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[EXS82] Engine GNSS, How ephemeris and almanac retrieving work | Thales IoT Developer Community

August 24, 2021 - 2:56pm, 568 views

Hello, 

I use the EXS82 Module and I don't understand how ephemeris and almanac retrieving work. 

I make fix cycles in Startmode "0". 

  1. Start module.
  2. Send "engine 3" to start GNSS.
  3. After 35s I receive "Engine OK". What happens during that time ? is this the treatment for Almanac/Ephemeris ?
  4. After few time I received a position. 
  5. I send "Engine 0" to stop GNSS.
  6. Finally, switch off module with "AT+SMSO" command.

When device is switched on again (without losing power supply, just switched off), Almanac and ephemeris are retained and used for next fix ?

I've seen, if SIM is inserted time taken to receive "Engine OK" is variable ( < 35s). 

Thanks for your help.