车载测算终端，使用STM32F103主控芯片，加上移远GPS+4G模块，上传行驶轨迹，后台计算面积。典型的物联网车载终端产品，方便移植到其他物联网产品上。(Using STM32F103 main control chip, plus the GPS + 4G module, upload the driving track, and calculate the area in the background. The typical Internet of things vehicle term