Olimex ESP32-C6-EVB supports WiFi 6, BLE, Zigbee, comes with four relays, four opto-isolated inputs

Olimex ESP32-C6-EVB is an open-source hardware board based on an ESP32-C6 wireless module with 2.4 GHz WiFi 6, Bluetooth LE, and Zigbee connectivity, and offering four relays and four opto-isolated inputs, as well as further expansion via two UEXT connector.

So far we had a limited amount of third-party ESP32-C6 boards, with Espressif making their own module and development board available in January, and 01Space launching a tiny ESP32-C6 board in April, a time when a lot of software work was still needed.  But the ESP-IDF v5.1 with ESP32-C6 support is nearing release (now RC2), and the Olimex board may mark the start of greater availability of ESP32-C6 hardware with stable/usable firmware.

Olimex ESP32-C6-EVB

ESP32-C6-EVB specifications:

  • Wireless module – ESP32-C6-WROOM-1-N4 module with
    • Espressif Systems ESP32-C6 single core 32-bit RISC-V processor @ 160 MHz with 2.4 GHz WiFi 6 1T1R with Target Wake Time (TWT) support, Bluetooth LE 5.0, and 802.15.4 radio for Zigbee, Thread, Matter, 2.4GHz proprietary
    • Storage – 4MB SPI flash
    • PCB antenna
  • USB – 1x USB Type-C port for programming and JTAG debugging
  • I/Os and expansion
    • 4x relays (10A/240VAC)
    • 4x opto-isolated inputs for DC voltage up to 30VDC
    • 2x UEXT connectors
    • Extension GPIO connector
  • Programming connector
  • Misc – Reset and user buttons
  • Power Supply – 6-50V DC wide range supply voltage via DC jack
  • Dimensions – TBD (Four mount holes)

ESP32 C6 board relays isolated inputs

Since the ESP32-C6-EVB is an open-source hardware board, Olimex will eventually release the schematic in PDF format and the KiCAD hardware design files, provide a user manual, as well as a demo project with source code. But at the time of writing, none of the links are up, and I expect those to become available shortly after the board starts shipping on June 30.

Olimex is already taking pre-orders for the ESP32-C6-EVB board for 15 Euros, and shipping should start by the end of the month.

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11 months ago

What’s the socket UEXT2 is wired to at the bottom right?

11 months ago

cannot see photocoupler on board, could you point it out?

11 months ago

black rectangles with 2×2 pins, close to 2pin blue sockets have OPTx marks.

11 months ago

Looks nice, pity they don’t have an 8 relay / 8 input version.

11 months ago

You can probably use some of their MOD-IO boards to expand the number of relays (through UEXT):

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