GPRS GSM Module A9 Module SMS Voice Wireless Data Transmission IOT GSM Internet of Things

Overview 1 The A9 development board is a multi function development board based on the Axin A9G GPRS GSM module which can be used to verify the basic communication functions and peripheral functions of the A9 module 2 A9 development board has basic telephone sms GPRS network communication 3 A9 development board contains lithium battery charge management microphone speaker interface USB communication interface multiple user buttons led TF card slot acceleration sensor SPI interface I2C2 interface ADC interface 4 Pudding series development board camera expansion board can be connected to 30W 200W camera 5 A9 development board slot machine expansion board can be connected to a traditional coin machine Specifications Chip size 19 2 18 8 2 7mm 0 2mm Working temperature 30C 80C Working voltage is 3 5V 4 2V 4V power supply is recommended Boot voltage3 5V Low power average current is below 2ma Support GSM GPRS four frequency bands including 850 900 1800 1900MHZ GPRS Class 10 Sensitivity 105 Support voice calls Support SMS SMS GPIO level is 2 8V Support GPRS data service maximum data rate download 85 6Kbps upload 42 8Kbps Support standard GSM07 07 07 05 AT commands and Ai Thinker extension commands A9 supports 3 serial ports one download serial port and one AT command port AT command supports standard AT and TCP IP command ports Support digital audio and analog audio support HR FR EFR AMR v