INEX OpenKB is a development board based on the ESP32 microcontroller using XTENSA architecture.
This board features a maximum CPU frequency of 240 MHz and 4MB flash memory.
About INEX OpenKB
ESP32-powered open keyboard platform - great for custom keyboards, input devices, and maker builds.
📋 Technical Specifications
Complete technical specification details for INEX OpenKB
🛰️ Connectivity
🧠 Microcontroller
✨ Features & Pins
Pin Mappings
Complete pinout and GPIO mapping for INEX OpenKB
| Pin | Analog | Touch | PWM | Other |
|---|---|---|---|---|
| 0 | A11 | T1 | ||
| 1 | PWM | TX WIRE1_PIN_DEFINED | ||
| 2 | A12 | T2 | PWM | WIFI_LED |
| 3 | PWM | RX | ||
| 4 | A10 | T0 | PWM | SDA1 |
| 5 | PWM | SS SCL1 | ||
| 12 | A15 | T5 | PWM | IOT_LED |
| 13 | A14 | T4 | PWM | BUZZER |
| 14 | A16 | T6 | PWM | SW2 |
| 15 | A13 | T3 | PWM | NTP_LED |
| 16 | PWM | LED_BUILTIN SW1 | ||
| 17 | PWM | BT_LED | ||
| 18 | PWM | SCK KB_GPIO18 | ||
| 19 | PWM | MISO KB_GPIO19 | ||
| 21 | PWM | SDA SDA0 | ||
| 22 | PWM | SCL SCL0 | ||
| 23 | PWM | MOSI | ||
| 25 | A18 | PWM | DAC1 | |
| 26 | A19 | PWM | DAC2 OUTPUT1 | |
| 27 | A17 | T7 | PWM | OUTPUT2 |
| 32 | A4 | T9 | PWM | INPUT1 |
| 33 | A5 | T8 | PWM | INPUT2 |
| 34 | A6 | INPUT3 | ||
| 35 | A7 | INPUT4 | ||
| 36 | A0 | LDR_PIN | ||
| 39 | A3 | |||
| KB_GPIO23= |
Default Tools & Configuration
Build and upload settings for INEX OpenKB
| Setting | Value |
|---|---|
| Bootloader tool | esptool_py |
| Uploader tool | esptool_py |
| Network uploader tool | esp_ota |
| Bootloader address | 0x1000 |
| Flash mode | dio |
| Boot mode | dio |
| Maximum upload size | 1280 KB (1310720 bytes) |
| Maximum data size | 320 KB (327680 bytes) |
The INEX OpenKB uses esptool_py for uploads , esp_ota for OTA updates, and esptool_py bootloader at 0x1000.
Flash mode: dio | Boot mode: dio
Max sketch size: 1280 KB | Max data size: 320 KB
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