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Operating conditions:
Maximum operating temperature is 50 Degrees Celsius.
Minimum operating temperature is -20 Degrees Celsius.
Communication Interface:
I2C protocols.
SPI.
UART
OPERATIONAL INSTRUCTION:
Initialization:
NNT-TG05 is initialized by pulling the tab from the main power switch. Upon initialization, a Blue LED serves as a
“network status indicator”. A brief description of blue LED indicator is bulleted below.
Constant Blue LED illumination: unit is attempting to acquire network.
Blinking LED: Network acquisition successful.
Blue LED disappears several seconds and blinks every 11 seconds after network acquisition is successful.
Tracking:
Information such as device location, temperature, illuminance, and vibration events are all available in real time on
Oversight. If network is unavailable, the unit stores the aforementioned data which is subsequently transmitted
when coverage is reacquired.
Tertiary Power Supplies
The NNT-TG05 does not provide a viable means of providing power for peripherals. Hence voltage regulators
(LDO’s) were introduced. Typical voltage regulator is rated at 1.8 VDC output and is capable of supplying up to 200
mA of current. Our design accommodates interrupts, so there is negligible current draw until the device awakes
for pre-designated sampling or report intervals. A single 2.8V LDO provides bias for LED operation only.
Modem
Quectel BG96MA-128-SGN modem facilitates communication on CATM1, NBIoT and 2G networks. A multi-tuned
antenna also optimizes signal strength dBm (power ratio in Decibels) on all available networks. Increased memory
enhances the logging capability for extended “out of coverage” scenarios. Figure 1 contains a block diagram that
summarizes the design of this product.
Sensor Integration
