Mailsense32

Project Introduction

MailSense32 is a smart, ultra-low-power mailbox sensor. Based on the ESP32-DEV Kit V4, it sends instant notifications to your smartphone when mail or a package is delivered. The board is designed for a hassle-free experience: JLCPCB assembles the components, and you simply "plug and play" the main modules.

Project Features

• Opening Detection: Dedicated port for an external magnetic (Reed) sensor or limit switch.

• Connectivity: Wi-Fi notifications (Pushover, MQTT, Home Assistant, etc.).

• Zero-Solder ESP: The ESP32-DEV Kit V4 plugs directly into pre-soldered female headers. No complex soldering required.

• Extreme Battery Life: Optimized power management for months of operation on a single LiPo charge.

Project Parameters

• MCU: Support for ESP32-DEV Kit V4 module (standard pinout).

• Power: Slot for LiPo charging module and JST battery connector.

• Manufacturing: Optimized for JLCPCB PCBA service (including pre-soldered headers).
  
  

Hardware Principles

The design focuses on assembly simplicity:

1. JLCPCB Assembly: The board arrives with all passive components and female headers already mounted by the factory.

2. User Installation: Simply plug in the ESP32-DEV Kit V4 and the charging module. Orientation is clearly marked by the "USB" label on the PCB.
   

Software & Bill of Materials (BOM)

Firmware, flashing guide, and direct links to buy the ESP32 and modules can be found here:

• GitHub: https://github.com/egalistel-dev/MailSense32

• Full Article (FR): https://egamaker.be/mailsense32/

Announcements (IMPORTANT)

• Ready to Plug: JLCPCB delivers the board 90% assembled.

• Modules to buy separately: You will need to purchase:

  1. One ESP32-DEV Kit V4 module.

  2. One TP4056 charging module.

  3. One Reed sensor (magnet + switch).

• Support the Project: If you like this project, please create your JLCPCB account via this link before ordering to support my work: https://jlcpcb.com/fr/?from=egalistel

Process Assembly

1. Click "Order at JLCPCB" and select the SMT Assembly option.

2. Once received, plug the modules into the headers following the visual guides on the PCB.

3. Connect your battery and sensor.

4. Flash the firmware via the ESP32 USB port.
   

Video Tutorial

📺 Watch the step-by-step guide here: https://youtu.be/nX07irx1glA