GPSWith the development of positioner technology, the technical threshold is not too high.OBDThere are still some thresholds. Vehicle compatibility is a technical threshold. At present, it can be basically achieved on domestic gasoline vehicles.95%The above compatibility, but for the special vehicle frame number, total mileage and other key data information still need a professional team for the car.CANBus data adaption.
4GIn fact, the rise in this field is not very long, limited by cost and performance requirements, most of them.GPSIndustry Reuse2GNetwork, but the industry is basically determined by the price of hardware.
I'll give you the details of an introduction that most people in the industry use:
（1In4GA good manufacturer will inevitably use a band under the architectureCANOfMCUMaster control to collect and acquire automobilesOBD/CANData,4GUse large brands or support multi-network communication.4GCellular Network Module。
（2）GPSChips are mostly usedUbloxTaidou, Zhongkewei:Ublox7020（GPS，GLONASS，Galileo，QZSS) The overall effect is better than that of domestic multi-mode positioning chip (Beidou,GPS，GLONASS，QZSS，SBAS）。Ublox8030Support Beidou.
（3）g-sensoruseBosch(Bosch, Germany) is the best, high sensitivity, track will be good, if the vibration alarm, shift alarm false alarm rate will be relatively low, of course, six axes also have an imported brand.INVENSENSE。
（4) Power chipTI is the best, chip power supply current is large, stable.
（5) Whether or not to take batteries, if or not to use recharging with batteriesICChargingICIt will increase the cost, but it will make the battery charged under the condition of trickle current, constant current and constant voltage, full of automatic cut-off charging circuit, minimal damage to the battery, and it is not easy to produce battery overheating drum, ignition and explosion accidents. Money-saving hardware does not need to be rechargedICJust use a current limiting resistor.4.xxWhen the voltage is connected to the battery, the battery will always be in the state of current-limiting charging, and the battery life will be greatly reduced, which is prone to accidents such as bulging, explosion and so on.
（6) Whether the battery itself carries over-current and over-voltage protection and whether the protective board is made of fine workmanship also have price differences. If all the batteries are carried, it will be more expensive, and the danger factor of the cheap batteries will be doubled.
（7) Input and output plusESDProtection, coupled with increased protection against static electricity.
（8) Where the power input is addedTVSProtection, added can effectively prevent large surges on the circuit damage, inexpensive machines will save this protection.
（9）GSMThe performance of antenna is very important. Is the conduction up to standard? Is the antenna up to standard? This will go to the antenna factory after professional equipment debugging, good antenna performance.4Frequency is up to standard, which requires a process of repeated testing and revision.