BLYNK
HOME       📲 GETTING STARTED       📗 DOCS       ❓HELP CENTER       👉 SKETCH BUILDER

SIM card issue - no SSL

arduino
sim900
#1

Arduino Uno + SIM900
Software serial connection


Background:

Hi - I made a thread the other day about not being able to connect to the blynk server. After the modem init, it would just keep repeating:

connecting to "blynk-cloud.com:80"

without ever connecting. I couldn’t get it to work, so I went back and learned all about AT commands and whatnot, then ran them through the monitor to try to set everything manually to make http requests via gprs.

I found that my SIM card (Telcel, Mexico) does not have SSL. As in, if I do the command AT+HTTPSSL=?, I am returned this:

+HTTPSSL: (0-1)

It’s my understanding that it should just say HTTPSSL: 1 if it’s equipped. I tested it out by running a regular HTTP connection and receiving packages successfully, then an HTTPS and getting a 601 error.


Question:

Is it possible that the reason I can’t make a GSM connection with the blynk-cloud is because my SIM card doesn’t allow SSL connections? Is there any way around this?

0 Likes

#2

SIM card has nothing to do with SSL. This is SIM900 that does not have SSL support.

0 Likes