MOKO MKL62ST-DT User manual
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
MKL62ST-DT User Manual
Version V1.1
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
CONTENTS
MKL62ST-DT User Manual.................................................................................................................... 1
1 About This Manual................................................................................................................................3
2 Packing List...........................................................................................................................................3
3 Overview and Specification.................................................................................................................. 3
3.1 Brief Introduction....................................................................................................................... 3
3.2 Key Features...............................................................................................................................4
3.3 Specification...............................................................................................................................4
4 Development environment.................................................................................................................... 4
5 System Block and Interface Instruction................................................................................................ 5
5.1 Function Block Diagram............................................................................................................ 5
5.2 Development Board Overview...................................................................................................5
5.3 Interface Instruction....................................................................................................................7
5.3.1 Power Supply...................................................................................................................7
5.3.2 UART Serial Interface.....................................................................................................8
5.3.3 Arduino nano 3.0 Interface............................................................................................10
5.3.4 STM32 Peripheral Interface.......................................................................................... 11
5.3.5 STM32 Firmware Download Debugging Interface......................................................11
5.3.6 MKL62BA LoRaWAN Module Firmware Download Debugging Interface................11
5.3.7 External LoRa Antenna Interface..................................................................................12
5.3.8 On Board Temperature and Humidity Sensor............................................................... 12
5.3.9 Button............................................................................................................................ 13
5.3.10 LED............................................................................................................................. 13
6 Quick Start...........................................................................................................................................14
6.1 AT Command Mode.................................................................................................................14
6.1.1 Quick Start AT Command Debugging..........................................................................14
6.2 Host Mode................................................................................................................................ 18
6.2.1 Operation Instruction.....................................................................................................19
6.2.2 LED Indicator................................................................................................................20
6.2.3 Uplink packet format.....................................................................................................20
7 Reference Document........................................................................................................................... 21
7.1 Demo Firmware........................................................................................................................21
7.2 AT Command Specification..................................................................................................... 21
8 Ordering Information...........................................................................................................................21
9 Revision...............................................................................................................................................21
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
1 About This Manual
This manual is used to introduce the hardware interface of development board to help users get
familiar with AT commands of MKL62BA and quickly start with DEMO application
fi
rmware.
2 Packing List
3 Overview and Specification
3.1 Brief Introduction
MKL62ST-DT is a small, open-source IoT development board specially designed for MOKO
LORAWAN
®
-Based module MKL62BA.
The low-power SMT32 chip is used as the external MCU, and it is integrated with the Sensirion
SHT30 temperature and humidity sensor. By running the demo application
fi
rmware provided
by MOKO, users can quickly familiar with the LORA
®
-Based network and see the temperature
and humidity sensor data on the LORAWAN
®
-Based network server.
Users also can connect different external sensors through a rich peripheral interface to quickly
design and validate a LORA
®
-Based node device. Moreover, since the Arduino NANO
connection is compatible, it will be easy to begin the LORA
®
-Based application design process.
Items Description
Development Board The development board has been welded with the required
MKL62BA module, and has all available hardware interfaces.
Type-C USB cable Used for USB power supply and data communication
2pin jumpers x 4 The jumpers are for 2.54 mm pitch headers used on
JP1,JP2,JP3,JP4
External LoRa dipole antenna External multiband LoRa dipole antenna, 1.6dBi, 860-930MHz
IPEX to IPEX cable By connecting two IPEX sockets,enable LoRa SMA connector
7pin header Used to connect SMT32 peripheral P1
2.54mm pitch 2*3 pin header Used for peripheral power supply J1
2.54mm pitch 1*15 female header Used for connecting Arduino board P2
2.54mm pitch 1*4 female header Used for connecting Arduino board P3
2.54mm pitch 1*2 female header x 2 Used for connecting Arduino board P6,P7
2.0mm pitch PH-2AWD 2pin
connector
Used for connecting battery
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
3.2 Key Features
Support standard LoRaWAN protocol
Power supply interface with a complete anti - surge, ESD, anti - reverse connection and
other protective design
Provide Li-battery connection interface, integrated lithium battery charge and discharge
management circuit
CP2102 USB-UART chip provides serial port function to facilitate program download and
debugging information printing
Provide SMT32 and LoRaWAN module serial port program interface
Compatible with Arduino NANO interface
Offers a variety of on-board peripheral SHT30 sensor, button, and LED
3.3 Specification
4 Development Environment
To use the on-board MCU SMT32 to develop different application firmware, it is
recommended to use the following tools, and only supports Windows system computers.
Items Parameters
MCU STM32L151C8T6A
Flash 64KB
RAM 32KB
Power Supply 3.7V rechargeable Li-battery or Type-C USB
Output Voltage 5V or 3.3V
Output Current Max. 500mA
LORAWAN Module MKL62BA
Protocol LORAWAN V1.0.2 and BLE V4.2
LORA Frequency Band 868MHZ/915MHZ(configurable by AT Command)
LORA TX Power Max.22dB
LORA Antenna IPEX or SMA interface antenna
On-board Peripheral SHT30 Sensor,2xLED,2xswitch
Dimension 80x36X12mm
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
Development software: Keil MDK5(http://www2.keil.com/mdk5)
Debugger and programmer tool: SEGGER J-LINK
To quickly get started with the MKL62BA LoRaWAN module AT commands, it only needs a
SerialNet data debugger software, such as SSCOM.
5 System Block and Interface Instruction
5.1 Function Block Diagram
Figure 1: MKL62ST-DT block diagram
5.2 Development Board Overview
Figure 2: MKL62ST-DT top view
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
Figure 3: MKL62ST-DT bottom view
Figure 4: MKL62ST-DT interface overview
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
5.3 Interface Instruction
5.3.1 Power Supply
There are three di
ff
erent parts for the power supply:
Input power supply: optional 5V type-C USB power supply or 3.7V rechargeable Li-battery
Power supply VCC 3.3V for on-board MCU SMT32, MKL62BA module and Arduino
Power supply 3.3V or 5V for peripheral
Figure 5: MKL62ST-DT power supply block
Figure 6: Power supply on board interface
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
5.3.2 UART Serial Interface
Through the different connections of jumper caps to JP1, JP2, JP3 and JP4, different serial
communication between USB, STM32 and MKL62BA can be realized.
Figure 7: UART serial interface pinouts diagram
UART mapping for MKL62ST-DT USB connect to MKL62BA module directly
USB MKL62BA Remark
UART_RX1 UART_TX Use a jumper connect JP1 PIN 2 and PIN 3
UART_TX1 UART_RX Use a jumper connect JP1 PIN 2 and PIN 3
Figure 8: Connecting USB UART to ML62BA modul
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
UART mapping from MKL62ST-DT USB connect to SMT32 then MKL62BA module
USB SMT32 Remark
UART_RX1 PA9_TX1 Use a jumper connect JP1 PIN 1 and PIN 2
UART_TX1 PA10_RX1 Use a jumper connect JP2 PIN 1 and PIN 2
SMT32 MKL62BA Remark
PA3_RX2 UART_TX Use a jumper connect JP3 PIN 1 and PIN 2
PA2_TX2 UART_RX Use a jumper connect JP4 PIN 1 and PIN 2
Figure 9: Connecting USB UART to SMT32
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
5.3.3 Arduino nano 3.0 Interface
Through the Arduino nano 3.0 interface, user can drive the module by an external MCU board
compatible with Arduino nano 3.0.
Figure 10: Arduino nano 3.0 pinout diagram
Figure 11: Arduino nano 3.0 interface on board
Notes:
When use an external MCU to driven the module, all jumper caps should be removed
from JP1,JP2,JP3,JP4 .
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
5.3.4 STM32 Peripheral Interface
The on-board MCU STM32L151CBT6A reserves the STM32 peripheral interfaces SPI, ADC, I2C,
and its pinout corresponds to the following:
Figure 12: STM32 peripheral interface pinouts Figure 13: STM32 peripheral interface on board
5.3.5 STM32 Firmware Download Debugging Interface
Through the SMT32 SWD interface, user can download firmware. The SWD pinout corresponds
to the following:
Figure 14: STM32 SWD pinouts Figure 15: STM32 SWD interface on board
5.3.6 MKL62BA LoRaWAN Module Firmware Download Debugging
Interface
This interface is reserved for updating the firmware of MKL62BA LoRaWAN Module, and its
pinout corresponds to the following:
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
Figure 16: MKL62BA SWD pinouts Figure 17: MKL62BA SWD interface on board
5.3.7 External LoRa Antenna Interface
There are two di
ff
erent external antenna interface: IPEX(U.FL) connector on MKL62BA module
and SMA connector on development board. Our standard package will provide a LoRa antenna
which requires use a IPEX to IPEX cable to connecting two IPEX sockets, and then enable SMA
antenna.
Figure 18: External LoRa antenna interface on board
5.3.8 On Board Temperature and Humidity Sensor
The on-board temperature sensor (Sensirion SHT30
https://www.sensirion.com/en/environment al-sensors/humidity-sensors/digital-humidity-
sensors-for-various-applications/) has an I2C interface and can be connected to the PB10 and
PB11 interfaces of MCU SMT32.
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
Figure 19: SHT30 sensor interface schematic Figure 20: SHT30 sensor on board
5.3.9 Button
The development board has two buttons, one button SW1 is the reset button. And the other
button is connected to the PA15 of SMT32,which can be reserved for subsequent development
of other functions.
Figure 21: Button schematic Figure 22: Button on board
5.3.10 LED
There are 2 LEDs on the development board for users to use, and users can control them
through the PA11 and PA12 interfaces of STM32.
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
Figure 23: LED schematic Figure 24: LED on board
6 Quick Start
MKL62ST_DT supports two different working modes: AT command mode and host mode. The
two working modes will be introduced separately below.
6.1 AT Command Mode
The purpose of AT Command mode is to help user get familiar with AT commands of MKL62BA
module.
6.1.1 Quick Start AT Command Debugging
Check the UART interface and make sure that the USB UART is directly connected to the
MKL62BA module UART. Install the LoRa antenna in the following way. You also can use
your own antenna with the IPEX connector to install it directly on the MKL62BA IPEX
connector.
Connect the USB cable to the computer, LED4 will be solid blue to indicate a successful
power connection.
Open the SerialNet data debugger software and set the COM, the following takes SSCOM as
an example:
1. Set ComNum: select COM with silicon Labs CP210x USB to UART Bridge.
2. Set COM parameters: set according tp the default values in the MKL62BA module.
Baud rate: 9600
Data bits: 8
Stop bits: 1
Parity: None
Flow control: None
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
3. Other SSCOM settings: select AddCRLF(CRLF will be added to each command in
default. Otherwise the \r\n is required type in at the end of each command.)
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
Start communication with MKL62BA module
1. Use AT commands to check communication status
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
2. The screenshot of the SSCOM will show the following settings:
A. Query and Get the device ID and KEY of the MKL62BA module through AT
commands.
B. Configure the network type as ABP or OTAA
C. Set Region Frequency
D. Set CLASS type
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
Notes:
After con
fi
guring the network join parameter, the user must reset the MKL62BA,
otherwise MKL62BA will not be able to join the network. If the user reads the default
parameters of the module and uses the default parameters to join the network, there is no need
to reset MKL62BA.
3. Register the module as an end device in the LoRa server and ensure that all the
parameters are correct. Send a network join request and get JOINED response. You
can see from the screenshot below that the module has established a connection
with the LoRa server.
For more AT Command applications, please refer to AT Command Speci
fi
cations:
<MKL62BA AT
Command>
6.2 Host Mode
In the host mode, users can download their own
fi
rmware to the SMT32 on the development
board or use an external MCU through Arduino interface to achieve communication with the
MKL62BA LoRaWAN module. The standard MKL62ST-DT has built-in MOKO DEMO application.
Let
’
s take MOKO
’
s DEMO application firmware as an example to demonstrate the uplink data of
temperature and humidity transmitted through the LoRa network. The following are the specific
steps.
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
6.2.1 Operation Instruction
Check and install the jumper caps according to the following figure. You can directly install
your own IPEX external antenna to the IPEX connector, or you can connect the IPEX socket
according to the following figure and install the SMA antenna provided by MOKO. And plug
in the USB to power on the development board and the blue LED will light on.
Get the join network parameters of MKL62BA.The default parameters are as follows. You
can also use AT command to get and set the parameters. Please refer to the operation in
chapter 6.1.1.
Register the module as an OTAA end device in the LoRa server and ensure that all the
parameters are correct.
After registering the device in the LoRa sever, a join network request from MKL62ST-DT will
be send automatically.
After successfully joining the network, the user can see on the server that the temperature
and humidity sensor data are reported every 10 seconds.
NO. Type Default value
1 Join Mode OTAA
2 DevEUI BLE MAC+ FFFF,
3 AppEUI 70B3D57ED0026B87
4 AppKey 2b7e151628aed2a6abf7158809cf4f3c
5 DevAddr The last four bytes of MAC address
6 AppSKey 2b7e151628aed2a6abf7158809cf4f3c
7 NwkSkey 2b7e151628aed2a6abf7158809cf4f3c
8 Region US915
9 Device Type ClassA
MOKO TECHNOLOGY LTD. MKL62ST-DT User Manual
Examples:C2
0B
14
1A
00
00
00
C2 0B: The converted integer is 3010, and the actual temperature is 30.1 degree
14 1A: The converted integer is 6676, and the actual humidity is 66.76%RH
6.2.2 LED Indicator
6.2.3 Uplink packet format
Bytes Type Data Type Description
1-2 Temperature Int
The data format is Little-endian, and data type is signed int.
After the data is converted, the actual value needs to be
divided by 100.
3-4 Humidity Uint
The data format is Little-endian, and data type is unsigned
int. After the data is converted, the actual value needs to be
divided by 100.
5-7 Battery Level Uint Reserved for battery information
Items Indicator
Power on Solid blue
Communication light Solid green
Transmitter data Green LED blink
Receive data Blue LED blink
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