File list (Check if you may need any files):
4，SIM900A模块资料\GPRS无线模块SIM900A硬件设计注意事项(技术白皮书).pdf
..................\SIM900-EVB_UGD_V1.01.pdf
..................\SIM900-EVB_V1.01_DL.pdf
..................\SIM900A_AT命令手册_V1.05.pdf
..................\SIM900A_Hardware Design_V1.03.pdf
..................\SIM900A_Supported_MCC_list_V1.00.pdf
..................\SIM900A_硬件设计手册_V1.04.pdf
..................\SIM900_DTMF.pdf
..................\SIM900_GSM_Location_ATC_V1 00.pdf
..................\SIM900_MMS_AT Command Manual_V1.00.pdf
..................\SIM900_TCP使用文档.pdf
..................\SIM900_tts_本地语音播报.pdf
4，SIM900A模块资料
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