HL7812 exits data mode and returns to AT mode

IoT Modules HL78
1

Hi,

I sent the at+gnssnmea=4,1000,0,1 command, and the module responded “CONNECT” to enter data mode.
But I can’t exit data mode by sending “++++”.
It’s stuck here.
Does anyone know how to exit data mode?

Best Regards,
Jerry Li

2

I don’t see problem

ati3
HL7812.5.4.10.0

OK
at
OK
at+gnssnmea=4,1000,0,1

CONNECT

OK

are we using same FW?
Did you add some guard time before sending the +++?

3

Hi @jyijyi

FW is not the same version.
I waited for more than 1 second before sending +++, and the result was stuck here, as shown below.
image

4

did you try the same FW as my test?

5

Same result.
Is there anything I should pay attention to? Or how to operate it?
image

6

are you using UART1?
are you using the HL dev kit?
are you using baud rate 115200?

7

We use UART 1 and USB and the result is the same, stuck here.
We used DevKit for testing, the baud rate we tried 115200 and 51200 but nothing changed

8

have you used an oscilloscope to check whether the “+++” is really sent out from the host?
Is it the same result to use tera term?