2 layers60 × 60 mm
ISLKey Mini
ISLKey/islkey
ISLKey access-control platform — ESP32 firmware, Electron flasher, Flutter app, KiCad schematic (ISL Technologies)
26 parts
2 layers148.3 × 127.5 mm
ISLKey
ISLKey/islkeyISLKey access-control platform — ESP32 firmware, Electron flasher, Flutter app, KiCad schematic (ISL Technologies)
- Size
- 148.3 × 127.5 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 47
- Nets
- 37
- Pads
- 155
- Tracks, vias
- 346, 23
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 6 Jul 2026
- Updated
- 30 Jul 2026
Overview
ISLKey is an open-source printed circuit board by ISLKey, from the ISLKey/islkey repository on GitHub. It is a 2-layer board of 148.3 × 127.5 mm with 47 parts on 37 nets, routed with 346 tracks and 23 vias.
It is built around the TMR10-2412WIR, TSR 1-2450E and DS3231MZ+, with the PN2222A, SRD-05VDC-SL-C and 100UF/16V among its other parts. Its parts include 11 connectors, 8 resistors, 6 capacitors, 5 diodes and 4 ICs.
Main components
7TMR10-2412WIR
插件插件 Isolated Power Modules ROHSTRACO POWERIsolated Power Modules
TSR 1-2450E
SIP,11.6x7.5mm-40℃~+85℃ 1000uF 1A 520kHz 5V 7V~36V 80mVp-p 92% Buck Short Circuit Protection ±4% SIP,11.6x7.5mm DC-DC Power Modules ROHSTRACO POWERDC-DC Power Modules
DS3231MZ+
SOIC-8-40℃~+85℃ 2.3V~5.5V I2C Temperature compensation、Backup power management and battery charging、Alarm function、Periodic interrupt output SOIC-8 Real Time Clocks ROHSMaxim Integrated (Analog Devices)Real Time Clocks
PN2222A
TO-92-3-55℃~+150℃ 1 NPN 1A 300MHz 300mV 40V 625mW NPN TO-92-3 Bipolar (BJT) ROHSNTE ElectronicsBipolar (BJT)
SRD-05VDC-SL-C
插件,19.2x15.6mm100mΩ 10ms 10ms 15A 250V@AC 360mW 5 5V 70Ω Non-Polarized - Single Coil One set changeover: 1C (SPDT - changeover) 插件,19.2x15.6mm Power Relays ROHS松乐Power Relays
100UF/16V
C1812C1812 SMT ROHSJLCPCB AssemblyUncategorised
CR2032
-- Unclassified goods ROHSMaxellUncategorised
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
47| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 1k | R_0805_2012Metric | R1, R3, R6, R7, R8 |
| 4 | MountingHole_3.2mm_M3 | MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 3 | 100nF | C_0805_2012Metric | C2, C3, C6 |
| 2 | 10k | R_0805_2012Metric | R2, R4 |
| 2 | 1N4007 | D_SMA | D1, D2 |
| 2 | GRN | LED_0805_2012Metric | D4, D5 |
| 2 | PN2222A | TO-92_Inline | Q1, Q2 |
| 2 | SRD-05VDC-SL-C | Relay_SPDT_SANYOU_SRD_Series_Form_C | K1, K2 |
| 1 | 100uF/100V | CP_Elec_10x10.5 | C4 |
| 1 | 100uF/16V | CP_Elec_6.3x5.3 | C1 |
| 1 | 100uF/25V | CP_Elec_6.3x5.3 | C5 |
| 1 | 12V OUT (lock/aux) | TerminalBlock_Phoenix_MKDS-3-2-5.08_1x02_P5.08mm_Horizontal | J11 |
| 1 | 18650 | BatteryHolder_Keystone_1042_1x18650 | BT1 |
| 1 | 2k2 | R_0805_2012Metric | R5 |
| 1 | 5-60V AC/DC IN | TerminalBlock_Phoenix_MKDS-3-2-5.08_1x02_P5.08mm_Horizontal | J10 |
| 1 | AUX COM/NO/NC | TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal | J7 |
| 1 | CR2032 | BatteryHolder_Keystone_3002_1x2032 | BT3 |
| 1 | DCDC ON | PinHeader_1x02_P2.54mm_Vertical | J15 |
| 1 | DS3231M | SOIC-16W_7.5x10.3mm_P1.27mm | U5 |
| 1 | Door contact | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J4 |
| 1 | Exit btn | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J3 |
| 1 | Fire link COM-Fire | PinHeader_1x02_P2.54mm_Vertical | J9 |
| 1 | Fire volt-free | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J8 |
| 1 | KBU4M (4A) | Diode_Bridge_Vishay_KBU | BR1 |
| 1 | LOCK COM/NO/NC | TerminalBlock_Phoenix_MKDS-1,5-3-5.08_1x03_P5.08mm_Horizontal | J6 |
| 1 | PC817 | DIP-4_W7.62mm | U1 |
| 1 | PWR | LED_0805_2012Metric | D3 |
| 1 | T2A | Fuseholder_Clip-5x20mm_Keystone_3512_Inline_P23.62x7.27mm_D1.02x1.57mm_Horizontal | F1 |
| 1 | TMR10-2412WIR | Converter_DCDC_TRACO_TMR10-24xxWIR_48xxWIR_72xxWIR_THT | U3 |
| 1 | TSR-1-2450 | Converter_DCDC_TRACO_TSR-1_THT | U4 |
| 1 | TTGO T-Display | TTGO_ESP32_TDisplay_v1.1 | M1 |
| 1 | TTGO batt pads | PinHeader_1x02_P2.54mm_Vertical | J13 |
| 1 | Tamper | TerminalBlock_Phoenix_MKDS-1,5-2-5.08_1x02_P5.08mm_Horizontal | J5 |
Questions
How big is the ISLKey PCB?
It measures 148.3 × 127.5 mm and has 2 copper layers, 1.6 mm thick.
What parts does the ISLKey use?
47 parts, built around the TMR10-2412WIR, TSR 1-2450E, DS3231MZ+ and PN2222A. 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 KiCad files?
From the ISLKey/islkey repository on GitHub, at the commit this page was made from: the board is kicad/ISLKey.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 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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