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sslhttpssim800
Patrick Fischer
Patrick Fischer

Reputation: 51

SIM800 HTTPS 606 Error

I have been using SSL to connect a SIMCOM SIM800 GSM Module to a Microsoft Azure function endpoint. This has been working for months and has now stopped working and reports a 606 error code which indicates an "SSL alert message with a level of fatal result and the immediate termination of the connection" according to SIM800 Series_SSL_Application Note_V1.02

I tried HTTPS connections to various other sites using the SIM800 e.g. google and httpbin and got mixed results: I could connect to some e.g. google but not others e.g. httpbin. See here for a similar result.

Does anyone know if sites have recently changed SSL cipher or protocol requirements? The SIM800 module (only) supports SSL2.0, SSL3.0 and TLS1.0.

Upvotes: 4

Views: 6315

Answers (2)

Fabien Papleux
Fabien Papleux

Reputation: 21

I kept getting a 606 error while trying to 'GET' my AWS API and I could not figure this out. Reconfigured the custom domain mapping to use TLS1.0 instead of TLS1.2 and communication is now flowing through.

Upvotes: 0

a.akizu
a.akizu

Reputation: 1

I'm using a SIM808 (V2 / R14.18) to make some GET requests to HTTPS endpoints such a https://www.google.com and a personal Azure website. I get successful answers from google but from Azure, even if change the "Minimum TLS version" I'm always having a 606 answer. Azure website's SSL Configuration

So, I'm not sure if my SIM808 does really support TLS1.0. Maybe your SIM800 does (documentation is quite confusing).

Upvotes: 0

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