Ebyte E78-DTU - Page 28

Copyright©2012–2023, Chengdu Ebyte Electronic Technology Co., Ltd.
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OK+SEND: TX_LEN means the data sending request is successful,
TX_LEN: 1Byte, the length of the sent data
OK+SENT: TX_CNT means the data is sent successfully, TX_CNT:
1Byte, the number of times the data is sent.
ERR+SEND:ERR_NUM indicates that the data sending request failed,
and the reason is indicated by ERR_NUM. ERR_NUM: 1Byte,
0- not connected to the network
1- Communication is busy, sending request failed
2- The data length exceeds the current sendable length, only send the
MAC command
ERR+SENT: TX_CNT means that the data transmission failed, and the
number of transmissions reached the maximum number, TX_CNT:
1Byte, the number of data transmissions.
OK+RECV: TYPE, PORT, LEN, DATA data received successfully
(received response message or active downlink data)
TYPE: 1Byte, downlink transmission type
Bit0 : 0-unconfirm, 1-confirm
Bit1: 0-not ACK, 1-ACK
Bit2: 0-not carried, 1-carried, indicating whether the LINK command
response is carried in the downlink data
Bit3: 0-not carried, 1-carried, indicating whether the TIME command
response is carried in the downlink data, only when the bit is 1, it means
that the time synchronization is successful
Bit4~Bit7: Default 0, reserved
PORT: 1Byte, downlink transmission port
LEN: 1Byte, downlink data length
DATA: nByte, downlink data, when LEN=0, this field does not exist.
example
AT+DTRX=1,2,10,0123456789
OK+SEND:03
OK+SENT:01
OK+RECV:02,01,00
means the confirm data is sent successfully, the valid data received by the server
should be " 0123456789 " , and Downlink acknowledgment received.
Precautions
First access the network, then send data
command
character
command
type
command format
response
DRX
( receive data )
test
command
AT+DRX=?
+DRX:<Length>,<Payload>
OK
query
command
AT+DRX?
+DRX:<Length>,<Payload>
OK
Parameter
Description
Return value:
Length: 0 means empty data packet;
Payload: hexadecimal string data;
Return value