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Original AI-thinker A9 GPRS + GSM SMS Voice Wireless Data Transmission Module

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                  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 x 18.8 x 2.7mm (±0.2mm)
                  Working temperature: -30 °C +80 °C
                  Working voltage: 3.5V-4.2V, 4V power supply is recommended
                  Boot voltage: >3.5V
                  Low power average current: 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: 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 voice coding


                  Package Included:

                  1 x GPRS GSM Module A9 Module

                  Document:

                   

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