• ESP32-GATEWAY Gateway WiFi Ethernet
  • ESP32-GATEWAY Gateway WiFi Ethernet
  • ESP32-GATEWAY Gateway WiFi Ethernet

ESP32-GATEWAY Gateway WiFi Ethernet


The Esp32 Gateway device is one of the development board created by Olimex to evaluate the ESP-WROOM-32 module. Based on the ESP32 microcontroller, Olimex ESP32 Gateway features 100Mb Ethernet Interface, Bluetooth LE, WiFi.


Olimex Esp32 Gateway

Pin Mapping

Official reference for Olimex Esp32 Gateway can be found here.

Flash Layout

The internal flash of the ESP32 module is organized in a single flash area with pages of 4096 bytes each. The flash starts at address 0x00000, but many areas are reserved for Esp32 IDF SDK and Zerynth VM. In particular:

Start addressSizeContent
0x00009000 16Kb Esp32 NVS area
0x0000D000 8Kb Esp32 OTA data
0x0000F000 4Kb Esp32 PHY data
0x00010000 1Mb Zerynth VM
0x00110000 1Mb Zerynth VM (FOTA)
0x00210000 512Kb Zerynth Bytecode
0x00290000 512Kb Zerynth Bytecode (FOTA)
0x00310000 512Kb Free for user storage
0x00390000 448Kb Reserved


  • Microcontroller: Tensilica 32-bit Single-/Dual-core CPU Xtensa LX6

  • Operating Voltage: 3.3V

  • Input Voltage: 2.7-5.5V

  • Digital I/O Pins (DIO): 34

  • Analog Input Pins (ADC): 6

  • UARTs: 2

  • SPIs: 1

  • I2Cs: 1

  • Flash Memory: 4 MB

  • SRAM: 520 KB

  • Clock Speed: 240 Mhz

  • Wi-Fi: IEEE 802.11 b/g/n/e/i:

    • Integrated TR switch, balun, LNA, power amplifier and matching network
    • WEP or WPA/WPA2 authentication, or open networks


Power to the Olimex Esp32 Gateway is supplied via the on-board USB Micro B connector or directly via the “VIN” pin. The power source is selected automatically.

The device can operate on an external supply of 2.7 V to 5.5 V. If using more than 5.5 V, the voltage regulator may overheat and damage the device.


You might also like