Dragino LGT-92 LoRaWAN, Руководство пользователя

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LGT-92 LoRa GPS Tracker User Manual
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Location info:

Latitude: 02863D68
⇒
if (0x 02863D68 & 0x80000000 = 0 ):
value = 02863D68 /1000000 = 42.351976

Longitude: FAC29BAF
⇒
if (0x FAC29BAF & 0x80000000 = 1 ):
value = (0x FAC29BAF – 0x 100000000)/1000000 = -87.9094 57
Important note:
a) When power is low (<2.84v), GPS won’t be able to get location info and GPS feature will be
disabled and the location field will be filled with 0x0FFFFFFF, 0x0FFFFFFF.
b) In firmware version v1.5, Roll & Pitch is disabled by default.
c) When enable 9-axis motion sensor, the total payload will be 15 bytes, while US915/AU915
DR0 accept only 11 bytes payload. In this case, the payload on server will be ignore and
shows as below:
d) While GPS can’t get location info after timeout(FTIME Parameter), the latitude and longitude
will be filled with all 0x00:

Alarm : Example: 0x4B & 0x40 >> 6 = 0x01

BAT : Example: 0x4B45 & 0x3FFF
⇒
2885 (mV).
The battery info shows the current voltage, for LGT-92-LI version which powered by li-on
battery. User can use below mapping to indicate the battery in percentage:

> 4.0v : 80% ~ 100%

3.85v ~3.99v: 60% ~ 80%

3.70v ~ 3.84v: 40% ~ 60%

3.40v ~ 3.69v: 20% ~ 40%

< 3.39v: 0~20%

MD: Movement Detection mode :
-- 0x00: Disable Movement detect feature, uplink interval is same as TDC time