A Hardware Engineer is needed for the development of the electronic components of sports equipment.

Hello, I am ready to complete your project. To reduce the cost of the final product, I suggest creating it directly on the ZigBee/Bluetooth controller without the need to use a universal microcontroller (like the Atmega2560 mentioned in the specifications), and instead use a microcontroller with a built-in radio module, such as the JN5169. Also, if necessary, I can design the board, significantly improving the repeatability of your product. Considering the large number of nuances (such as - Android application, its interface, scenarios, and their configurability), I propose hourly payment instead of the specified price.

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Hello!
I have extensive experience working with microcontrollers and their modules. I have created systems of varying complexity using Arduino Uno, Arduino Leonardo, ATmega16, ATmega328P-PU, ESP32S3, ESP32P4, LilyGO T-Call SIM800H, and have developed appropriate connection schematics for various modules (RTC, LCD, SD card module, MAX485) with different connection interfaces (SPI, I2C, UART), taking into account the voltage on the module pins, ease of further connection, and compactness.
I do not see any complexity in your project.

In your project, giant and functionally limited Arduino boards are not needed. Instead, it is better to use the compact and inexpensive ESP32C3 Supermini, to which all sensors can be connected. It can be powered via USB-C or from a 5V DC power bank, power supply, etc. This microcontroller also has a built-in Wi-Fi/BLE module: it can be set up so that the ESP32C3 creates a Wi-Fi access point, and when users connect to it, they can access a website in their browser to control the microcontroller itself (thus, the microcontroller can be managed from any device that has an internet connection).

I am ready to discuss all the implementation details and costs in a private chat.

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