Problem with AT+QMTCFG command on EG912U

IoT Modules LTE Standard Module
1

Hello,

as per subject we are using on a EG912U-GL module the following command MQTT AT command

**AT+QMTCFG=“willex”,1,1,1,0,

and when sending the following will message:

[1, 0, 0, 0x30, 0x31, 0, 0, 0]

the second character is interpreted (I guess) as “null” i.e. “end of the string” and no other byte of the payload is transmitted, even though the will_len has been set to 8 bytes.

We would need to ability to send both ascii and binary data byte in the will message. We are on firwmare version:

FW 01.300 .01.300

Is this behavior a limitation of this firmware?
Any chance to send the will message also in binary format when specifing the will_len?

Thanks in advance

Best regards

GIulio

2

The “will” message should currently only support string format.

3

Hello Herbert,

thanks for your feedback. I understand that this firmware only supports “will” message in string format.

But according to MQTT V5 there should be a payload format indicator, so I suppose that the MQTT implemented in this firmware must be an older version.

We are planning to update the module to a firmware compliant with the new RED Certification.

Do you know if the binary format for “Will” messages will be made available in future firmware versions?

Thanks

Giulio

4

There is currently no development plan for the binary format.