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For the first use, if it has been powered on, it can be used directly; if it has not been powered on, install the battery, plug the 2-core plug of the battery box into the battery socket (white) on the circuit board. Wait for the power indicator light to stay on, indicating that the program is running. If you need to reset the rotary switch again, please disconnect the power after setting (more than 1 minute to ensure that the microcontroller is completely reset or short-circuit the two short needles of the white socket on the main board) and then power on. At this time, users can install the sensor on site and put it into use. The wireless sensor should be placed as high as possible and in a relatively open space. It is recommended to be more than 1 meter above the ground; avoid placing metal objects around the sensor to avoid weakening the wireless signal; electronic interference may come from the following objects, so they should be avoided: generators, high current equipment, high voltage relays, transformers, etc.; vibration or impact may also be a source of interference, so the equipment should be kept stationary as much as possible during installation. Please do not install the equipment in an environment beyond the measurement range of the sensor, otherwise it may cause the product to malfunction and permanent damage to the sensor.
Count the second one from the left in the figure as the sensor address selected by the rotary switch. The user needs to select and set the slave station address within 001~255. The setting will take effect after power off and restart.
The method of setting the address with the rotary switch is as follows:
As shown in the figure, the rotary switch and the values represented by each bit, switch to “ON” is the valid value, switch to the opposite direction of “ON” is the invalid value, the address is the sum of the valid values. For example: if the address is 100, then the 3rd, 6th and 7th bits of the rotary switch are switched to the ON position, that is, 4+32+64=100.
Communication Protocol
Register address
0000H
0001H
0002H
0003H
0004H
0005H
0006H
0007H
0008H
Parameters
Temperature
Humidity
Spare
Spare
TVOC
CO2
Spare
Spare
Spare
Unit
℃
%RH
PPM
PPM
Range
-40-80
0-100
0-50
0-5000
Sample Value
/10
/10
/10
/1
Operation
Read only
Read only
Read only
Read only
Parameters
0009H
000AH
000BH
000CH
000DH
000EH
000FH
Parameters
Spare
Spare
Spare
Spare
Battery voltage
Online sign
signal strength
Unit
Range
Sample Value
Operation
Connect to Dragino gateway and ChirpStack
Connect via LAN port with direct connection from PC ,Power on the gateway, access the gateway with the url( 10.130.1.1) in the browser( Access via WiFi AP network http:// IP_ADDRESS:8000 ), click LORA, and select correct frequency plan and frequency band mask. The default frequency band mask is: 1 . click Save & Apply
Select the LORANWAN configuration interface to set the NS address of the gateway. We use The CHIRPSTACK server as example for the test, so select CUSTOM and select it according to the real server address. Record the GATEWAY EUI information. click Save & Apply.
Log in to the ChirpStack server Enter the IP address and port, enter the user name and password, and click Login.
Add a LORAWAN gateway. Click Gateways and CREATE to enter the gateway EUI, which is the gateway EUI shown in the pictures below.
Add an app Click Applications and click CREATE to add an app
Device Description DEVEUI of device, select the corresponding frequency band, and click Add Device, as shown in picture below. AU915 communication is not very stable, which may be related to the frequency band. It is recommended to disable the frame count verification function.
Add APPKEY, enter APPKEY parameter in Application Key, and click SET device-keys.
Click DEVICE DATA to view the DATA
DECODE Example function Decode(fPort, bytes, variables) { var paramLength = bytes[2]/2; var params = new Object(); for(var i=0;i<paramLength;i++) { params[“param”+i] = bytes[3+i2]256+bytes[4+i*2]; } return params; }
DECODER
function decodeUplink(input) {
var params = new Object();
params[“Temp”] =
input.bytes[3]256+input.bytes[4]
The default working mode of the module is wideband, the transmit/receive frequency points are 150.050MHz, and the transmit/receive subcarriers are 67Hz. If no AT command is received to change the parameters, the module will work according to the default parameters. In data communication mode, the PTT pin must remain high. The normal operation of the module requires a 3.6-4.2V power supply and at least 1A of current. When the PD pin is at a high level, the module works. When the PD pin is at a low level, the module is turned off.
1. After the module is powered on, if no AT command is received, the default working parameters are: Bandwidth: Wideband Transmit frequency: 150.050MHz Receive frequency: 150.050MHz Transmit subcarrier: 67Hz Receive subcarrier: 67Hz Squelch level: 2 Scrambler: Off Compression: Off Transmit timeout: Off MIC sensitivity: 6 Audio output level: 62. In data communication mode, the PTT pin cannot be low level. 3. Working conditions of the module:Recommended DC voltage: 3.6-4.2V, the power supply must provide more than 1A current; The PD pin of the module must be high level; PD can be used as the on/off control pin of the module.
AT command type
1) Command without parameter：
AT＋<command>,eg.：AT+DMOCONNECT
2) Command with parameter：AT＋<command>=<par1>,<par2>,<par3>…
3） Response command format are as below :
<CR><LF><command string>
<CR><LF>
<CR> Enter，0x0D
<LF> Newline，0x0A。
1.2 AT Command format
All the AT command started with “AT”, And ended with<CR>。
The UART port default setting are as below:
8 bit data,
1 bit stop,
without parity ,
CTS/RTS,
9600 baut
ATcommand response format：
<CR><LF><command string><CR><LF>
Simplified instruction for SR105, SR110 and SR120 Serial for the older version SR-FRS-V and SR-FRS-U AT command you can visit this link: https://docplayer.net/91122125-Sr-frs-0w5-wireless-transmit_receive-data-transfer-module-uhf-vhf-uart-communication-protocol.html
AT+DMOGRP(old version command AT+DMOSETGROUP ): Set transmit frequency, receive frequency, sub audio, bandwidth, busy channel lockout, transmit power.
Description: Set frequency, sub audio frequency, power, bandwidth and other parameters.
Format: AT+DMOGRP=RFV,TFV,RXCT,TXCT,Flag,Flag1Example (text input): AT+DMOGRP=450.02500,450.02500,RR,TT,0,0 (Carriage return/line feed) Because RR and TT represent sub audio frequencies, they cannot be entered directly in text format; see explanation below. RFV, TFV, frequency values, must be 5 digits after the decimal point.
RFV: Receive frequency value:400.00000-480.00000MHZ (integer multiple of 6.25K or 2K5) TFV: Transmit frequency value:400.00000-480.00000MHZ (integer multiple of 6.25K or 2K5) Note: The transmit frequency and receive frequency can be the same frequency or different frequencies (ASCII) RXCT: DO D1 Receive coding has 2 BYTES. (Hexadecimal number) Format: BCD code (see explanation below) The low four bits of RXCT1 are the decimal part. If DEC is not set, fill in FF FF. For example: 67.7 D0D1 data 0x77 0x06 D023N D0D1=23 80 D244N D0D1=44 82 D023I D0D1=23 C0 D251I D0D1=51 C2 TXCT: Transmit encoding (hexadecimal number), the same as receive encoding. Flag: (ASCII) Bit0 Busy channel lockout (0: Off 1: On) (default off) Bit1 Wide/narrow band (0: Wideband 1: Narrowband) (default wideband) FLAG = bit1 *2+ bit0; Flag1: (ASCII) (Invalid for SR105U model, please set FALG1 to 0) Bit0 High/low power (0: High power 1: Low power) (default high power) Default: Transmit/receive frequency 450.05000, sub audio 67Hz. FLAG1 = 0;
1. RXCT and TXCT are HEX, not ASCII, so commands cannot be sent directly in text format. For example:Enter the command in text mode on the computer: AT+DMOGRP=450.02500,450.02500,RR,TT,0,0(press Enter)In the PC serial port tool, switch to send in hexadecimal (HEX) format. The result is: 41 54 2B 44 4D 4F 47 52 50 3D 34 35 30 2E 30 32 35 30 30 2C 34 35 30 2E 30 32 35 30 30 2C 52 52 2C 54 54 2C 30 2C 30 0D 0A Red represents RR, TT corresponding positions R R T TIf the sub audio frequency you need is 67.0, after format conversion, the corresponding sub audio is 70 06; Replace RR and TT with 70 06, so the correct command is: 41 54 2B 44 4D 4F 47 52 50 3D 34 35 30 2E 30 32 35 30 30 2C 34 35 30 2E 30 32 35 30 30 2C 70 06 2C 70 06 2C 30 2C 30 0D 0A Then click Send.Note: 1. Sub audio setting method: 1) For analog sub audio For example: 67.0 67.0 →06 70→ D0 D1= 70 06 250.3 250.3 →25 03→ D0 D1= 03 25 2) For digital sub audio Positive polarity D1 MSB is 8; for example: D023N 023→8023→ D0 D1=23 80 D244N 244→8244→ D0 D1=44 82 Negative polarity D1 MSB is C; D023I 023→C023→ D0 D1=23 C0 D251I 251→C251→ D0 D1=51 C22. FLAG/FLAG1 setting method BIT1 BIT0 according to the 8421 BCD code to take the value FLAG = BIT1 * 2 + BIT0 FLAG1 = BIT1 * 2 + BIT0 For example: 1) FLAG: Bit1 = 1; bit0 = 0 FLAG corresponds to BCD code 2 + 0 = 2; FLAG set value is 2; 2) FLAG: Bit1 = 1; bit0 = 1 FLAG corresponds to BCD code 2 + 1 = 3; FLAG set value is 3; 2) FLAG: Bit1 = 0; bit0 = 1 FLAG corresponds to BCD code 0 + 1 = 1; FLAG set value is 1;
AT+DMOSAV(old version command AT+DMOAUTOPOWCONTR ): Automatic power saving function setting
CommandDescription: Set the automatic power saving function of the module.
Format: AT+DMOSAV=X
Example: AT+DMOSAV=0(Carriage return/line feed)
Response: +DMOSAV:0 Success +DMOSAV:1 Failure
Parameter description: X: 0 Set power saving on 1 Set power saving off (The default is 0, automatic power saving is turned on)
AT+DMOVOL( old version command AT+DMOSETVOLUME ): Output volume setting
Description: Set the audio output volume level of the module. The larger the value, the greater the volume. Format: AT+DMOVOL=X
Example: AT+DMOVOL=1 (Carriage return/line feed)
Response: +DMOVOL:0 Success +DMOVOL:1 Failure
Parameter description: X: Volume level parameter value range: 1-9 (The default is 6)
AT+DMOVOX( old version command AT+DMOSETVOX ): Voice control function setting
Description: Set the voice control trigger sensitivity of the module. The larger the value, the more sensitive the trigger.
Format: AT+DMOVOX=X
Example: AT+DMOVOX=0 (Carriage return/line feed)
Response: +DMOVOX: 0 Success +DMOVOX: 1 Failure
Parameter description: X: Voice control level parameter value is 0-8 levels, (default off) 0: Turn off voice control trigger transmission 1-8: Turn on voice control and represents the sensitivity level of voice control trigger. (The default is 8)
AT+DMOFUN( old version command AT+DMOSETMIC ): Parameter settings: squelch level, MIC sensitivity, transmit timeout, compression, scrambling
Description: Set the parameters of the module: squelch level, transmit timeout, MIC sensitivity, scrambling, compressionFormat: AT+DMOFUN=SQL,MICLVL, TOT,SCRAMLVL ,COMP Example: AT+DMOFUN=2,6,0,0,0(Carriage return/line feed) Response: +DMOFUN:0 Success +DMOFUN:1 Failure
Parameter description: SQ: Squelch level: 0-8 (0: Monitor mode) MICLVL: MIC sensitivity level parameter value is 0-8 levels (default level 5) TOT: Transmit timeout, setting range: 0~9; (default off) 0: Turn off transmit timeout 1~9: Represent transmit timeout 1 minute to 9 minutes respectively) SCRAMLVL: Scrambling function parameter value 0-7. (0 means scrambling is off), (default off) COMP: Compression function switch 0: Off 1: On (default off)
AT+DMOMES(old version command AT+DMOMES ) SMS sender sending command
Description: Set the SMS sending function of the module, air rate 1200 baud rate
Parameter description: L: The character length of the SMS (hexadecimal number, maximum length 70BYTE). XXXXXXX: SMS content
Notes: 1. When sending SMS in text format, the “7” in the text actually represents 0X37 and will be wrong. Before sending, you must switch to HEX format to send, and manually change 0X37 to 0X7. Text input, directly converted to HEX, the length here is wrong: 41 54 2B 44 4D 4F 4D 45 53 3D 37 41 42 43 44 45 46 47 0D 0A You need to change 37 to 07, correct as follows: 41 54 2B 44 4D 4F 4D 45 53 3D 07 41 42 43 44 45 46 47 0D 0A2.
Note: The new modules cannot be compatible with the old products of the same type.
AT+DMODTF DTMF: sending and receiving (please contact customization, the standard shipping version does not contain this function)
Send DTMF signal
Description: Send DTMF digits 0-9 or letters ABCD*#
Description: After the module demodulates the received DTMF, it automatically uploads it through the serial port.
Format: +DMODTF:XY Example: +DMODTF:09
Response: None
Parameter description: XY received digits 00 received DTMF code: 0 10 received DTMF code: 1 11 received DTMF code: 2 12 received DTMF code: 3 13 send DTMF code: 4 14 received DTMF code: 5 15 received DTMF code: 6 16 received DTMF code: 7 17 received DTMF code: 8 18 received DTMF code: 9 XY received characters: 10 received DTMF: A 11 received DTMF: B 12 received DTMF: C 13 received DTMF: D 14 received DTMF: * 15 received DTMF: #
AT+DMOCONT: Handshake instruction, communication connection test
Description: Reset all parameters to factory default settings
Format: AT+DMOREST
Example: AT+DMOREST (Carriage return/line feed)
Response: +DMOREST:0
Parameter description: None.
AT+DMOEND: Tail tone setting
AT+DMOEND Echo tail setting (please contact customization if needed, standard shipping version does not contain this function)
Description: Turn on or off echo tail setting
Format: AT+DMOEND=X
Example: AT+DMOEND=0 (Carriage return/line feed)
Response: +DMOEND:0
Parameter description: X is an on/off switch to open or close the echo tail function 0: Turn on echo tail; (default) 1: Turn off echo tail;
Special instructions: Unless there is a clear requirement, please be sure not to turn off the echo tail. Turning off the echo tail will cause a large noise when the receiving end closes the speaker at the end of transmission.
AT+DMORSSI: RSSI signal strength query
Description: Query received signal strength,
Format: AT+DMORSSI
Example: AT+DMORSSI (Carriage return/line feed)
Response: + DMORSSI:XXX XXX is the signal strength value, just a relative value;
Parameter description: XXX: 000-127
Data reference: (The larger the returned value, the stronger the signal)
1. Parameter settings can be retained after power off; 2. After the module is powered on, you must delay 0.5S before setting various parameters of the module; 3. Parameters cannot be set when the module is in the transmit state;
AT+DMOVERQ: Query software version number
Description: Query module version command
Format: AT+DMOVERQ
Example: AT+DMOVERQ (Carriage return/line feed)
Response:+DMOVERQ:105U-VXXX
Parameter description: XXX is the software version number, such as 100
WT51822-S4AT Serial transparent transmission means that modules are connected with user MCU via a common serial interface to establish a two-way communication between user MCU and mobile devices. The module can obtain at least 200bytes transmission data and automatically send the data by separated packets, each wireless packet maximum load is 20byte. The data packet, which is sent to the module by mobile device side, must send subcontracting automatically(1-20byte/package), the module will forward to the MCU serial receiving port after receiving the data packet. Users can modify the module basic Bluetooth parameters serial AT commands. For details, please check “serial AT command” description.
1. Serial hardware protocol: default 9600bps. 8, No verify bit 1, Stop bit
2.“Enable” serial ports enable control, low level enable module serial port function making data communication with the client host MCU properly; high level closes the serial port function. At this time, the module Bluetooth can still transmit broadcast code, and can be paired connection, but you can not use the serial port functions;
3.In order to save the size, the module uses the TXD / RXD double wire serial methods, without increasing the data flow control. So it is not recommended to set the serial rate too high, in caseof packet loss or error code, recommend to use 9600bps or other baud rates like no higher than 38400bps;
4.Bluetooth module default connection interval is 20ms, if you need to save power and adopt low-speed forwarding mode, you can adjust Bluetooth connection interval via the AT command, the longest interval Bluetooth connectivity is 2000ms;
Serial AT commands Description:
WT51822-S4AT Module will automatically recognize and distinguish serial data, the data packet began with AT character will be defaulted as AT commands and parsing, and will return the process results, so the data under transparent transmission mode cannot begin with AT character.
The test command
Command format: AT\r Syntax: AT \ r
Returning value: OK\r Return value: OK \ r
Content: send AT test commands, returning value OK indicates module AT commands tested successfully.
MAC address Operation Command
Command Format: AT + ADDR \ r?
Return Value: xxxxxxxxxxxx \ r
Content: Return the module‟s current MAC address: xxxxxxxxxxxx Command Format: AT + ADDR = 123456789ABC \ r Return value: OK \ r Content: modify the module MAC address again: 123456789ABC, return value OK indicates the success of reset MAC address. Note: If the Bluetooth module modified the module MAC address successfully under being connected state, but the module will not switch immediately to the new address , it needs to disconnect the module , then the module will be broadcast with a new MAC address.
Operation command of Serial Port Communication Baud-rate Command format: AT + BAUD = 19200 \ r
Return value: OK \ r ERROR \ r
Content: Re-edit module communication baud rate to 19200bps, Return OK indicates the success of modification, Return ERROR indicates that the new baud rate modification fails, the reason is set point value is not common serial port baud rate value. Command Format: AT + BAUD \ r? Return Value:19200\ r Content: Check the current module serial communication baud rate, the module returns the current setting of the baud rate 19200bps.
NOTE: The module default baud rate is 9600bps, because if the serial port baud rate is too high, it need to increase RTS / CTS data flow control, otherwise there will be errors, it is recommended that the baud rate is no more than 57600bps. The serial port baud rates that current module supports : 1200/2400/4800/9600/14400/19200/28800/38400/57600/76800/115200/230400。
Operation Command of the Device Name
Command Format: AT + NAME = Wireless-tag01 \ r
Return value: OK \ r ERROR \ r
Content: Rename the module: Wireless-tag01, the length of a name must be no more than 20 bytes, the return value OK indicates the success of the rename, the return ERROR represents the renamed fails, you may have exceeded the limit length . Command Format: AT + NAME \ r? Return Value: Wireless-tag01 \ r Content: Check the module‟s current device name, serial port return to the module‟s current device name: Wireless-tag01.
NOTE: Modify the device name under the state of the Bluetooth being connected, the module will not modify immediately .It needs to disconnect the Bluetooth connection, and then the module will broadcast with a new device name.
Read Command of Module Parameter
Command: AT + RX \ r
Return Value: NAME: Wireless-tag01 \ r BAUD: 19200 \ r MAC: 123456789ABC \ r
Contents: Check the module‟s current parameter, return to the module‟s current device name, serial port baud rate and device MAC address.
Set Command of Module Transmit Power
Command Format: AT + RFPM = 3 \ r
Return value: OK \ r ERROR \ r
Content: Reset the modules transmit power, for example ,set the module transmission power to level 4 ,the transmit power is -8dbm, return OK indicates power reset successes, return ERROR indicates power reset fails, the reason may the set power level is not in the level list.
Command Format: AT + RFPM \ r?
Return Value: -8dbm \ r
Content: Check the transmit power configuration of the currentBluetooth module, return to the current setting of the transmission power value: -8dbm. NOTE: Bluetooth module currently supports setting transmit power level in the following table:
Power Level Power Value
0 +4dbm
1 0dbm
2 -4dbm
3 -8dbm
4 -12dbm
5 -16dbm
6 -20dbm
7 -30dbm
8 -40dbm
Reset Module Command
Command Format: AT + RESET \ r
Return value: OK \ r
Content: Module reset command, returns OK, the module reset successes. 7-Restore the Default Configuration Commands
Command Format: AT + DEFAULT \ r
Return value: OK \ r
Content: Recover the module configuration parameters to the default parameters, MAC address will also restore to the factory default address, return OK indicates the module successful recovery.
Query Command of Module Version Number
Command Format: AT + VERSION \ r
Return Value: V1.0 \ r
Content: Query module current version, return to module current version V1.0.
Customized Broadcast Data Command
Command Format: AT + ADD = 0123456A \ r
Return value: OK \ r ERROR \ r
Content: Users can add the customized broadcast data in Bluetooth broadcast data, such as adding 0123456A data in Bluetooth broadcast data, returns OK indicates added successfully , returns ERROR indicates failure added, data length may exceed the maximum limit 16byte.
Serial Number Command of Customized Product
Command Format: AT + PID = ABCD \ r
Return value: OK \ r ERROR \ r
Content: customized product serial number added in the broadcast data, returns OK indicates that the custom has been added, add a custom return ERROR indicates failure, possibly because the custom data is beyond the scope required by the serial number, the serial number of the module supports the content within 0000-FFFF.
Setting Command of Bluetooth Broadcast Interval
Command Format: AT + ADP = 500 \ r
Return value: OK \ r ERROR \ r
Contents: Bluetooth Broadcasting valid interval is 100ms-4000ms, if re-configure the Bluetooth radio interval to 500ms, returns OK indicates reset successfully, ERROR indicates reset failed.
Reset Command of Bluetooth Connection Interval
Command Format: AT + CIT = 300 \ r
Return value: OK \ r ERROR \ r
Content: An active Bluetooth connection interval is 20ms-2000ms, if resetting Bluetooth connection time interval to 300ms, returns OK indicates reset successfully, the return ERROR indicates reset failed.
NOTE: The module does not support dynamic modification process connection interval, only work when restart the module after modification.
Setting command of low-power sleep mode
Command Format: AT + SLEEP \ r
Return value: OK \ r
Content: To reduce module power consumption, module in idle state can be used to set to sleep by the sleep command, and then Bluetooth is turned off, power consumption is reduced. Module in sleep mode can be wake-up by an external interrupt, external interrupt wake-foot there are: enable, test, reset three pins, any one external pin interrupt, the module can wake from sleep, wake up way: reset pin falling edge wake up, pin state switches from high level to low level; enable, test Pin rising edge wake up, the pin status is switched from low to high; the module wake-up reset to re-enter the work state.
Test Mode of Transparent Transmission
When the users get the module samples, they always want to first test module Bluetooth functions without the support from hardware serial. According to this usage, the module designed Bluetooth transparent transmission test mode to give a high level signal to the test mode control foot (TEST pin) to control Bluetooth module into the transparent transmission test mode. At this time, the module can normally connect with the mobile device terminal APP through Bluetooth. The module will automatically transmitted back to the mobile terminal equipment after receiving the data transmitted from APP, realize two-way data communication function between Bluetooth module and the mobile device terminal. After the test, released TEST pin high level, re-powering or reset the module to enter normal operation status.
BLE Protocol Description(app port)
[Service UUID: 0x1234 ]
Application Examples of Bluetooth Module
Accessibility BLE-DK, WT51822-DK is tool designed for easy use its Wireless-Tag BLE Bluetooth WT51822-S1/S2/S4AT. You can easily connect the Bluetooth module with PC through the WT51822-DK. The Bluetooth module works as slave device, can be searched and matched by Bluetooth master terminal. After matched, input the data to Bluetooth module via serial port debugging tools and the Bluetooth module resent the data to the master module; at the same time, the Bluetooth module can send the data received from the master module to the serial port debugging tools. Developers can easily check the data content between the Bluetooth module and the master terminal.
The connection method of DEMO-Kit Tools and Bluetooth module: DEMO-Kit Tools interface is the currently popular XBee interface. Bluetooth module connect with Kit Tools by XBee adapter board. Welding the module posted in the corresponding XBee adapter board, and then inserted the adapter board into the Kit tools.
XBee adapter plate shown as below:
DEMO-Kit tool uses a FTDI USB-to-UART chip. so before connecting with PC, you first need to install the FTDI chip driver. After driver installation is successful, connect DEMO-KIT with PC through the USB cable, then the PC side can identify DEMO-Kit tools serial numbers;
Open the serial debugging tools in PC terminal, for example, the serial debugging assistant, the port number is FTDI Chip mapping Virtual COM port number, the serial port parameters set as follows: 9600 baud,; data format is 8 data bits, No parity, 1 stop bit format, and then open the serial port, read and modify the current Bluetooth module settings by AT commands ,
as shown;
Search the slave devices by mobile APP terminal, you can use thepublicly recognized bluetooth test software LightBlue in IOS system, and you can also use our company‟s self-made Blurtooth serial APP testing software in Android system. After searched the device name of Bluetooth module, you can successfully paired by clicking itand establish a Bluetooth connection, and send data to a Bluetooth module through this APP tool to establish data communication between a mobile terminal and Bluetooth modules. A. In the IOS system (only iphone4S or above version phones support Bluetooth 4.0) use LightBlue to test module connect function. Firstly, open iphone Bluetooth, run LightBlue APP, when LightBlue is running, it will automatically search for the slave unit, the slave list will be displayed with some main information, UUID Services, transmitting power, device names etc
Click the slave unit you want to connect, iphone will connect with the salve, afterthis, the program will automatically search all services from slave machine, as shown below.
Enter into the service by clicking the cooresponding service , you can see some characteristics included in the Services, shown as below
Click „Write new value‟, will enter into the communication field of Characteristic, write the input value, as below:
Module will push the data sets to the serial port via DEMO-KIT after receiving the data from LightBlue which can be displayed on the serial debugging tools by PC side:
In the Android system (only Android 4.3 or above systems support Bluetooth 4.0) , you can use our company self-made APP serial debugging tools: Using APP tools to search for Bluetooth devices:
Connect with Bluetooth device, and input data in the serial transmission window, sends data to Bluetooth device, the module will push the data sets to the serial port via DEMO-KIT after receiving the data from LightBlue which can be displayed on the serial debugging tools by PC side:
You can also use PC side debug tool to send data to the APP serial tool by module, APP display window shows the data sent by Module
App serial tool received data and showed in the display window:
It will create more comvenience and shorten the development period of bluetooth project by using our DEMO-KIT tool and self made APP serial debugging tool
●All the data in this communication protocol is hexadecimal.
●The data length is fixed 9 bits.
●Baud rate:9600, data bit:8, stop bit:1, parity bit: none.
2.Command list and meaning.
3.Command list and meaning.
0x86- Read CO2 concentration (for 0-50000ppm range)
CO2 concentration = HIGH *256+ LOW Eg. 01 in hexadecimal is equals to 1 in decimal, F4 in hexadecimal is equals to 244 in decimal. CO2 concentration=01*256+244=500ppm
0x9C- Read CO2 concentration (for 0-150000ppm range)
CO2 concentration= Data 1 << 24 + Data 2 << 16 + Data 3 << 8 + Data 4
LT-W208 LoraWAN Soil NPK Sensor node is powered by battery, with long battery life, no wiring, and convenient construction.Useing the LoraWAN spread spectrum technology which Products are widely used in the field of smart farming. this document shows a basic idea about LT-W208 LoraWAN Soil NPK Sensor node Connect to Dragino gateway and ChirpStack.
1.Connect via LAN port with direct connection from PC ,Power on the gateway, access the gateway with the url( 10.130.1.1) in the browser( Access via WiFi AP network http:// IP_ADDRESS:8000 ), click LORA, and select correct frequency plan and frequency band mask. The default frequency band mask is: 1 . click Save & Apply .
2. Select the LORANWAN configuration interface to set the NS address of the gateway. We use The CHIRPSTACK server as example for the test, so select CUSTOM and select it according to the real server address. Record the GATEWAY EUI information. click Save & Apply.
3. Log in to the ChirpStack server Enter the IP address and port, enter the user name and password, and click Login .
4. Add a LORAWAN gateway. Click Gateways and CREATE to enter the gateway EUI, which is the gateway EUI shown in the pictures below.
5. Add an app Click Applications and click CREATE to add an app.
7. Device Description DEVEUI of device, select the corresponding frequency band, and click Add Device, as shown in picture below. AU915 communication is not very stable, which may be related to the frequency band. It is recommended to disable the frame count verification function.
8. Add APPKEY, enter APPKEY parameter in Application Key, and click SET device-keys.
