X893

Now easy to production. This China reflow start now with vehicle tracker schematic available After one week after works...

I use RSTERM software from roundsultions for programming Telit modules (GE863, GE865, GM862). But this program don't work with budget CP2102 USB-serial convertor. This simplest terminal program works with serial port via serial port class from .NET framework. Source codes available at github...

Now in development stage, with my biologist friend Addy de Jongh ( http://www.vriendenvandeotter.nl ), but all software applicable from high models. Small time for fixup (4-7 seconds with offline A-GPS) increases standalone battery time. All parts made in dimensions for 950 mA battery (54x32 mm - thanks China brothers). This photo contains all components - GPS active anetenna and GSM antenna. (50 ec not a price). Additional BMA180 accelerometer (small black chip at left top) can help to define activity and reduce ON time. In center placed STM32 MCU. Now STM32F101T8/B (or 103 if microUSB is mounted...

Traditional way looks very simple With DGPS support this simplest transform to more complex Initial state the same as on simple send position to server. But next stay more complex. After state 1 - server search nearst ground station (via current position, or last known position, or Cell ID information). Algorithm and how to collect ground stations see in step 1. After find near station server connect to STR channel and translate RTCM 2/3 to device via GPRS (2 on diagram). Other device (placed in other region - 3 on diagram) can send own position and other info to server but has other neast ground...

1. Create a database with records of CAS and STR and fast service broadcast RTCM. The schema is very simple. 2. Simple console p rogram (C# .NET 2.0) collects CAS and STR records to database . I used the site http://rtcm-ntrip.org:2101 as root site. The total number of unique CAS records (servers) = 280. The total number of STR records = 8822 . For DGPS support, I use only RTCM 2/3 mountpoints = 6934 records. 3. Query to find the STR channel using coordinates (also possible to use the Cell ID data from GSM module and opencellid to approximate the coordinates.) declare @Latitude real , @Longitude...