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Chengdu Ebyte Electronic Technology Co., Ltd.
set comman
d
Parameter D
escription
Return valu
e descriptio
n
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AT+DTRX=[confirm],
[nbtrials],<Length>,
<Payload>
OK+SEND:TX_LEN
OK+SENT:TX_CN
For confirm and nbtrials, please refer to the corresponding AT co
mmand, which is only valid for this transmission, optional.
Length: Indicates the number of strings; the maximum value is sh
own in the access specification; the length of bytes allowed to be
transmitted at different rates is different (see the LoRaWan proto
col for details), 0 means sending empty data packets.
Payload: Hexadecimal (2 characters represent 1 number);
return value:
1. How to judge whether the data transmission is successful?
Confirm type data:
Each time a frame of data is sent, there should be a correspondin
g response message. When the module times out and does not re
ceive a response message, if the maximum number of times is no
t reached, it will retry again, until the maximum number of times
is reached and no downlink message is received, it is a failure,
and output
ERR+SENT message. During this period, if the completion of the
transmission of the response message is received, it is successful,
and the OK+SEND, OK+SENT and OK+RECV messages are out
put.
Unconfirm type data:
No downlink response is requested after data is sent, and OK+SE
ND and OK+SENT messages are returned at the end of each tran
smission. If the downlink data is received, the OK+RECV messag
E78-DTU(470LN22) User Manual
OK
OK+SEND:TX_LEN
OK+SENT:TX_CNT
OK+RECV:TYPE,PORT,LEN,DATA
or
ERR+SEND:ERR_NUM
ERR+SENT:TX_CNT
33
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