Dragino LT Series User Manual

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LT Series LoRa IO controller User Manual 13 / 42
3.3 Uplink Payload
There are five working modes on LT for different type application:
 MOD1: (default setting): 2 x ACI + 2AVI + DI + DO + RO
 MOD2: Double DI Counting + DO + RO
 MOD3: Single DI Counting + 2 x ACI + DO + RO
 MOD4: Single DI Counting + 1 x Voltage Counting + DO + RO
 MOD5: Single DI Counting + 2 x AVI + 1 x ACI + DO + RO
3.3.1 AT+MOD=1, 2ACI+2AVI
The uplink payload includes totally 9 bytes. Uplink packets use FPORT=2 and every 10 minutes
send one uplink by default.
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
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
RO1
RO2
DI3
DI2
DI1
DO3
DO2
DO1
 RO is for relay. ROx=1 : close，ROx=0 always open.
 DI is for digital input. DIx=1: high or float, DIx=0: low.
 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
Note: DI3 and DO3 bit are not valid for LT-22222-L
For example if payload is: 04 AB 04 AC 13 10 13 00 AA FF 01
The value for the interface is:
AVI1 channel voltage is 0x04AB/1000=1195（DEC）/1000=1.195V
AVI2 channel voltage is 0x04AC/1000=1.196V
ACI1 channel current is 0x1310/1000=4.880mA
ACI2 channel current is 0x1300/1000=4.864mA
The last byte 0xAA= 10101010(B) means 
 [1] RO1 relay channel is close and the RO1 LED is ON.
 [0] RO2 relay channel is open and RO2 LED is OFF;
LT33222-L:
 [1] DI3 channel is high input and DI3 LED is OFF;
 [0] DI2 channel is low input;
 [1] DI1 channel is high input and DI1 LED is OFF;
LT22222-L:
 [1] DI2 channel is high input and DI2 LED is ON;
 [0] DI1 channel is low input;

Dragino LT Series Specifications

General

Brand	Dragino
Model	LT Series
Category	Controller
Language	English