When the door is opened, an announcement is made over the household Alexa devices. When triggered it sends a notification via LoRaWAN to the Chipstack instance, which is monitored by the NodeRed server. Opening the door in the dark won’t trigger it, but pretty much any ambient light level that a mere human can see in the box is sufficient to trigger it. The CdS is mounted to the back of the box, and the electronics are mounted underneath. My solution uses a CdS cell, comparator, Murata CMWX1ZZABZ-078 and a single CR123A. Posted in Radio Hacks Tagged LoRa, LoRaWAN, mailbox, notification, The Things Network Post navigation Check out the video after the break to see this radio-equipped mailbox in action. Even if you have no interest in a mailbox, any tricks that can help maximize power efficiency are always worth taking a look at. The write-up also provides an introduction to extreme low power projects, including some tips on measuring such tiny currents. Finally an SDR was used to debug the operation of the radio. The sensor is simply a microswitch, selected after finding a reed switch problematic to install. This packs a low-power version of the ATmega328 microcontroller alongside a LoRa radio and an efficient power regulator allowing it to draw only 8.70 uA in standby mode, waking up only for extremely short periods to check for mail and report via LoRa to The Things Network. His solution is a LoRa-connected mailbox monitor that sips power from a pair of AAA batteries to the extent that so far it’s run for over two years on a single set.Īt its heart is a single board, a Talk2 Whisper Node. For this presents a problem: he doesn’t want to miss a parcel but most visits to the mailbox are futile. Where once each new day might have brought with it a bulging mailbox, today it’s not uncommon for days to pass with not even so much as a bill or a coupon book. Sorry I should have mentioned: This has been tested on CMSMS version 1.8.6 and version 1.As more of the world’s communication moves into the electronic realm, a casualty has come in the physical mail. I have uploaded a "how to" pdf in the AVPlayer file area. Using the MP4 file format, this has been tested to work with: IE8,Firefox 3.08, Ipad,IPod,IPhone.įor other browsers refer to. The above template is making use of the "Userdefined1" field to hold the name of the skin.
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