2 layers148.3 × 127.5 mm
ISLKey
ISLKey/islkey
ISLKey access-control platform — ESP32 firmware, Electron flasher, Flutter app, KiCad schematic (ISL Technologies)
47 parts
2 layers60 × 60 mm
ISLKey Mini
ISLKey/islkeyISLKey access-control platform — ESP32 firmware, Electron flasher, Flutter app, KiCad schematic (ISL Technologies)
- Size
- 60 × 60 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 26
- Nets
- 19
- Pads
- 85
- Tracks, vias
- 171, 4
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 6 Jul 2026
- Updated
- 30 Jul 2026
Overview
ISLKey Mini is an open-source printed circuit board by ISLKey, from the ISLKey/islkey repository on GitHub. It is a 2-layer board of 60 × 60 mm with 26 parts on 19 nets, routed with 171 tracks and 4 vias.
It is built around the AP63203WU, ABS10 and MMBT2222A. Its parts include 6 capacitors, 6 resistors, 3 diodes, 3 connectors and 1 IC.
Main components
3
AP63203WU
TSOT-23-6-40℃~+85℃@(TA) 1 1.1MHz 22uA 2A 3.3V 3.8V~32V Buck Built-in Fixed Overcurrent Protection、Light load efficient mode、Cycle-by-cycle current limiting、Hiccup current limiting、EMI optimization (spread spectrum) Step-down type Yes TSOT-23-6 DC-DC Converters ROHSDiodes IncorporatedDC-DC Converters
ABS10
ABS-55℃~+150℃ 10uA@1000V 1A 1V@400mA 1kV 30A Single-Phase Rectifier ABS Bridge Rectifiers ROHSBORNBridge Rectifiers
MMBT2222A
SOT-23-55℃~+150℃ 1 NPN 100 100nA 1V 300MHz 300mW 40V 600mA 6V NPN Standalone SOT-23 Bipolar (BJT) ROHShongjiachengBipolar (BJT)
README
README.mdISLKey
Access-control platform by ISL Technologies — ESP32-based door controllers with a Windows flasher/commissioning tool and a companion mobile app.
Repository layout
| Path | What it is | Stack |
|---|---|---|
islkey-firmware/ | Door-controller firmware — 4 board targets (relay-board, devkit, ttgo, wt32-eth01). Inputs (exit/door/fire/tamper), relay-driven lock, cloud HMAC device-auth, NimBLE. | ESP32 / PlatformIO / Arduino |
islkey-flasher/ | Desktop flasher + serial commissioning tool. Flashes merged full-flash images at 0x0, assigns serials, writes WiFi/API config over serial. | Electron / Node.js |
islkey-app/ | Companion door-access mobile app (NFC tap → resolve → unlock). | Flutter |
kicad/ | KiCad 8 schematic for the TTGO controller (inputs, relay lock output, monitored fire link, backup power). | KiCad |
wordpress/ | Drop-in integration notes for the isl-key WordPress plugin (device API / provisioning). | — |
make_wiring_diagram.py | Generates the 4-sheet wiring/pinout PDF (ISLKey-Wiring-Diagram.pdf). | Python / matplotlib |
make_kicad_schematic.py | Generates kicad/ISLKey.kicad_sch from source. | Python |
Building
- Firmware:
cd islkey-firmware && python -m platformio run(per-env inplatformio.ini). After a rebuild, regenerate the merged images withesptool merge_bin(see below) — the flasher writes a merged full-flash image at0x0; a raw app image boot-loops the board. - Flasher:
cd islkey-flasher && npm install && npm start(ornpm run buildfor the installer). - App:
cd islkey-app && flutter pub get && flutter run.
Hardware notes
- On the TTGO T-Display target the TFT occupies GPIO 4/5/16/18/19/23, so door I/O is remapped: inputs GPIO 13/25/26/27, relays GPIO 32/33.
- The lock is switched via an external opto-isolated relay module (COM/NC), with a
single volt-free fire N/C contact in series (hardware release, controller-independent)
that is opto-monitored to GPIO26 for fire detection + cable supervision. See
kicad/and the wiring PDF.
Not in this repo
Build artifacts (.pio/, node_modules/, Flutter build/, installer dist/) and
operational secrets — the per-device serial register / AP passwords (islkey-flasher/serials/)
and any real .islkey provisioning configs — are git-ignored.
Parts
26| Qty | Value | Footprint | References |
|---|---|---|---|
| 4 | 100nF | C_0805_2012Metric | C1, C2, C5, C6 |
| 3 | 1k | R_0805_2012Metric | R1, R4, R7 |
| 2 | 10k | R_0805_2012Metric | R2, R6 |
| 1 | 12V AC/DC IN | TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | J1 |
| 1 | 1N4148 | D_SOD-123 | D1 |
| 1 | 22uF/16V | CP_Elec_6.3x5.3 | C7 |
| 1 | 22uF/25V | CP_Elec_6.3x5.3 | C4 |
| 1 | 4.7uH | L_6.3x6.3_H3 | L1 |
| 1 | 500mA PTC | Fuse_1812_4532Metric | F1 |
| 1 | 53k6 | R_0805_2012Metric | R5 |
| 1 | ABS10 | Diode_Bridge_Diotec_ABS | BR1 |
| 1 | AP63203WU | TSOT-23-6 | U2 |
| 1 | EXIT | TerminalBlock_Phoenix_PT-1,5-2-3.5-H_1x02_P3.50mm_Horizontal | J3 |
| 1 | G6E (2A) | Relay_SPDT_Omron_G6E | K1 |
| 1 | GRN | LED_0805_2012Metric | D4 |
| 1 | LOCK COM/NO/NC | TerminalBlock_Phoenix_PT-1,5-3-3.5-H_1x03_P3.50mm_Horizontal | J2 |
| 1 | LOGO | ISLKey:logo 12mm | G*** |
| 1 | MMBT2222A | SOT-23 | Q1 |
| 1 | PWR | LED_0805_2012Metric | D3 |
| 1 | TTGO T-Display | TTGO_ESP32_TDisplay_v1.1 | M1 |
Questions
How big is the ISLKey Mini PCB?
It measures 60 × 60 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ISLKey Mini use?
26 parts, built around the AP63203WU, ABS10 and MMBT2222A. 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 ISLKey Mini KiCad files?
From the ISLKey/islkey repository on GitHub, at the commit this page was made from: the board is kicad/mini/ISLKey-Mini.kicad_pcb and its schematic kicad/ISLKey.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the ISLKey Mini design in my own project?
Its repository states no licence, so its author keeps all rights: ask ISLKey before reusing the design.
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