Https Big file download issue

IoT Modules Legacy HL Series
1

Hi,

I am using HILO NCV2 GSM modem.
Whenever i try to send very big file about 2.3 MB through UART to a https server,modem is not able to send this huge data.
How to resolve this issue ? What could be the problem ?
How much data modem can buffer at a time ?
More over how to use CTS and RTS lines for data tranmission ?

Thanks & Regards
vineet

2

Moreover if i send very small data like 4K bytes to the https server ,after the successful deliver of data and reponse why --EOF–Pattern-- takes time to come from the modem side

3

Hello,

Flow control is needed to handle big files.
CTS/RTS can be used for hardware flow control.
Please refer to the AT&K command for more details.

For your second question :
Usually the server will send a response to the module and then the module will send “OK” to the user application.
Please share the AT commands log?

Thanks

4

Thanks for the reply
Don’t know why --EOF–Pattern-- comes with long detail even though server has send the response.
Please find the AT logs below :

AT

OK
AT&K3

OK
AT+KCNXCFG=0,“GPRS”,“airtelgprs.com”,"",""

OK
AT+KCNXPROFILE=0

OK
AT+CGATT=1

OK
AT+KHTTPSCFG=0,“some ip”,“some port”,0,0, 1

+KHTTPSCFG: 0

OK
AT+KHTTPSHEADER=0

CONNECT

OK
AT+KHTTPSPOST=0, “some url”

CONNECT
Data through serial port…

Some response from server that data received.
After this --EOF–Pattern-- takes long time to come (almost more than 40 sec)

5

Hi,

It depends on the website.
The module has to wait for the END response from the website, and then send the “–EOF–Pattern–” indication.

Thanks