2 layers40 × 30 mm
Esphome xiao base
0rax/esphome-xiao-base
XIAO base board PCB & configuration for ESPHome based sensors.
10 parts5CERN-OHL-S-2.0
4 layers81.8 × 60.4 mm
A custom PCB uninterruptible power supply and network diagnostic node using ESP32-C3.
- Size
- 81.8 × 60.4 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 19
- Nets
- 26
- Pads
- 64
- Tracks, vias
- 56, 0
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 15 Aug 2026
- Updated
- 1 Sep 2026
Overview
WIFI UPS is an open-source printed circuit board by HarshBotre, from the HarshBotre/IoT-Enabled-WiFi-Router-UPS repository on GitHub. It is a 4-layer board of 81.8 × 60.4 mm with 19 parts on 26 nets, routed with 56 tracks and 0 vias.
It is built around the MP1584EN and XIAO ESP32C3. Its parts include 5 diodes, 4 resistors, 4 ICs, 2 capacitors and 2 connectors. It belongs with the radio and wireless and power boards and the ESP32 and RISC-V boards of this library.
Main components
2README
README.mdIoT Smart WiFi UPS & Network Monitor
A custom 2-layer PCB designed to provide seamless battery backup for a 12V WiFi router, featuring an onboard ESP32-C3 microcontroller for live network health diagnostics and battery telemetry.
The Core Problem
Standard router UPS devices blindly supply power. When the internet drops, users cannot tell if the ISP went down or if the local router lost power. This project solves that by maintaining power while actively pinging external DNS servers to log true ISP outages.
Hardware Architecture
- Microcontroller: Seeed Studio XIAO ESP32-C3
- Power Path: Seamless OR-ing logic via 1N5822 Schottky diodes
- Battery Management: TP4056 with DW01A protection IC and 3x 18650 Lithium-ion cells in parallel
- Voltage Regulation: MP1584EN (Buck) stepping down to 5V; XL6009 (Boost) stepping up to 12V
- PCB Design: Fully routed DRC-compliant 2-layer board designed in KiCad
Software & Telemetry
- Battery Monitoring: ESP32 ADC reads battery percentage via a 100kΩ/33kΩ voltage divider.
- Network Diagnostics: Continuous ICMP ping sweeps to
8.8.8.8to track latency, jitter, and packet loss. - Dashboard Integration: Designed to push state changes to a live web browser interface.
Repository Structure
/Hardware: KiCad schematic, PCB layout, and manufacturing Gerbers./Firmware: C++ logic for the ESP32-C3 network and battery telemetry./Docs: Schematic PDFs and visual assets.
Parts
19| Qty | Value | Footprint | References |
|---|---|---|---|
| 3 | 1N5822 | Diode_THT:D_DO-201AD_P15.24mm_Horizontal | D1, D2, D3 |
| 2 | 220 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R1, R2 |
| 2 | LED | LED_THT:LED_D3.0mm | D4, D5 |
| 1 | 100 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R3 |
| 1 | 100 | Capacitor_THT:C_Disc_D5.0mm_W2.5mm_P2.50mm | C1 |
| 1 | 33 | Resistor_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P7.62mm_Horizontal | R4 |
| 1 | 470 C_Polarized | Capacitor_THT:CP_Radial_D6.3mm_P2.50mm | C2 |
| 1 | Battery | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | BT1 |
| 1 | F Barrel-Jack | Connector_BarrelJack:BarrelJack_Horizontal | J1 |
| 1 | Fuse | Fuse:Fuseholder_Cylinder-5x20mm_Schurter_0031_8201_Horizontal_Open | F1 |
| 1 | KL6009 | misc_footprints:XL6009_module | U3 |
| 1 | MP1584EN | misc_footprints:MP1584_buck_module | U4 |
| 1 | Screw_Terminal_01x02 | TerminalBlock:TerminalBlock_MaiXu_MX126-5.0-02P_1x02_P5.00mm | J2 |
| 1 | TP4056_MICRO-USB_CHARGER_-_1A | TP4056_MICRO-USB_CHARGER_-_1A:MODULE_TP4056_MICRO-USB_CHARGER_-_1A | U2 |
| 1 | XIAO_ESP32C3 | XIAO_ESP32C3:MODULE_XIAO_ESP32C3 | U1 |
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Questions
How big is the WIFI UPS PCB?
It measures 81.8 × 60.4 mm and has 4 copper layers, 1.6 mm thick.
What parts does the WIFI UPS use?
19 parts, built around the MP1584EN and XIAO ESP32C3. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the WIFI UPS KiCad files?
From the HarshBotre/IoT-Enabled-WiFi-Router-UPS repository on GitHub, at the commit this page was made from: the board is Hardware/WIFI UPS.kicad_pcb and its schematic Hardware/WIFI UPS.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the WIFI UPS design in my own project?
Its repository states no licence, so its author keeps all rights: ask HarshBotre before reusing the design.