quad-band
FTP / HTTP, embedded TCP / UDP protocol
DTMF detection, Bluetooth 3.0 (optional), USB interface
2: the introduction for Aruduin SIM808 shielding hardware
The power interface supports 5-20 v voltage input, pay attention to the voltage of 5-9 v, can provide power adapter current of not less than 2 a; support lithium battery (3.6-4.2 V)
Used for TTL level serial communication interface. Fully compatible with uino and compatible with other 5 V, 3.3 V, 2.85 V systems.
You can choose to use the hardware serial port (D0 D1) or the software serial port (D7 D8) through the jumper cap.
Support for MICRO SIMCARD.
Supports four headphone jacks (type I).
Update SIM800C firmware support via USB or serial port.
You can upgrade to the Bluetooth version of the board.
On-board TVS diodes, SIM card protection ICs, and two 100 uf tantalum capacitors provide stable performance for development boards.
3: introduce for Aruduin SIM808 shielding software
By communicating with the serial port of the external system through the TTL level, the default value can directly communicate directly with the 5 v system without having to match the level. Communicate with the 3.3 V, 2.85 V system and do a little hardware processing. We will give you a detailed introduction in the user manual.
The communication interface (command) used for the AT command is a function of the control module and is implemented by an AT command. For example, the control module uses the ATD to make a call* * * * * * * (*phone number). We will provide a complete set of AT commands.
In addition, we will provide common features of certain C program courses.