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cURL in S7 1500

12/18/2022 5:46 AM	Rate (0)
DHINAKARAN Experienced Member Joined: 10/25/2011 Last visit: 8/23/2025 Posts: 41 Rating: (0)	Hi Experts, I am using S7 1500 (6ES7511-AK02-0AB0) v2.9 and API Server working on cURL command(HTTPS). Server handles cURL POST and cURL GET Request with Authorization Token, Content Type, username and password How to compose data buffer for using command TSEND.

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12/19/2022 7:13 AM	Rate (0)
Stefan Arcularius Platinum Expert Joined: 1/21/2013 Last visit: 8/29/2025 Posts: 4087 Rating: (633)	Hi DHINAKARAN, take a look at LHTTP out of "Libraries for Communication for SIMATIC Controllers". Kind regards Stefan

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12/19/2022 1:12 PM	Rate (0)
DHINAKARAN Experienced Member Joined: 10/25/2011 Last visit: 8/23/2025 Posts: 41 Rating: (0)	Hi Stefan, I am using that LHHTP library, http get request works fine But https throws error 80E1 in TCON I configured the TLS for https as mentioned in library I connected S7 1500 plc to internet through router
	Last edited by: DHINAKARAN at: 12/19/2022 13:15:17 Last edited by: DHINAKARAN at: 12/19/2022 13:16:40
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12/22/2022 7:21 PM	Rate (0)
Stefan Arcularius Platinum Expert Joined: 1/21/2013 Last visit: 8/29/2025 Posts: 4087 Rating: (633)	Hi DHINAKARAN, it is not easy to solve TLS problems by writing alone. Your error code says that you have problems with the TLS handshake. Here are some - hopefully useful - hints: Did you download the hardware configuration after making some changes to the certificate store? Are you addessing the right certificate? You have to use the servers certifacate not the certificate for your CPU. Do you know the used TLS version? Kind regards Stefan

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