The SIM900 is a GPRS module with no integrated GPS functionality. There are several ways to achieve positioning in sim900. 1. The external expansion GPS module, the US satellite positioning system, or Beidou, China, depends on which positioning system is supported by the selected mode. 2, sim900 itself can achieve base station positioning, the default is to use Google's server, but Google is good or bad at home, very unstable. 3. The module acquires the cell information of the base station through the AT and sends it to the server. The server then visits the third-party base station positioning platform (charge) to obtain specific coordinates and achieve indirect positioning. We will analyze and analyze the second sim900a positioning method, and the SIM900A base station positioning will be described in detail. The SIM900A module can return the interaction information of the currently located serving cell or the neighboring cell through the AT command. The network number includes the current serving cell or the neighboring cell number, and then the location can be located according to the number. The following is an interception of the AT command manual, for reference, we need mcc (country code), mnc (operator code), lac, cell. Membrane Switch,Membrane Keypad Switch,Customized Membrane Switch,Custom Membrane Switch CIXI MEMBRANE SWITCH FACTORY , https://www.cnjunma.com
