LT-22222-L LoRa IO Controller User Manual

[[http:~~/~~/www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/&file=changelog>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/&file=changelog]]

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1. Power ON Device

The LT controller can be powered by 7 ~~ 24V DC power source. Connect VIN to Power Input V+ and GND to power input V- to power the LT controller.

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PWR will on when device is properly powered.

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[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image004.png]]

1. Operation Mode

11. How it works?

The LT is configured as LoRaWAN OTAA Class C mode by default. It has OTAA keys to join network. To connect a local LoRaWAN network, user just need to input the OTAA keys in the network server and power on the LT. It will auto join the network via OTAA. For LT-22222-L, the LED will show the Join status: After power on TX LED will fast blink 5 times, LT-22222-L will enter working mode and start to JOIN LoRaWAN network. TX LED will be on for 5 seconds after joined in network. When there is message from server, the RX LED will be on for 1 second.

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In case user can’t set the OTAA keys in the network server and has to use the existing keys from server. User can [[use AT Command>>path:#AT_Command]] to set the keys in the devices.

1.

11. Example to join LoRaWAN network

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This chapter shows an example for how to join the TTN LoRaWAN Network. Below is the network structure, we use our LG308 as LoRaWAN gateway here.

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[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image005.png]]

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The LG308 is already set to connect to [[TTN network >>url:https://www.thethingsnetwork.org/]]. So what we need to do now is only configure register this device to TTN:

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**Step 1**: Create a device in TTN with the OTAA keys from LT IO controller.

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Each LT is shipped with a sticker with the default device EUI as below:

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[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image006.png]]

Input these keys in the LoRaWAN Server portal. Below is TTN screen shot:

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Add APP EUI in the application.

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[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image007.png]]

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Add APP KEY and DEV EUI

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[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image008.png]]

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**Step 2**: Power on LT and it will auto join to the TTN network. After join success, it will start to upload message to TTN and user can see in the panel.

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[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image009.png]]

1.

11. Uplink Payload

There are five working modes + one interrupt mode on LT for different type application:

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* [[MOD1>>path:#MOD1]]: (default setting): 2 x ACI + 2AVI + DI + DO + RO

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* [[MOD2>>path:#MOD2]]: Double DI Counting + DO + RO

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* [[MOD3>>path:#MOD3]]: Single DI Counting + 2 x ACI + DO + RO

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* [[MOD4>>path:#MOD4]]: Single DI Counting + 1 x Voltage Counting + DO + RO

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* [[MOD5>>path:#MOD5]]: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO

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* [[ADDMOD6>>path:#MOD6]]: Trigger Mode, Optional, used together with MOD1 ~~ MOD5

1.

11.

111. AT+MOD=1, 2ACI+2AVI

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The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes send one uplink by default.

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|Size(bytes)|2|2|2|2|1|1|1

|Value|(((

AVI1

voltage

)))|(((

AVI2

voltage

)))|(((

ACI1

Current

)))|(((

ACI2

Current

)))|DIDORO*|(((

Reserve

)))|MOD

**DIDORO** is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below

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|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0

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|RO1|RO2|DI3|DI2|DI1|DO3|DO2|DO1

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* RO is for relay. ROx=1 : close，ROx=0 always open.

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* DI is for digital input. DIx=1: high or float, DIx=0: low.

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* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.

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Note: DI3 and DO3 bit are not valid for LT-22222-L

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For example if payload is: 04 AB 04 AC 13 10 13 00 AA FF 01

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The value for the interface is:

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AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V

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AVI2 channel voltage is 0x04AC/1000=1.196V

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ACI1 channel current is 0x1310/1000=4.880mA

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ACI2 channel current is 0x1300/1000=4.864mA

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The last byte 0xAA= 10101010(B) means

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* [1] RO1 relay channel is close and the RO1 LED is ON.

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* [0] RO2 relay channel is open and RO2 LED is OFF;

LT33222-L:

* [1] DI3 channel is high input and DI3 LED is OFF;

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* [0] DI2 channel is low input;

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* [1] DI1 channel is high input and DI1 LED is OFF;

LT22222-L:

* [1] DI2 channel is high input and DI2 LED is ON;

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* [0] DI1 channel is low input;

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* [0] DO3 channel output state

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** DO3 is float in case no load between DO3 and V+.;

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** DO3 is high in case there is load between DO3 and V+.

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** DO3 LED is off in both case

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* [1] DO2 channel output is low and DO2 LED is ON.

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* [0] DO1 channel output state

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** DO1 is float in case no load between DO1 and V+.;

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** DO1 is high in case there is load between DO1 and V+.

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** DO1 LED is off in both case

1.

11.

111. AT+MOD=2, (Double DI Counting)

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**For LT-33222-L**: this mode the **DI3** is used as a counting pin. Counting on DI3 reflect in COUNT1.

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**For LT-22222-L**: this mode the **DI1 and DI2** are used as counting pins.

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Total : 11 bytes payload

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|Size(bytes)|4|4|1|1|1

Reserve

)))|MOD

**DIDORO** is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below

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|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0

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|RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1

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* RO is for relay. ROx=1 : close，ROx=0 always open.

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* FIRST: Indicate this is the first packet after join network.

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* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.

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Note: DO3 bit is not valid for LT-22222-L.

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To use counting mode, please run:

AT+MOD=2

ATZ

AT Commands for counting:

**For LT33222-L:**

AT+TRIG1=0,100 (set DI3 port to trigger on low level, valid signal is 100ms)

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AT+TRIG1=1,100 (set DI3 port to trigger on high level, valid signal is 100ms )

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AT+SETCNT=1,60 (Set COUNT1 value to 60)

**For LT22222-L:**

AT+TRIG1=0,100 (set DI1 port to trigger on low level, valid signal is 100ms)

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AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )

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AT+TRIG2=0,100 (set DI2 port to trigger on low level, valid signal is 100ms)

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AT+TRIG2=1,100 (set DI2 port to trigger on high level, valid signal is 100ms )

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AT+SETCNT=1,60 (Set COUNT1 value to 60)

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AT+SETCNT=2,60 (Set COUNT2 value to 60)

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**For both LT22222-L & LT33222-L**:

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AT+CLRCOUNT clear all countings

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AT+COUTIME=60 Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)

1.

11.

111. AT+MOD=3, Single DI Counting + 2 x ACI

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**LT33222-L**: This mode the DI3 is used as a counting pin.

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**LT22222-L**: This mode the DI1 is used as a counting pin.

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|Size(bytes)|4|2|2|1|1|1

|Value|COUNT1|(((

ACI1

Current

)))|(((

ACI2

Current

)))|DIDORO*|Reserve|MOD

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**DIDORO** is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below

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|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0

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|RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1

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* RO is for relay. ROx=1 : close，ROx=0 always open.

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* FIRST: Indicate this is the first packet after join network.

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* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.

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Note: DO3 is not valid for LT-22222-L.

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To use counting mode, please run:

AT+MOD=3

ATZ

Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].

1.

11.

111. AT+MOD=4, Single DI Counting + 1 x Voltage Counting

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**LT33222-L**: This mode the DI3 is used as a counting pin.

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**LT22222-L**: This mode the DI1 is used as a counting pin.

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The AVI1 is also used for counting. AVI1 is used to monitor the voltage. It will check the voltage **every 60s**, if voltage is higher or lower than VOLMAX mV, the AVI1 Counting increase 1, so AVI1 counting can be used to measure a machine working hour.

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|Size(bytes)|4|4|1|1|1

Reserve

)))|MOD

**DIDORO** is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below

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|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0

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|RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1

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* RO is for relay. ROx=1 : close，ROx=0 always open.

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* FIRST: Indicate this is the first packet after join network.

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* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.

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Note: DO3 is not valid for LT-22222-L.

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To use this mode, please run:

AT+MOD=4

ATZ

Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].

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Plus below command for AVI1 Counting:

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AT+SETCNT=3,60 (set AVI Count to 60)

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AT+VOLMAX=20000 (If AVI1 voltage higher than VOLMAX (20000mV =20v), counter increase 1)

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AT+VOLMAX=20000,0 (If AVI1 voltage lower than VOLMAX (20000mV =20v), counter increase 1)

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AT+VOLMAX=20000,1 (If AVI1 voltage higer than VOLMAX (20000mV =20v), counter increase 1)

1.

11.

111. AT+MOD=5, Single DI Counting + 2 x AVI + 1 x ACI

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**LT33222-L**: This mode the DI3 is used as a counting pin.

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**LT22222-L**: This mode the DI1 is used as a counting pin.

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|Size(bytes)|2|2|2|2|1|1|1

|Value|(((

AVI1

voltage

)))|(((

AVI2

voltage

)))|(((

ACI1

Current

)))|COUNT1|DIDORO*|(((

Reserve

)))|MOD

**DIDORO** is a combination for RO1, RO2, DI3, DI2, DI1, DO3, DO2 and DO1. Totally 1bytes as below

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|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0

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|RO1|RO2|FIRST|Reserve|Reserve|DO3|DO2|DO1

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* RO is for relay. ROx=1 : close，ROx=0 always open.

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* FIRST: Indicate this is the first packet after join network.

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* DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.

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Note: DO3 is not valid for LT-22222-L.

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To use this mode, please run:

AT+MOD=5

ATZ

Other AT Commands for counting are similar to [[MOD2 Counting Command>>path:#COUNT_COMMAND]].

1.

11.

111. AT+ADDMOD=6. (Trigger Mode, Optional)

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**This mode is an optional mode for trigger purpose. It can run together with other mode.**

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For example, if user has configured below commands:

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* AT+MOD=1 à The normal working mode

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* AT+ADDMOD6=1 à Enable trigger

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LT will keep monitoring AV1/AV2/AC1/AC2 every 5 seconds; LT will send uplink packets in two cases:

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1. Periodically uplink (Base on TDC time). Payload is same as the normal MOD (MOD 1 for above command). This uplink uses LoRaWAN **unconfirmed** data type

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1. Trigger uplink when meet the trigger condition. LT will sent two packets in this case, the first uplink use payload specify in this mod (mod=6), the second packets use the normal mod payload(MOD=1 for above settings). Both Uplinks use LoRaWAN **CONFIRMED data type.**

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**AT Command to set Trigger Condition**:

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**Trigger base on voltage**:

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Format: AT+AVLIM=<AV1_LIMIT_LOW>,< AV1_LIMIT_HIGH>,<AV2_LIMIT_LOW>,< AV2_LIMIT_HIGH>

Example:

AT+AVLIM=3000,6000,0,2000 (If AVI1 voltage lower than 3v or higher than 6v. or AV2 voltage is higher than 2v, LT will trigger Uplink)

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AT+AVLIM=5000,0,0,0 (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)

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**Trigger base on current**:

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Format: AT+ACLIM=<AC1_LIMIT_LOW>,< AC1_LIMIT_HIGH>,<AC2_LIMIT_LOW>,< AC2_LIMIT_HIGH>

Example:

AT+ACLIM=10000,15000,0,0 (If ACI1 voltage lower than 10mA or higher than 15mA, trigger an uplink)

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**Trigger base on DI status**:

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DI status trigger Flag.

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Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >

Example:

AT+ DTRI =1,0 (Enable DI1 trigger / disable DI2 trigger)

**Downlink Command to set Trigger Condition**

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Type Code: 0xAA. Downlink command same as AT Command [[AT+AVLIM, AT+ACLIM>>path:#AT_Trigger]]

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Format: AA xx yy1 yy1 yy2 yy2 yy3 yy3 yy4 yy4

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AA: Code for this downlink Command:

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xx: 0: Limit for AV1 and AV2; 1: limit for AC1 and AC2 ; 2 DI1, DI2 trigger enable/disable

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yy1 yy1: AC1 or AV1 low limit or DI1/DI2 trigger status.

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yy2 yy2: AC1 or AV1 high limit.

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yy3 yy3: AC2 or AV2 low limit.

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Yy4 yy4: AC2 or AV2 high limit.

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Example1: AA 00 13 88 00 00 00 00 00 00

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Same as AT+AVLIM=5000,0,0,0 (If AVI1 voltage lower than 5V , trigger uplink, 0 means ignore)

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Example2: AA 02 01 00

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Same as AT+ DTRI =1,0 (Enable DI1 trigger / disable DI2 trigger)

**Trigger Settings Payload Explanation:**

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MOD6 Payload : total 11 bytes payload

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|Size(bytes)|1|1|1|6|1|1

|Value|(((

TRI_A

FLAG

)))|(((

TRI_A

Status

)))|(((

TRI_DI

FLAG+STA

)))|Reserve|Enable/Disable MOD6|(((

MOD

(6)

)))

**TRI FLAG1** is a combination to show if trigger is set for this part. Totally 1byte as below

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|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0

|(((

AV1_

LOW

)))|(((

AV1_

HIGH

)))|(((

AV2_

LOW

)))|(((

AV2_

HIGH

)))|(((

AC1_

LOW

)))|(((

AC1_

HIGH

)))|(((

AC2_

LOW

)))|(((

AC2_

HIGH

)))

* Each bits shows if the corresponding trigger has been configured.

Example:

10100000: Means the system has configure to use the trigger: AC1_LOW and AV2_LOW

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**TRI Status1** is a combination to show which condition is trigger. Totally 1byte as below

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|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0

|(((

AV1_

LOW

)))|(((

AV1_

HIGH

)))|(((

AV2_

LOW

)))|(((

AV2_

HIGH

)))|(((

AC1_

LOW

)))|(((

AC1_

HIGH

)))|(((

AC2_

LOW

)))|(((

AC2_

HIGH

)))

* Each bits shows which status has been trigger on this uplink.

Example:

10000000: Means this packet is trigger by AC1_LOW. Means voltage too low.

**TRI_DI FLAG+STA **is a combination to show which condition is trigger. Totally 1byte as below

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|bit7|bit6|bit5|bit4|bit3|bit2|bit1|bit0

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|N/A|N/A|N/A|N/A|DI2_STATUS|DI2_FLAG|DI1_STATUS|DI1_FLAG

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* Each bits shows which status has been trigger on this uplink.

Example:

00000111: Means both DI1 and DI2 trigger are enabled and this packet is trigger by DI1.

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00000101: Means both DI1 and DI2 trigger are enabled.

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**Enable/Disable MOD6 **: 0x01: MOD6 is enable. 0x00: MOD6 is disable.

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Downlink command to poll MOD6 status:

AB 06

When device got this command, it will send the MOD6 payload.

1.

11.

111. Payload Decoder

**Decoder for TTN/loraserver/ChirpStack**: [[http:~~/~~/www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/Payload_decoder/>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/Payload_decoder/]]

1.

11. Configure LT via AT or Downlink

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User can configure LT I/O Controller via [[AT Commands >>path:#_Using_the_AT]]or LoRaWAN Downlink Commands

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There are two kinds of Commands:

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* **Common Commands**: They should be available for each sensor, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands

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* **Sensor Related Commands**: These commands are special designed for LT-22222-L. User can see these commands below:

1.

11.

111. Common Commands:

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They should be available for each of Dragino Sensors, such as: change uplink interval, reset device. For firmware v1.5.4, user can find what common commands it supports: http:~/~/wiki.dragino.com/index.php?title=End_Device_AT_Commands_and_Downlink_Commands

1.

11.

111. Sensor related commands:

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==== Set Transmit Interval ====

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Set device uplink interval.

* AT Command:

AT+TDC=N

Example: AT+TDC=30000. Means set interval to 30 seconds

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* Downlink Payload (prefix 0x01):

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0x01 aa bb cc ~/~/ Same as AT+TDC=0x(aa bb cc)

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809

==== Set Work Mode (AT+MOD) ====

Set work mode.

* AT Command:

AT+MOD=N

Example: AT+MOD=2. Set work mode to Double DI counting mode

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820

* Downlink Payload (prefix 0x0A):

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0x0A aa ~/~/ Same as AT+MOD=aa

==== Poll an uplink ====

* AT Command:

There is no AT Command to poll uplink

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* Downlink Payload (prefix 0x08):

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0x08 FF ~/~/ Poll an uplink,

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Example: 0x08FF, ask device to send an Uplink

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840

==== Enable Trigger Mode ====

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Use of trigger mode, please check [[ADDMOD6>>path:#MOD6]]

* AT Command:

AT+ADDMOD6=1 or 0

1: Enable Trigger Mode

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0: Disable Trigger Mode

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* Downlink Payload (prefix 0x0A 06):

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0x0A 06 aa ~/~/ Same as AT+ADDMOD6=aa,

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==== Poll trigger settings ====

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Poll trigger settings,

* AT Command:

There is no AT Command for this feature.

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* Downlink Payload (prefix 0x AB 06):

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0xAB 06 ~/~/ Poll trigger settings, device will uplink [[trigger settings>>path:#Trigger_Settings]] once receive this command

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==== Enable / Disable DI1/DI2/DI3 as trigger ====

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Enable Disable DI1/DI2/DI2 as trigger,

* AT Command:

Format: AT+DTRI=<DI1_TIRGGER_FlAG>,< DI2_TIRGGER_FlAG >

Example:

AT+ DTRI =1,0 (Enable DI1 trigger / disable DI2 trigger)

* Downlink Payload (prefix 0xAA 02):

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0xAA 02 aa bb ~/~/ Same as AT+DTRI=aa,bb

==== Trigger1 – Set DI1 or DI3 as trigger ====

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Set DI1 or DI3(for LT-33222-L) trigger.

* AT Command:

AT+TRIG1=a,b

a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).

b : delay timing.

Example:

AT+TRIG1=1,100(set DI1 port to trigger on high level, valid signal is 100ms )

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* Downlink Payload (prefix 0x09 01 ):

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0x09 01 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)

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914

==== Trigger2 – Set DI2 as trigger ====

Set DI2 trigger.

* AT Command:

AT+TRIG2=a,b

a : Interrupt mode. 0: falling edge; 1: rising edge, 2: falling and raising edge(for MOD=1).

b : delay timing.

Example:

AT+TRIG2=0,100(set DI1 port to trigger on low level, valid signal is 100ms )

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* Downlink Payload (prefix 0x09 02 ):

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0x09 02 aa bb cc ~/~/ same as AT+TRIG1=aa,0x(bb cc)

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936

==== Trigger – Set AC (current) as trigger ====

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Set current trigger , base on AC port. See [[trigger mode>>path:#MOD6]]

* AT Command:

AT+ACLIM. See [[trigger mode>>path:#MOD6]]

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945

* Downlink Payload (prefix 0xAA 01 ):

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947

0x AA 01 aa bb cc dd ee ff gg hh ~/~/ same as AT+ACLIM See [[trigger mode>>path:#MOD6]]

948

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950

==== Trigger – Set AV (voltage) as trigger ====

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Set current trigger , base on AV port. See [[trigger mode>>path:#MOD6]]

* AT Command:

AT+AVLIM. See [[trigger mode>>path:#MOD6]]

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959

* Downlink Payload (prefix 0xAA 00 ):

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961

0x AA 00 aa bb cc dd ee ff gg hh ~/~/ same as AT+AVLIM See [[trigger mode>>path:#MOD6]]

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==== Trigger – Set minimum interval ====

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Set AV and AC trigger minimum interval, system won’t response to the second trigger within this set time after the first trigger.

* AT Command:

AT+ATDC=5. Device won’t response the second trigger within 5 minute after the first trigger.

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* Downlink Payload (prefix 0xAC ):

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0x AC aa bb ~/~/ same as AT+ATDC=0x(aa bb) . Unit (min)

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977

==== DO ~-~- Control Digital Output DO1/DO2/DO3 ====

* AT Command:

There is no AT Command to control Digital Output

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* Downlink Payload (prefix 0x02):

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986

0x02 aa bb cc ~/~/ Set DO1/DO2/DO3 output

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988

If payload = 0x02010001, while there is load between V+ and DOx, it means set DO1 to low, DO2 to high and DO3 to low.

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990

01: Low, 00: High , 11: No action

991

992

|Downlink Code|DO1|DO2|DO3

993

|02 01 00 11|Low|High|No Action

994

|02 00 11 01|High|No Action|Low

995

|02 11 01 00|No Action|Low|High

996

997

Note: For LT-22222-L, there is no DO3, the last byte can use any value.

998

999

Device will upload a packet if downlink code executes successfully.

==== DO ~-~- Control Digital Output DO1/DO2/DO3 with time control ====

* AT Command:

There is no AT Command to control Digital Output

1010

1011

1012

* Downlink Payload (prefix 0xA9):

1013

1014

0xA9 aa bb cc ~/~/ Set DO1/DO2/DO3 output with time control

1015

1016

This is to control the digital output time of DO pin. Include four bytes:

1017

1018

**First Byte:** Type code (0xA9)

1019

1020

**Second Byte**: Inverter Mode

1021

1022

01: DO pins will change back to original state after timeout.

1023

1024

00: DO pins will change to an inverter state after timeout

1025

1026

1027

**Third Byte**: Control Method and Ports status:

|Second Byte|Status

|0x01|DO1 set to low

|0x00|DO1 set to high

|0x11|DO1 NO Action

**Fourth Byte**: Control Method and Ports status:

|Second Byte|Status

|0x01|DO2 set to low

|0x00|DO2 set to high

|0x11|DO2 NO Action

**Fifth Byte**: Control Method and Ports status:

|Second Byte|Status

|0x01|DO3 set to low

|0x00|DO3 set to high

1048

|0x11|DO3 NO Action

1049

1050

**Sixth and Seventh Byte**:

1051

1052

Latching time. Unit: ms

1053

1054

Device will upload a packet if downlink code executes successfully.

Example payload:

1. A9 01 01 01 01 07 D0

1061

1062

DO1 pin & DO2 pin & DO3 pin will be set to Low, last 2 seconds, then change back to original state.

1063

1064

1065

1. A9 01 00 01 11 07 D0

1066

1067

DO1 pin set high, DO2 pin set low, DO3 pin no action, last 2 seconds, then change back to original state.

1068

1069

1070

1. A9 00 00 00 00 07 D0

1071

1072

DO1 pin & DO2 pin & DO3 pin will be set to high, last 2 seconds, then both change to low.

1073

1074

1075

1. A9 00 11 01 00 07 D0

1076

1077

DO1 pin no action, DO2 pin set low, DO3 pin set high, last 2 seconds, then DO1 pin no action, DO2 pin set high, DO3 pin set low

==== Relay ~-~- Control Relay Output RO1/RO2 ====

* AT Command:

There is no AT Command to control Relay Output

1087

1088

1089

* Downlink Payload (prefix 0x03):

1090

1091

0x03 aa bb ~/~/ Set RO1/RO2 output

1092

1093

If payload = 0x030100, it means set RO1 to close and RO2 to open.

1094

1095

01: Close , 00: Open , 11: No action

1096

1097

|Downlink Code|RO1|RO2

1098

|03 00 11|Open|No Action

1099

|03 01 11|Close|No Action

1100

|03 11 00|No Action|Open

1101

|03 11 01|No Action|Close

1102

|03 00 00|Open|Open

1103

|03 01 01|Close|Close

|03 01 00|Close|Open

|03 00 01|Open|Close

Device will upload a packet if downlink code executes successfully.

1108

1109

1110

==== Relay ~-~- Control Relay Output RO1/RO2 with time control ====

* AT Command:

There is no AT Command to control Relay Output

1115

1116

1117

* Downlink Payload (prefix 0x05):

1118

1119

0x05 aa bb cc dd ~/~/ Set RO1/RO2 relay with time control:

1120

1121

This is to control the relay output time of relay. Include four bytes:

1122

1123

**First Byte:** Type code (0x05)

1124

1125

**Second Byte(aa)**: Inverter Mode

1126

1127

01: Relays will change back to original state after timeout.

1128

1129

00: Relays will change to an inverter state after timeout

1130

1131

1132

**Third Byte(bb)**: Control Method and Ports status:

1133

1134

|Value|Status

1135

|0x11|RO1 and RO2 to NO

1136

|0x10|RO2 to NO, RO1 to NC

1137

|0x01|RO2 to NC, RO1 to NO

1138

|0x00|RO1 and RO2 to NC.

1139

|0x20|RO1 No Action, RO2 to NC

1140

|0x21|RO1 No Action, RO2 to NO

1141

|0x02|RO1 to NC, RO2 No Action

1142

|0x12|RO1 to NO, RO2 No Action

1143

1144

1145

**Fourth / Fifth Bytes (cc)**: Latching time. Unit: ms

1146

1147

Device will upload a packet if downlink code executes successfully.

**Example payload:**

1. 05 01 11 07 D0

Relay1 and Relay 2 will be set to NO , last 2 seconds, then change back to original state.

1. 05 01 10 07 D0

Relay1 will change to NO, Relay2 will change to NC, last 2 seconds, then both change back to original state.

1. 05 00 01 07 D0

Relay1 will change to NC, Relay2 will change to NO, last 2 seconds, then relay change to NO, Relay2 change to NC.

1. 05 00 00 07 D0

Relay 1 & relay2 will change to NC, last 2 seconds, then both change to NO.

==== Counting ~-~- Voltage threshold counting ====

1178

1179

When voltage exceed the threshold, count. Feature see [[MOD4>>path:#MOD4]]

* AT Command:

AT+VOLMAX ~/~/ See [[MOD4>>path:#MOD4]]

1184

1185

1186

* Downlink Payload (prefix 0xA5):

1187

1188

0xA5 aa bb cc ~/~/ Same as AT+VOLMAX=(aa bb),cc

1189

1190

1191

==== Counting ~-~- Pre-configure the Count Number ====

* AT Command:

AT+SETCNT=aa,(bb cc dd ee)

aa: 1: Set count1,

2: Set count2,

3: Set AV1 count

Bb cc dd ee: number to be set

1204

1205

1206

* Downlink Payload (prefix 0xA8):

1207

1208

0x A8 aa bb cc dd ee ~/~/ same as AT+SETCNT=aa,(bb cc dd ee)

==== Counting ~-~- Clear Counting ====

1215

1216

Clear counting for counting mode

* AT Command:

AT+CLRCOUNT ~/~/ clear all counting

1221

1222

1223

* Downlink Payload (prefix 0xA6):

1224

1225

0x A6 01 ~/~/ clear all counting,

==== Counting ~-~- Change counting mode save time ====

* AT Command:

AT+COUTIME=60 ~/~/ Set save time to 60 seconds. Device will save the counting result in internal flash every 60 seconds. (min value: 30)

1235

1236

1237

* Downlink Payload (prefix 0xA7):

1238

1239

0x A7 aa bb cc ~/~/ same as AT+COUTIME =aa bb cc,

1240

1241

range: aa bb cc:0 to 16777215, (unit:second)

1.

11. Integrate with Mydevice

1248

1249

1250

Mydevices provides a human friendly interface to show the sensor data, once we have data in TTN, we can use Mydevices to connect to TTN and see the data in Mydevices. Below are the steps:

1251

1252

1253

Step 1: Be sure that your device is programmed and properly connected to the network at this time.

1254

1255

Step 2: To configure the Application to forward data to Mydevices you will need to add integration. To add the Mydevices integration, perform the following steps:

1256

1257

1258

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image010.png]]

1259

1260

1261

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image011.png]]

1262

1263

1264

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image012.png]]

Step 3: Create an account or log in Mydevices.

1269

1270

Step 4: Search LT-22222-L(for both LT-22222-L / LT-33222-L) and add DevEUI.

1271

1272

Search under The things network

1273

1274

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image013.png]]

1275

1276

1277

After added, the sensor data arrive TTN, it will also arrive and show in Mydevices.

1278

1279

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image014.png]]

1280

1281

1282

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image015.png]]

1283

1284

1285

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image016.png]]

1286

1287

1288

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image017.png]]

1289

1290

1291

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image018.png]]

1.

11. Interface Detail

111. Digital Input Port: DI1/DI2 /DI3 ( For LT-33222-L, low active )

1297

1298

Support NPN Type sensor

1299

1300

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image019.png]]

1.

11.

111. Digital Input Port: DI1/DI2 ( For LT-22222-L)

1307

1308

The DI port of LT-22222-L can support NPN or PNP output sensor.

1309

1310

Internal circuit as below, the NEC2501 is a photocoupler, the Active current (from NEC2501 pin 1 to pin 2 is 1ma and the max current is 50mA. When there is active current pass NEC2501 pin1 to pin2. The DI will be active high

1311

1312

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image020.png]]

1313

1314

When use need to connect a device to the DI port, both DI1+ and DI1- must be connected.

1315

1316

1317

**Example1**: Connect to a Low active sensor.

1318

1319

This type of sensor will output a low signal GND when active.

1320

1321

* Connect sensor’s output to DI1-

1322

* Connect sensor’s VCC to DI1+.

1323

1324

So when sensor active, the current between NEC2501 pin1 and pin2 is:

1325

1326

//IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.

1327

1328

If DI1+ = 12v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 12mA , So the LT-22222-L will be able to detect this active signal.

1329

1330

1331

**Example2**: Connect to a High active sensor.

1332

1333

This type of sensor will output a high signal (example 24v) when active.

1334

1335

* Connect sensor’s output to DI1+

1336

* Connect sensor’s GND DI1-.

1337

1338

So when sensor active, the current between NEC2501 pin1 and pin2 is:

1339

1340

//IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 1K.

1341

1342

If DI1+ = 24v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 24mA , So the LT-22222-L will be able to detect this high active signal.

1343

1344

1345

**Example3**: Connect to a 220v high active sensor.公司测试一下

1346

1347

Assume user want to monitor an active signal higher than 220v, to make sure not burn the photocoupler

1348

1349

* Connect sensor’s output to DI1+ with a serial 50K resistor

1350

* Connect sensor’s GND DI1-.

1351

1352

So when sensor active, the current between NEC2501 pin1 and pin2 is:

1353

1354

//IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image021.png]] = DI1+ / 51K.

1355

1356

If sensor output is 220v, the //IF//[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image022.png]] = 4.3mA , So the LT-22222-L will be able to detect this high active signal safely.

1.

11.

111. Digital Output Port: DO1/DO2 /DO3

1362

1363

NPN output: GND or Float. Max voltage can apply to output pin is 36v.

1364

1365

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image023.png]]

1.

11.

111. Analog Input Interface

1373

1374

The analog input interface is as below. The LT will measure the IN2 voltage so to calculate the current pass the Load. The formula is:

1375

1376

AC2 = (IN2 voltage )/12

1377

1378

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image024.png]]

Example to connect a 4~~20mA sensor

1383

1384

We take the wind speed sensor as an example for reference only.

1385

1386

Specifications of the wind speed sensor:

Red:12~~24v

Yellow:4~~20mA

Black:GND

Connection diagram:

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image025.jpg]]

1398

1399

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image026.png]]

1.

11.

111. Relay Output

The LT serial controller has two relay interfaces; each interface uses two pins of the screw terminal. User can connect other device’s Power Line to in serial of RO1_1 and RO_2. Such as below:

1408

1409

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image027.png]]

1410

1411

1412

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image028.png]]

1.

11. LEDs Indicators

|**LEDs**|**Feature**

1423

|**PWR**|Always on if there is power

1424

|**SYS**|After device is powered on, the SYS will **fast blink in GREEN** for 5 times, means RS485-LN start to join LoRaWAN network. If join success, SYS will be **on GREEN for 5 seconds. **SYS will **blink Blue** on every upload and **blink Green** once receive a downlink message.

1425

|**TX**|(((

1426

Device boot: TX blinks 5 times.

1427

1428

Successful join network: TX ON for 5 seconds.

1429

1430

Transmit a LoRa packet: TX blinks once

1431

)))

1432

|**RX**|RX blinks once when receive a packet.

|**DO1**|

|**DO2**|

|**DO3**|

|**DI2**|(((

For LT-22222-L: ON when DI2 is high, LOW when DI2 is low

1438

1439

For LT-33222-L: ON when DI2 is low, LOW when DI2 is high

1440

)))

1441

|**DI2**|(((

1442

For LT-22222-L: ON when DI2 is high, LOW when DI2 is low

1443

1444

For LT-33222-L: ON when DI2 is low, LOW when DI2 is high

1445

)))

1446

|**DI3**|For LT-33222-L ONLY: ON when DI3 is low, LOW when DI3 is high

1447

|**DI2**|(((

1448

For LT-22222-L: ON when DI2 is high, LOW when DI2 is low

1449

1450

For LT-33222-L: ON when DI2 is low, LOW when DI2 is high

)))

|**RO1**|

|**RO2**|

1. Use AT Command

11. Access AT Command

1460

1461

LT supports AT Command set. User can use a USB to TTL adapter plus the 3.5mm Program Cable to connect to LT for using AT command, as below.

1462

1463

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]

1464

1465

1466

In PC, User needs to set **serial tool**(such as [[putty>>url:https://www.chiark.greenend.org.uk/~~sgtatham/putty/latest.html]], SecureCRT) baud rate to **9600** to access to access serial console for LT. The AT commands are disable by default and need to enter password (default:**123456**) to active it. As shown below:

1467

1468

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image030.png]]

1469

1470

1471

More detail AT Command manual can be found at [[AT Command Manual>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/]]

1472

1473

AT+<CMD>? : Help on <CMD>

AT+<CMD> : Run <CMD>

AT+<CMD>=<value> : Set the value

1478

1479

AT+<CMD>=? : Get the value

1480

1481

ATZ: Trig a reset of the MCU

1482

1483

AT+FDR: Reset Parameters to Factory Default, Keys Reserve

1484

1485

AT+DEUI: Get or Set the Device EUI

1486

1487

AT+DADDR: Get or Set the Device Address

1488

1489

AT+APPKEY: Get or Set the Application Key

1490

1491

AT+NWKSKEY: Get or Set the Network Session Key

1492

1493

AT+APPSKEY: Get or Set the Application Session Key

1494

1495

AT+APPEUI: Get or Set the Application EUI

1496

1497

AT+ADR: Get or Set the Adaptive Data Rate setting. (0: off, 1: on)

1498

1499

AT+TXP: Get or Set the Transmit Power (0-5, MAX:0, MIN:5, according to LoRaWAN Spec)

1500

1501

AT+DR: Get or Set the Data Rate. (0-7 corresponding to DR_X)

1502

1503

AT+DCS: Get or Set the ETSI Duty Cycle setting - 0=disable, 1=enable - Only for testing

1504

1505

AT+PNM: Get or Set the public network mode. (0: off, 1: on)

1506

1507

AT+RX2FQ: Get or Set the Rx2 window frequency

1508

1509

AT+RX2DR: Get or Set the Rx2 window data rate (0-7 corresponding to DR_X)

1510

1511

AT+RX1DL: Get or Set the delay between the end of the Tx and the Rx Window 1 in ms

1512

1513

AT+RX2DL: Get or Set the delay between the end of the Tx and the Rx Window 2 in ms

1514

1515

AT+JN1DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 1 in ms

1516

1517

AT+JN2DL: Get or Set the Join Accept Delay between the end of the Tx and the Join Rx Window 2 in ms

1518

1519

AT+NJM: Get or Set the Network Join Mode. (0: ABP, 1: OTAA)

1520

1521

AT+NWKID: Get or Set the Network ID

1522

1523

AT+FCU: Get or Set the Frame Counter Uplink

1524

1525

AT+FCD: Get or Set the Frame Counter Downlink

1526

1527

AT+CLASS: Get or Set the Device Class

1528

1529

AT+JOIN: Join network

1530

1531

AT+NJS: Get OTAA Join Status

1532

1533

AT+SENDB: Send hexadecimal data along with the application port

1534

1535

AT+SEND: Send text data along with the application port

1536

1537

AT+RECVB: Print last received data in binary format (with hexadecimal values)

1538

1539

AT+RECV: Print last received data in raw format

1540

1541

AT+VER: Get current image version and Frequency Band

1542

1543

AT+CFM: Get or Set the confirmation mode (0-1)

1544

1545

AT+CFS: Get confirmation status of the last AT+SEND (0-1)

1546

1547

AT+SNR: Get the SNR of the last received packet

1548

1549

AT+RSSI: Get the RSSI of the last received packet

1550

1551

AT+TDC: Get or set the application data transmission interval in ms

1552

1553

AT+PORT: Get or set the application port

1554

1555

AT+DISAT: Disable AT commands

1556

1557

AT+PWORD: Set password, max 9 digits

1558

1559

AT+CHS: Get or Set Frequency (Unit: Hz) for Single Channel Mode

1560

1561

AT+CHE: Get or Set eight channels mode, Only for US915, AU915, CN470

1562

1563

AT+CFG: Print all settings

1.

11. Common AT Command Sequence

1569

111. Multi-channel ABP mode (Use with SX1301/LG308)

1570

1571

If device has not joined network yet:

123456

AT+FDR

123456

AT+NJM=0

ATZ

If device already joined network:

AT+NJM=0

ATZ

1.

11.

111. Single-channel ABP mode (Use with LG01/LG02)

1593

1594

123456 Enter Password to have AT access.

1595

1596

AT+FDR Reset Parameters to Factory Default, Keys Reserve

1597

1598

123456 Enter Password to have AT access.

1599

1600

AT+CLASS=C Set to work in CLASS C

1601

1602

AT+NJM=0 Set to ABP mode

1603

1604

AT+ADR=0 Set the Adaptive Data Rate Off

1605

1606

AT+DR=5 Set Data Rate

1607

1608

AT+TDC=60000 Set transmit interval to 60 seconds

1609

1610

AT+CHS=868400000 Set transmit frequency to 868.4Mhz

1611

1612

AT+RX2FQ=868400000 Set RX2Frequency to 868.4Mhz (according to the result from server)

1613

1614

AT+RX2DR=5 Set RX2DR to match the downlink DR from server. see below

1615

1616

AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1, this ID can be found in the LoRa Server portal.

ATZ Reset MCU

**Note:**

1. Make sure the device is set to ABP mode in the IoT Server.

1623

1. Make sure the LG01/02 gateway RX frequency is exactly the same as AT+CHS setting.

1624

1. Make sure SF / bandwidth setting in LG01/LG02 match the settings of AT+DR. refer [[this link>>url:http://www.dragino.com/downloads/index.php?dir=LoRa_Gateway/&file=LoRaWAN%201.0.3%20Regional%20Parameters.xlsx]] to see what DR means.

1625

1. The command AT+RX2FQ and AT+RX2DR is to let downlink work. to set the correct parameters, user can check the actually downlink parameters to be used. As below. Which shows the RX2FQ should use 868400000 and RX2DR should be 5

1626

1627

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image031.png]]

1.

11.

111. Change to Class A

If sensor JOINED

AT+CLASS=A

ATZ

1. FAQ

1.

11. How to upgrade the image?

1650

1651

The LT LoRaWAN Controller is shipped with a 3.5mm cable, the cable is used to upload image to LT to:

1652

1653

* Support new features

1654

* For bug fix

1655

* Change LoRaWAN bands.

1656

1657

1658

Below shows the hardware connection for how to upload an image to the LT:

1659

1660

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image029.png]]

1661

1662

1663

**Step1:** Download [[flash loader>>url:https://www.st.com/content/st_com/en/products/development-tools/software-development-tools/stm32-software-development-tools/stm32-programmers/flasher-stm32.html]].

1664

1665

**Step2**: Download the [[LT Image files>>url:http://www.dragino.com/downloads/index.php?dir=LT_LoRa_IO_Controller/LT33222-L/image/]].

1666

1667

**Step3: **Open flashloader; choose the correct COM port to update.

**For LT-33222-L**:

Hold down the PRO button and then momentarily press the RST reset button and the **DO2 led** will change from OFF to ON. When **DO2 LED** is on, it means the device is in download mode.

**For LT-22222-L**:

Hold down the PRO button and then momentarily press the RST reset button and the **DO1 led** will change from OFF to ON. When **DO1 LED** is on, it means the device is in download mode.

|(((

Board detected

)))

|(((

)))

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image032.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image033.png]]

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image034.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image035.png]]

1692

1693

1694

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image036.png]] [[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image037.png]]

1695

1696

1697

**Notice**: In case user has lost the program cable. User can hand made one from a 3.5mm cable. The pin mapping is:

1698

1699

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image038.png]]

1.

11. How to change the LoRa Frequency Bands/Region?

1704

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User can follow the introduction for [[how to upgrade image>>path:#upgrade_image]]. When download the images, choose the required image file for download.

1.

11. How to set up LT to work with Single Channel Gateway such as LG01/LG02?

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In this case, users need to set LT-33222-L to work in ABP mode & transmit in only one frequency.

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Assume we have a LG02 working in the frequency 868400000 now , below is the step.

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**Step1**: Log in TTN, Create an ABP device in the application and input the network session key (NETSKEY), app session key (APPSKEY) from the device.

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[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image039.png]]

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Note: user just need to make sure above three keys match, User can change either in TTN or Device to make then match. In TTN, NETSKEY and APPSKEY can be configured by user in setting page, but Device Addr is generated by TTN.

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**Step2: **Run AT Command to make LT work in Single frequency & ABP mode. Below is the AT commands:

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123456 Enter Password to have AT access.

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AT+FDR Reset Parameters to Factory Default, Keys Reserve

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123456 Enter Password to have AT access.

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AT+NJM=0 Set to ABP mode

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AT+ADR=0 Set the Adaptive Data Rate Off

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AT+DR=5 Set Data Rate (Set AT+DR=3 for 915 band)

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AT+TDC=60000 Set transmit interval to 60 seconds

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AT+CHS=868400000 Set transmit frequency to 868.4Mhz

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AT+DADDR=26 01 1A F1 Set Device Address to 26 01 1A F1

ATZ Reset MCU

As shown in below:

[[image:file:///C:/Users/93456/AppData/Local/Temp/msohtmlclip1/01/clip_image040.png]]

1.

11. Can I see counting event in Serial?

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User can run AT+DEBUG command to see the counting event in serial. If firmware too old and doesn’t support AT+DEBUG. User can update to latest firmware first.

1. Trouble Shooting

11. Downlink doesn’t work, how to solve it?

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Please see this link for how to debug:

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[[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#How_it_work>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#How_it_work]]

1.

11. Have trouble to upload image.

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See this link for trouble shooting:

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[[http:~~/~~/wiki.dragino.com/index.php?title=Firmware_Upgrade_Trouble_Shooting#UART_upgrade_trouble_shooting>>url:http://wiki.dragino.com/index.php?title=Firmware_Upgrade_Trouble_Shooting#UART_upgrade_trouble_shooting]]

1.

11. Why I can’t join TTN in US915 /AU915 bands?

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It might be about the channels mapping. Please see this link for detail:

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[[http:~~/~~/wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band>>url:http://wiki.dragino.com/index.php?title=LoRaWAN_Communication_Debug#Notice_of_US915.2FCN470.2FAU915_Frequency_band]]

1. Order Info

**For LT-33222-L-XXX or LT-22222-L-XXX:**

**XXX:**

* **EU433**: LT with frequency bands EU433

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* **EU868**: LT with frequency bands EU868

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* **KR920**: LT with frequency bands KR920

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* **CN470**: LT with frequency bands CN470

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* **AS923**: LT with frequency bands AS923

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* **AU915**: LT with frequency bands AU915

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* **US915**: LT with frequency bands US915

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* **IN865**: LT with frequency bands IN865

1800

* **CN779**: LT with frequency bands CN779

1. Packing Info

**Package Includes**:

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* LT I/O Controller x 1

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* Stick Antenna for LoRa RF part x 1

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* Bracket for controller x1

* Program cable x 1

**Dimension and weight**:

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* Device Size: 13.5 x 7 x 3 cm

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* Device Weight: 105g

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* Package Size / pcs : 14.5 x 8 x 5 cm

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* Weight / pcs : 170g

1. Support

* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.

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* Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to

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[[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]]

Wiki source code of LT-22222-L LoRa IO Controller User Manual

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