Dragino LT Series User Manual

www.dragino.com
LT Series LoRa IO controller User Manual 14 / 42
 [0] DO3 channel output state
 DO3 is float in case no load between DO3 and V+.;
 DO3 is high in case there is load between DO3 and V+.
 DO3 LED is off in both case
 [1] DO2 channel output is low and DO2 LED is ON.
 [0] DO1 channel output state
 DO1 is float in case no load between DO1 and V+.;
 DO1 is high in case there is load between DO1 and V+.
 DO1 LED is off in both case
3.3.2 AT+MOD=2, (Double DI Counting)
For LT-33222-L: this mode the DI3 is used as a counting pin. Counting on DI3 reflect in COUNT1.
For LT-22222-L: this mode the DI1 and DI2 are used as counting pins.
Total : 11 bytes payload
Size(bytes)
4
4
1
1
1
Value
COUNT1
COUNT2
DIDORO*
Reserve
MOD
DIDORO is a combination for RO1, RO2, DO3, DO2 and DO1. Totally 1bytes as below
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
RO1
RO2
FIRST
Reserve
Reserve
DO3
DO2
DO1
 RO is for relay. ROx=1 : close，ROx=0 always open.
 FIRST: Indicate this is the first packet after join network.
 DO is for reverse digital output. DOx=1: output low, DOx=0: high or float.
Note: DO3 bit is not valid for LT-22222-L.
To use counting mode, please run:
AT+MOD=2
ATZ
AT Commands for counting:
For LT33222-L:
AT+TRIG=0,100, 3 (set DI3 port to trigger on low level, valid signal is 100ms)
AT+TRIG=1,100, 3 (set DI3 port to trigger on high level, valid signal is 100ms )
AT+SETCNT=1,60 (Set COUNT1 value to 60)
For LT22222-L:
AT+TRIG=0,100, 1 (set DI1 port to trigger on low level, valid signal is 100ms)
AT+TRIG=1,100, 1 (set DI1 port to trigger on high level, valid signal is 100ms )

Dragino LT Series Specifications

General

Brand	Dragino
Model	LT Series
Category	Controller
Language	English