Module GSM A9 Core IOT CALL SMS GPRS Serial SPI I2C For Arduino STM32

The A9 development board is a versatile development board based on EMC #39;s A9 GPRS / GSM module, which can be used to verify the basic communication and peripheral functions of the A9 module. A9 development board with the basic phone / SMS, GPRS networking communications. A9 development board contains a lithium battery charge management, microphone, speaker interface, USB communication interface, multiple user keys / led, TF card slot, acceleration sensor, SPI interface, I2C2 interface, ADC interface. A9 development board camera expansion board, an external 30W / 200W camera. A9 development board slot machine expansion board, can add a traditional slot machine. Tegangan kerja 5V via port MicroUSB/Pin VUSB 3.7-4.2V via port Vbat (Lion/Lithium) GPIO : 3.3V