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Pinout Definition
Dual signal output (analog output
Power supply voltage detection
Output: Single 12V 1000mAh Max
GSM-GPRS Arduino SIM900A ISD1820 Pinout DefinitionIntroduction : GSM GPRS MODULE is an ultra compact and reliable wireless module. It is based on SIM900A 4 Frequency GPRS module. The GSM GPRS Shield is configured and controlled via its UART using simple AT commands. Module have two set power supply interface VCC5 5V power supply, VCC4 interface, 3. 5 4. 5V power supply, optional power on self starting (default) and control start. The MODULE allows you to achieve this via any of the three methods:
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