Unable to Send POST Request to Make Webhook Using SIM7670E Module

How To
1

Hi everyone,

I’m currently working on a project using a SIM7670E module connected directly to my PC via USB. I’m sending HTTP POST requests using AT commands. When I send a request to a public endpoint like https://httpbin.org/post, the request works perfectly, and I receive the expected response.

However, when I attempt to send the same request to a Make webhook (e.g., https://hook.eu1.make.com/myEP), the request fails. I’ve ensured that my AT command sequence is identical except for the URL. The Make webhook URL seems to return an error or is unresponsive to my request.

Here’s the sequence of AT commands I’m using:

AT+HTTPINIT
AT+HTTPPARA=“URL”,“https://hook.eu1.make.com/myEP”
AT+HTTPPARA=“CONTENT”,“application/json”
AT+HTTPDATA=27,10000
{“test_key”:“test_value”}
AT+HTTPACTION=1

When I try this with https://httpbin.org/post, it works perfectly, and I get a 200 status code with the response body. But with the Make webhook URL, I receive a 715 hand shake error, and the request fails.

I’ve also confirmed connectivity to hook.eu1.make.com using the AT+CPING command, which shows that the server is reachable.

Key Questions:

  1. Are there any specific configurations or additional headers required for Make webhooks to accept POST requests from a GSM module like SIM7670E?
  2. Could the issue be related to TLS settings or the webhook’s server-side configuration?
  3. Has anyone successfully sent data to a Make webhook using a SIM7670E or similar modules, and if so, could you share the AT command sequence?

Thank you for your help!

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4

What you explain is different from what you set up :unamused::unamused::unamused:

Are you sure you are doing the right thing?

When you want to use a post action you have to use HTTPS to post a action but from what I am looking at you are using webhook. I think you don’t understand the use of webhook and HTTPS

5

Hi Emmie_Aderemi,

Thank you for your response. I understand your concern regarding the difference between using a webhook and an HTTPS POST action. Allow me to clarify my setup:

What I’m trying to do:
I’m using a SIMCom A7670E module to send a POST request to the webhook URL provided by Make.com:

https://hook.eu1.make.com/myEP

What I have done so far:
I have configured my module to send an HTTPS POST request with a JSON payload ({"test_key":"test_value"}) to this URL.

  • What works:
    When I test the same URL using Postman, it responds as expected, confirming that the webhook is functional.
  • What doesn’t work:
    When I send the request via the SIM module, I encounter a TLS handshake failure (error 715), indicating that the module is unable to establish a secure connection. I suspect the issue might be related to:
  • The TLS configuration on the module.
  • A possible misconfiguration in how the webhook expects the POST request to be structured.
  • Questions for clarification:
  • Could you confirm if there are specific headers, request formats, or requirements for posting to a Make.com webhook that might not be immediately obvious?
  • Is there a way to debug incoming requests on Make.com to verify if my module is reaching the webhook endpoint but failing due to request structure or headers?

Thank you

6

From what I could understand from what you explain and my studies there is compatibility between TLS certificate and make.com programming

The header from you Module is not working with make.com
The best option is to hire a programmer to do his job