Ebyte E78-470LN22S User Manual page 22

Chengdu Ebyte Electronic Technology Co.,Ltd.
Example
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ERR+SENT message. During this period, if the transmission of the
response message is received, it is successful and the OK+SEND,
OK+SENT and OK+RECV messages are output.
Unconfirm type data:
The downlink response will not be requested after the data is sent, and the
OK+SEND, OK+SENT message will be returned at the end of each
transmission. If the downlink data is received, the OK+RECV message is
sent.
2、Data sending status prompt
OK+SEND: TX_LEN indicates that the data transmission request was
successful, TX_LEN: 1Byte, the length of the transmitted data
OK+SENT: TX_CNT indicates that the data transmission was successful,
TX_CNT: 1Byte, the number of data transmissions.
ERR+SEND: ERR_NUM indicates that the data transmission request failed
for the reason indicated by ERR_NUM.
ERR_NUM： 1 Byte，
0- Not in the network
1- Communication is busy, sending request failed
2- The data length exceeds the current transmittable length, and only the
MAC command is sent.
ERR+SENT: TX_CNT indicates that the data transmission failed, the
maximum number of transmissions has been reached, TX_CNT: 1 Byte,
and the number of data transmissions.
OK+RECV:TYPE,PORT,LEN,DATA Successful data reception (received
response message or active downlink data)
TYPE： 1Byte，downstream transmission type
Bit0： 0-unconfirm， 1-confirm
Bit1： 0-not ACK， 1-ACK
Bit2：0-not carried, 1-carried, indicating whether link command response is
carried in downlink data
Bit30-not carried, 1-carried, indicating whether time command response is
carried in downstream data. Only when this bit is 1, time synchronization is
successful
Bit4~Bit7：default 0, reserved
PORT： 1Byte，downstream transmission port
LEN： 1Byte，downstream data length
DATA： nByte，downstream data，When len = 0, this field does not exist.
AT+DTRX=1,2,10,0123456789
OK+SEND:03
OK+SENT:01
OK+RECV:02,01,00
Indicates that the confirm data is sent successfully. The valid data received
by the server should be "0123456789", and the downstream confirmation
has been received.
E78-470LN22S User Manual
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