RatGDO-OpenSource-D1Mini-ESP8266
About the RatGDO-OpenSource-D1Mini-ESP8266 PCB
RatGDO-OpenSource-D1Mini-ESP8266 is an open source ESP8266 PCB design by scottdube, published on GitHub under the MIT license. It is a 2-layer board measuring 47.8 × 63.3 mm, with 12 components from 8 distinct parts.
Its main chip is the WeMos_D1_mini, from the ESP8266 family. By type, the board carries 6 resistors, 3 connectors, 2 transistors and 1 IC.
It belongs with the iot & wireless, power & battery and sensors designs in this gallery.
From the project
DIY local Security+ 2.0 garage control for Home Assistant — my rat-ratgdo (D1 Mini ESP32) variant: on-board LM2596, battery-backup tap, SHT3x temp/humidity, and a piezo buzzer.
I started from Kaldek's D1 Mini – ESP32 variant and added four things aimed at making the board a self-sufficient, locally-controlled garage controller that keeps working through a power outage:
- SHT3x temp/humidity sensor (I²C, addr 0x44, SDA GPIO18 / SCL GPIO19). Garage climate in Home Assistant for free — freeze/heat alerts, humidity logging — with no second device. Brought out on a JST header to a remote breakout so the sensor isn't skewed by board or enclosure heat. - 12 V piezo buzzer driver (2N7002 on GPIO17). Local audible feedback — door-left-open nag, closing warning — that…
Main components on the RatGDO-OpenSource-D1Mini-ESP8266
RatGDO-OpenSource-D1Mini-ESP8266 bill of materials (BOM)
12 components, 8 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | WeMos_D1_mini | WEMOS_D1_mini_light | U1 |
| 1 | 2N7002 | SOT-23_Handsoldering | Q1 |
| 1 | AO3400A | SOT-23_Handsoldering | Q2 |
| 1 | Screw_Terminal_01x03 | TerminalBlock_Phoenix_MKDS-1,5-3_1x03_P5.00mm_Horizontal | J1 |
| 1 | Screw_Terminal_01x03 | PhoenixContact_MCV_1,5_3-G-3.5_1x03_P3.50mm_Vertical | J2 |
| 1 | Screw_Terminal_01x03 | PinHeader_1x03_P2.54mm_Vertical | J3 |
| 5 | 10k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R5, R6 |
| 1 | 1k | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
RatGDO-OpenSource-D1Mini-ESP8266 design files
The KiCad project lives in the scottdube/my-rat-ratgdo repository on GitHub; these links point at the commit this page was built from.
RatGDO-OpenSource-D1Mini-ESP8266: common questions
What microcontroller does the RatGDO-OpenSource-D1Mini-ESP8266 use?
The RatGDO-OpenSource-D1Mini-ESP8266 is built around the WeMos_D1_mini, from the ESP8266 family.
How big is the RatGDO-OpenSource-D1Mini-ESP8266 PCB?
The RatGDO-OpenSource-D1Mini-ESP8266 measures 47.8 × 63.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the RatGDO-OpenSource-D1Mini-ESP8266?
12 components, from 8 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the RatGDO-OpenSource-D1Mini-ESP8266 design files?
From the scottdube/my-rat-ratgdo repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the RatGDO-OpenSource-D1Mini-ESP8266 design in my own project?
Yes, under the terms of its MIT license, which scottdube chose for the repository.
Can I test firmware for the RatGDO-OpenSource-D1Mini-ESP8266 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP8266 firmware against it before you order a PCB.
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