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I've been trying to make this SIM5320A module send HTTP requests to my server but even though it appears connected to the internet I can't seem to ping any server or make any requests.

I'm sending AT commands through a terminal on my Linux PC.

AT+CPIN appears READY

I've configured through the AT+CGDCONT, AT+SOCKSETPN = 1 and AT+CGSOCKCONT commands, adding my service provider's APN.

AT+NETOPEN returns OK. Running it again returns Network is already opened.

AT+CPSI? show's that it's connected to the WCDMA network and is online.

AT+IPADDR throws a proper IPv4 address.

So I'm trying to do AT+CPING="google.com",1 but it just won't connect.

I've even been able of sending a SMS and reading GPS coordinates, just failing in the internet stuff.

Am I missing any configuration steps? There is so little information online on this device.

Arcaniaco
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Hayk Darbinyan
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  • Does AT+CPING give any kind of message back to you? It may not know how to resolve names. Not sure how it would know what DNS server to use unless you configure it. Not sure you can do that at the modem level. Maybe try a hard coded IP address first. – lurker May 28 '21 at 17:44
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    AT+CPING tries to ping 4 times and returns unsuccesful each time. According to the datasheet passing a domain name should be fine, but I'll try a hard coded IP address too. – Hayk Darbinyan May 28 '21 at 19:07

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