Multitech MultiConnect xDot MTXDOT Series, Руководство разработчика

Страница: 26 / 67

SPECIFICATIONS AND PIN INFORMATION
26 MultiConnect
®
xDot
TM
MTXDOT Developer Guide
xDot Pinout Design Notes
Refer to the mechanical drawing for your model for pin locations.
All pins that go to connectors are directly connected to the processor.
Refer to Pin Information table for pull up and pull down information.
xDots allow you to program pins depending on your application:
Serial: Available out of the box. See Serial Pinout Notes for details.
mbed: Designed with the STM32L151CCU6 48-pin processor, this option provides the most flexibility. For
more information about processor capabilities, see the processor datasheet.
Serial Pinout Notes
These pins are available for serial applications. If using AT firmware, serial pins are the AT command port. If writing
an app, you need to configure the UART before using.
Refer to the pinout image for pin locations.
13 PA9 UART_TX
14 PA10 UART_RX
31 PA12 UART_RTS
32 PA11 UART_CTS
Serial Settings
When creating a serial connection with the device on the developer board, open communications software (such
as TeraTerm, Putty, or Minicom ), and use the following settings:
Baud rate = 115,200
Data bits = 8
Parity = N
Stop bits = 1
Flow control = Off
LoRa
Throughput Rates
Theoretical maximum speeds for LoRa mode with ACKs off are:
Using spreading factor 7 at 125kHz, the throughput rate is 5470 bps (5.47 kbps).
Using spreading factor 7 at 500kHz the receiving throughput rate is 21900 bps (21.9 kbps).
Note: Data rates in the LoRaWAN specification vary by geographic region.
Range
Variables effecting the range include TX power, antenna gain, RX sensitivity, fade margin, earth's curvature. Use
the following formula to calculate the maximum range: