Quectel EC200U-CNAA problem with sending json format data with more than one key value to MQTT server

IoT Modules
1

Hello,
Iam using Quectel EC200U-CNAA with firmware version of EC200UCNAA-N05-SGNSA. There is no issue when I am sending normal String and JSON format string with only one key value to MQTT server using AT+QMTPUBEX command. please find below commands and their responses.
AT+QMTPUBEX=0,1,1,0,“mqtt/topic1”,9,“hello Gsm”
[2024-07-24_12:32:59:131]OK
[2024-07-24_12:32:59:433]
[2024-07-24_12:32:59:433]+QMTPUBEX: 0,1,0
AT+QMTPUBEX=0,1,1,0,“mqtt/topic”,13,“{“Hello”:“1”}”
2024-07-24_12:35:30:430]OK
[2024-07-24_12:35:30:731]
[2024-07-24_12:35:30:731]+QMTPUBEX: 0,1,0
But iam facing issue when iam sending JSON format string with more than one key value to MQTT server. observer below command and its response.
AT+QMTPUBEX=0,1,1,0,“mqtt/topic1”,22,“{"Hi":"1","Hello":"1"}”
[2024-07-24_12:41:00:428]>
[2024-07-24_12:41:45:533]OK
[2024-07-24_12:41:45:933]
[2024-07-24_12:41:45:933]+QMTPUBEX: 0,1,0
Here after sending publish command > response came , i already gave data along with command as same as given above. but above i din’t get > response after sending command but when i gave more than one key value in json string > response coming. I want to avoid that > response , that’s why iam trying. Please give me any suggestion.

2

[quote=“Mounika, post:1, topic:36679”]
EC200UCNAAR01A04M08[/quote]

This is the firmware version EC200UCNAAR01A04M08, please give me any suggestion ASAP.

3

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image714×519 54.8 KB

run the

AT+QMTPUBEX=0,1,1,0,“mqtt/topic1”,22
then
= > {“Hi”:“1”,“Hello”:“1”}

4

Hello , Thank you for your reply. Now we are using this command only. After sending AT+QMTPUBEX command it gives > then we are sending data. But now we want to avoid > response after executing publishing command. Because of this we are trying to send data directly with command. Is this possible to send JSON format string along with AT+QMTPUBEX command?

5

According to the documentation, QMTPUBEX does not support non-data mode, which includes the data payload section at the end of the AT command

6

Thank you for your reply, yes according to documentation it is not support, but we are executing non-data mode with QMTPUBEX command. How it was working? Why it wasn’t working for JSON string with more than two key values?

7

If you are using AT+QMTPUBEX, you need to convert the JSON format string to HEX format before sending it

8

But our server need JSON string only. We are using MQTT server

9

so,you should use AT+QMTPUB,and You also need to follow the grammar of AT

10

for AT+QMTPUB also same thing happened, it also didn’t take more than one key value in JSON format string

11

I don’t think it’s possible