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STD Homely WSN - Basic Board V1

License: CC-BY-SA 3.0

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Creation time: 2019-03-27 16:31:12
Update time: 2023-04-29 20:27:28
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 ## Assembling The entire board is manually assemblable, no stencil is required. Hot air gun will be necessary for BMP280 and SHT30. ## Usage You need an external USB-serial converter to upload the firmware. You may use [this](https://easyeda.com/fabiano.riccardi/esp8266-programmer), 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. ## Changelog - 1.0.0 ✅: first version, I have no complain. [Here](https://www.thingiverse.com/thing:4573333) 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](https://www.thingiverse.com/thing:4878599) - 2.0.2 ✅: improve placement of de-coupling cpacitors; improve placement of other components; use longer USB-C connector ### 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
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