芯讯通推出一款四频GSM/GPRS 850/900/1800/1900MHz模块SIM900-DS，支持双卡双待功能，采用SMT封装形式，其处理器内置了功能强大的 ...
Cellular shields for the Arduino have been around for ages, but this is the first one we’ve seen that turns your Arduino into a proper cell phone. The shield is based around the SIM900 GSM/GPRS radio ...
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