A9 is the latest GSM/GPRS module launched by Essence. The cost reduction of the core chip makes the whole solution more cost-effective. It provides information transmission functions such as serial port to GPRS/short message/voice call, which is widely used in the fields of Internet of things/vehicle/electric environment detection.
A9G is a complete quad-band GSM/GPRS+GPRS/GPS module. The cost reduction of the core chip makes the whole solution more cost-effective. It is convenient to apply to various IoT hardware terminal occasions.
( Among A9Tracker related functions, the A9 module uses the base station positioning function, and the A9G module can choose to set the base station positioning function or the GPS positioning function, and upload the current position information to WeChat or app regularly. When positioning indoors, due to GPS signals Too weak, it is recommended to set the base station positioning function. For details, refer to the following documents)
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