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Std EditionHomely WSN - Basic Board V1

License: CC-BY-SA 3.0

Published Time:2019-03-28 00:31:12
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Homely WSN Basic Board (V1) is an IoT board to collect environmental data (temperature, humidity and pressure) and to push them to a centralized server through Wi-Fi.

Main components

  • ESP8266 (ESP-12S, ESP-WROOM-2D)
  • Digital temperature and humidity sensor Sensirion SHT30
  • Digital temperature and pressure sensor Bosch BMP280
  • RTC Maxim Integrated DS3231
  • Reset and User buttons
  • Switch ON/OFF
  • Low quiescent current LDO Analog Device ADP160
  • USB-C connector for power supply


The entire board is manually assemblable, no stencil is required. Hot air gun will be necessary for BMP280 and SHT30.


You need an external USB-serial converter to upload the firmware. You may use this, designed to be pin-compatible with this board.

The firmware will be published on Github, but it still requires a bit of work.

After flashing firmware, you need you solder the SJ2 to enable deep-sleep.


  • 1.0.0 ✅: first version, I have no complain. Here you can find a 3D-printable case to protected the circuit.
  • 2.0.0 ❔: update buttons footprint; ESP12->ESP02; add JST PH 2-pin for battery; 0805->0603 package; USB sliglhy exposed; add mount hole; new logo; Errata corrige: C2 is 100nF
  • 2.0.1 ✅: fix copper area behind antenna. 3D-pritable case

Versioning conventions

Each manufactured board must have a version. Version advancements are ruled accordingly to Semantic Versioning, similarly to what usually happens in software development.

To quickly identify the status of each version, I use emojis. The following list explains their meaning:

  • A White Heavy Check Mark (✅) means that it is successfully tested;
  • A Negative Squared Cross Mark (❎) means that it was almost successfully tested (the main functionalities are fine), but there are bugs affecting minor funcionalities;
  • A Warning Sign (⚠) means that the board is not usable out of the box but the bugs are fixable in DIY (decent) fashion;
  • A Cross Mark (❌) means that there are some problems that makes it unusable;
  • A White Question Mark Ornament (❔) means not tested.

Future work:

  • Header 1.27mm for programming
  • keep 1mm of margin from the border to allow case's hooks

Basic Board

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Basic Board

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