TrigBoard – Ultra low power ESP8266 IoT platform

TrigBoard – Ultra low power ESP8266 IoT platform

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The trigBoard is an IoT project that does one thing – it pushes you a notification triggered by a digital input. Well, it’s much more than that, but this is the inspiration. I wanted to design a WiFi board that essentially sleeps most of its life, but when that door switch, flood sensor, motion sensor, etc.. gets triggered, I just want a notification immediately on my phone. And that’s about it… a perfect IoT device in the background doing its job.

Features

  • Simple IoT development board that was designed to trigger “Push Notifications” on a smart phone/tablet based on a trigger event.
  • Unique low-power front-end to enable sub 1uA sleep current – uses a pulse to trigger wake-up, so even if door/window/etc is opened, the same ultra low currents can be maintained. Compare to standard pull-up/down resistor based digital input designs with significantly higher leakage current.
  • The board will wake itself up once an hour to check the battery voltage – if running low, a push notification is sent to warn the user. This timer can be used to check other things as well – temperature changes, accelerometers, or other environmental sensors.
  • Based on ESP8266 WiFi Module (ESP-12S) – all source code is available for download and developed in the popular Arduino IDE.
  • Battery Input can be any Lithium Polymer 3.7V – standard micro JST connector jack is used (please double check polarity),any of these would work nicely.
  • Sensor input to trigger the “Wake Up” is a simple passive switch. Typically a standard magnetic door/window switch is used and the board can be configured to wake on the “opening” (Normally Closed) or “closure” (Normally Open) of the contact. Solder jumpers set this – Normally Closed is Default, so standard door/window switches wake the board up when opened.
  • Battery Charging On-Board via MicroUSB – set for 4.2V at 500mA. 5V input pads broken out for energy harvesting experimentation.
  • Dimensions only 0.8″ x 1.6 ” (20.32mm x 40.64mm)

The board is currently on sale on Tindie for $20.

Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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