If you would like to be notified when letters lands in the mailbox outside your house. You may be interested in this easy to build Raspberry Pi mailbox smartphone notification system created by Martin Hubáček and kindly published to the Hackster.io website. Classed as an easy project, Martin explains the project takes less than two hours to build and uses a Raspberry Pi 3 Model B+ mini PC combined with a BigClown Core Module, mini battery module and sensor module.
Martin explained a little more about the inspiration behind the smartphone notification system. “This completely turns around the frustration of not having the mail when you every day check your mailbox into an instant joy when you get notification and you can be sure something was delivered to you ? This solution is wireless and low-power, so you need just attach it into your mailbox. Also with sensitive 868/915 MHz radio with FSK modulation if can communicate even through the metal box!”
Once built the mailbox notification system is capable of running for up to 2 years on battery power thanks to its low-power design. The BigClown Core Module opposite easy way to create wireless, battery-operated, IoT devices in minutes and is an open-source ecosystem of hardware modules and easy-to-use software tools.
Specifications of the BigClown Core Module include :
ARM Cortex M0+ 32-bit MCU STM32L083CZ (ST)
192 kB Flash / 20 kB RAM
Radio module (868/915 MHz) based on SPIRIT1 (ST)
Security chip ATSHA204A (Microchip)
Digital temperature sensor TMP112 (TI)
3-axis accelerometer LIS2DH12 (ST)
Red color LED
Push button RESET and BOOT (BOOT is available to MCU)
Easily programmable via USB (DFU bootloader)
10-pin SWD connector for debugging
Micro-USB for host communication and/or power
18x GPIO (completely free for application)
3x UART, 2x I²C, 1x SPI, 5x ADC, 2x DAC
Deep sleep mode: < 5 µA
Operating voltage range: 2.0 V to 3.6 V
Operating temperature range: -20 to 70 °C
Mechanical dimensions: 33 x 55 mm
Source:Â Raspberry Pi snail mail delivery notification project
