NATLRA1 LoRa Based Vehicle Asset Tracker User’s Manual Changes or modifications not expressly approved by the manufacturer could void the user’s authority to operate the equipment
Federal Communication Commission Statement (FCC, U.S.) This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
2. This device must accept any interference, including interference that may cause undesired operation of the device. Le présent appareil est conforme aux CNR d’Industrie Canada applicables aux appareils radio exempts de licence. L’exploitation est autorisée aux deux conditions suivantes: 1. l’appareil ne doit pas produire de brouillage; 2. l’appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d’en compromettre le fonctionnement.
Theory of Operation/Technical Description FCC ID:2ARKMNATLRA1 The device has only one user serviceable part, which is the battery. The device has a reed switch as the only user control, which is used to trigger a position capture. All operation is self contained. The device will only use one radio. RF Circuit Function 915MHz The main microcontroller assembles data packets for the Semtech SX1272 transceiver to modulate the data using LoRa modulation. LoRa modulation is a derivative of Chirp Spread Spectrum.
Steps to Transmit 1. Randomly select a channel between 0-71 making sure it was not used on the last transmit a. The gateway could limit this to any grouping of 8 contiguous channels when the device joins the network, but when attempting to join the network for the first time the device will use all 72 channels. Each block of 8 125kHz channels is assigned 1 500kHz channel. The channel blocks of 8+1 are 0-7+64, 8-15 +65, 16-23 +66, 24-31 +67, 32-39 +68, 40-47 +69, 48- 53 +70, and 54-63 +71. 2.
Channel Frequency (MHz) Bandwidth (kHz) 0 902.3 125 1 902.5 125 2 902.7 125 3 902.9 125 4 903.1 125 5 903.3 125 6 903.5 125 7 903.7 125 8 903.9 125 9 904.1 125 10 904.3 125 11 904.5 125 12 904.7 125 13 904.9 125 14 905.1 125 15 905.3 125 16 905.5 125 17 905.7 125 18 905.9 125 19 906.1 125 20 906.3 125 21 906.5 125 22 906.7 125 23 906.
24 907.1 125 25 907.3 125 26 907.5 125 27 907.7 125 28 907.9 125 29 908.1 125 30 908.3 125 31 908.5 125 32 908.7 125 33 908.9 125 34 909.1 125 35 909.3 125 36 909.5 125 37 909.7 125 38 909.9 125 39 910.1 125 40 910.3 125 41 910.5 125 42 910.7 125 43 910.9 125 44 911.1 125 45 911.3 125 46 911.5 125 47 911.7 125 48 911.
49 912.1 125 50 912.3 125 51 912.5 125 52 912.7 125 53 912.9 125 54 913.1 125 55 913.3 125 56 913.5 125 57 913.7 125 58 913.9 125 59 914.1 125 60 914.3 125 61 914.5 125 62 914.7 125 63 914.9 125 64 903.0 500 65 904.6 500 66 906.2 500 67 907.8 500 68 909.4 500 69 911.0 500 70 912.6 500 71 914.
Device Specifications Frequency Antenna Gain RF Sensitivity Battery Type GPS Connectivity Network Protocol Accelerometer Temperature Range Environmental Rating Dimensions 902-914Mhz -137dBm Lithium Thionyl Chloride Non-Rechargeable – 19,000mAh Tri-mode GPS/Galileo GLONASS. Geofencing and IMESS/QZSS optimization.
