Device that sends an HTTP request when the state of the contact changes

Embedded Systems & Microcontrollers — incorrectly specified categories?

22 USD

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A compact device needs to be developed that monitors a dry contact and sends an HTTP request to the specified URL upon any change in its state (closing or opening).

Requirements:

Input: dry contact (closed / open)
Triggering on both events: closing and opening
Sending HTTP POST or GET to the specified URL
Operation in a local Ethernet network
Auto-start after power is supplied
Stable operation 24/7

Output needed:

Ready device or fully reproducible schematic
Firmware
Short connection instruction

Note:
The choice of components and implementation method is at the discretion of the performer.

Proposals 5 Rejected 2 Discussions 1

Serhii Ilin

6 0

Budget: 1500 UAH Deadline: 2 days

Hello!
I have significant experience in developing for the ecosystems of Espressif, Arduino, Atmel: I have closely worked with ESP32-S3, ESP32-P4, LilyGo T-Call, Arduino Leonardo, Arduino Nano, ATmega16, ATmega328P-PU, successfully completing commercial projects by writing reliable firmware directly on ESP-IDF.

Your task regarding the dry contact tracking is quite clear and can be implemented fairly quickly, but I have one important clarification regarding the hardware part. Please let me know if the use of Ethernet is a critical and integral requirement for your object, or if we can limit ourselves to setting up a stable Wi-Fi connection, for example, through the built-in Wi-Fi module of the ESP microcontroller, which would allow us to make the device more compact and cheaper? If a wired connection is essential for guaranteed operation 24/7, I can easily implement this based on ready-made and tested boards like WT32-ETH01 or solutions with PoE support, so that the network and power go through one cable.

I would be happy to discuss the details and promptly start the development.

Sergey Ryabko

0 0

Projects -
Rating -
Rating 274

Budget: 1000 UAH Deadline: 3 days

Good day. The technical specification is clear, but there is a clarification regarding the availability of the router. This will affect the simplification of the component base. I have experience in creating similar solutions.

Yana Rudenko

2 0

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Rating 226

Budget: 1200 UAH Deadline: 3 days

Good day, I have experience in creating complex devices, so I will manage this if it is a precise technical specification.
Question: Do I need to respond to the feedback signal from the server in any way? Will the power supply be constant? What will be the approximate frequency of closing and opening?

The answers will help me understand the project itself and execute it with sufficient quality.

The price and time can be agreed upon additionally.
Feel free to contact me!