System modes can be change by 2-position hardware switch SW1-2:

Position SW1=0 SW2=0

• Accelometer enabled
• GNSS verbose OFF
• PDOP 2 m

Position SW1=1 SW2=0

• Accelometer disabled
• GNSS verbose ON
• GNSS power off
• STOP time short
• PDOP 2 m

Position SW1=0 SW2=1

• Accelometer disabled
• GNSS verbose ON
• GNSS never power off
• STOP time short
• FIX_ACQ_THS 600
• MIN_TNS 3
• MIN_TNS_TIME_THS
• PDOP 10 m

Production Mode has 2 missions: Active and Sustainable

Active mission acquire fix under 2 conditions: Movement is detected & A certain MIN period has passed.

Sustainable mission acquire fix under 2 conditions: A certain MIN period has passed & Movement has been detected within the certain MIN period .

Uplink Message payload_id = 0 format:

[%u] my_astro_payload_id, [%.1f] fix3d.pdop, [%d] fix3d.acq_time, [%lu] (uint32_t) ( fix3d.acq_total_time / 60 ), [%s] fv [%u] sys_mode

Uplink Message payload_id > 0 format:

[%u] my_astro_payload_id, [%.1f] fix3d.pdop, [%d] fix3d.acq_time, [%lu] (uint32_t) ( fix3d.acq_total_time / 60 ), [%ld] fix3d.latitude_astro_geo_wr, [%ld] fix3d.longitude_astro_geo_wr

Downlink Command format:

[%u] my_astro_payload_id, [%.1f] fix3d.pdop, [%d] fix3d.acq_time, [%lu] (uint32_t) ( fix3d.acq_total_time / 60 ), [%ld] fix3d.latitude_astro_geo_wr, [%ld] fix3d.longitude_astro_geo_wr

Downlink Commands:

Set Maximum time of one cycle of tracker (sys_watchdog_time_ths) 1, time = number of seconds for watchdog timer. One cycle of tracker can not last longer than this threshold for watchdog min time = 300 seconds (5 minutes) max time = 3600 seconds (1 hour)

Set Time of keepalive (my_rtc_alarmA_time) 2, time = number of seconds for deep sleep time (alarmA). Deep sleep can not last longer than this threshold. min time = 300 seconds (5 minutes) max time = 8 640 000 seconds (100 days)

Set Time of fix acquisition threshold (fix_acq_ths) 3, time = maximum number of seconds for fix acquisition. min time = 45 seconds (5 minutes) max time = 600 seconds (10 minutes)

Set Time threshold for finding 3 satellites (min_tns_time_ths) 4, time = maximum number of seconds for findind 3 satellites min time = 15 seconds (5 minutes) max time = 600 seconds (10 minutes)

Set PDOP Expected fix precion (pdop_ths) 5, precision = maximum number of seconds for findind 3 satellites min precision = 0.01 meters (10 centimeter) max precision = 100 meters

Get System 8,1 Configuration fv , sys_mode , sys_watchdog_time_ths , my_rtc_alarmA_time , fix_acq_ths , min_tns_time_ths , pdop_ths , 8,2 Status total gnss minutes of work , temperature measure by accelerometer

SYSTEM Software Reset 9,9