.. _olimex_esp32_evb:

Olimex ESP32-EVB
################

Overview
********

The Olimex ESP32-EVB is an OSHW certified, open-source IoT board based on the
Espressif ESP32-WROOM-32E/UE module. It has a wired 100Mbit/s Ethernet Interface,
Bluetooth LE, WiFi, infrared remote control, and CAN connectivity. Two relays
allows switching power appliances on and off.

The board can operate from a single LiPo backup battery as it has an internal
LiPo battery charger. There is no step-up converter, so relays, CAN, and USB
power does not work when running off battery.

.. figure:: ./ESP32-EVB.jpg
   :width: 540px
   :align: center
   :alt: ESP32-EVB

   ESP32-EVB (Credit: Olimex)

Hardware
********

- ESP32-WROOM-32E/UE module with 4MB flash.
- On-board programmer, CH340T USB-to-UART
- WiFi, Bluetooth LE connectivity.
- 100Mbit/s Ethernet interface, Microchip LAN8710A PHY.
- MicroSD card slot.
- 2 x 10A/250VAC (15A/120VAC 15A/24VDC) relays with connectors and status LEDs.
- CAN interface, Microchip MCP2562-E high-speed CAN transceiver.
- IR receiver and transmitter, up to 5 meters distance.
- BL4054B LiPo battery charger with status LEDs for stand-alone operation during
  power outages.
- Power jack for external 5VDC power supply.
- Univeral EXTension (UEXT) connector for connecting UEXT modules.
- User push button.
- 40 pin GPIO connector with all ESP32 pins.

For more information about the ESP32-EVB and the ESP32-WROOM-32E/UE module, see
these reference documents:

- `ESP32-EVB Website`_
- `ESP32-EVB Schematic`_
- `ESP32-EVB GitHub Repository`_
- `ESP32-WROOM32-E/UE Datasheet`_

Supported Features
==================

The olimex_esp32_evb board configuration supports the following hardware
features:

+-----------+------------+-------------------------------------+
| Interface | Controller | Driver/Component                    |
+===========+============+=====================================+
| EFUSE     | on-chip    | hwinfo, device ID                   |
+-----------+------------+-------------------------------------+
| FLASH     | module     | External flash                      |
+-----------+------------+-------------------------------------+
| GPIO      | on-chip    | gpio                                |
+-----------+------------+-------------------------------------+
| I2C       | on-chip    | I2C                                 |
+-----------+------------+-------------------------------------+
| INTERRUPT | on-chip    | interrupt controller                |
+-----------+------------+-------------------------------------+
| IO_MUX    | on-chip    | pinctrl                             |
+-----------+------------+-------------------------------------+
| SPI       | on-chip    | spi                                 |
+-----------+------------+-------------------------------------+
| TIMG      | on-chip    | counter                             |
+-----------+------------+-------------------------------------+
| TRNG      | on-chip    | entropy                             |
+-----------+------------+-------------------------------------+
| UART      | on-chip    | uart                                |
+-----------+------------+-------------------------------------+
| WDT       | on-chip    | watchdog                            |
+-----------+------------+-------------------------------------+
| WiFi      | on-chip    | WiFi                                |
+-----------+------------+-------------------------------------+

The default configuration can be found in the defconfig file:
``boards/xtensa/olimex_esp32_evb/olimex_esp32_evb_defconfig``.

Other hardware features are not currently supported by the port.

Programming and Debugging
*************************

Build and flash applications as usual (see :ref:`build_an_application` and
:ref:`application_run` for more details).

Flashing
========

Here is an example for the :ref:`hello_world` application.

.. zephyr-app-commands::
   :zephyr-app: samples/hello_world
   :board: olimex_esp32_evb
   :goals: flash

Open the serial monitor using the following command:

.. code-block:: shell

   west espressif monitor

After the board has automatically reset and booted, you should see the following
message in the monitor:

.. code-block:: console

   ***** Booting Zephyr OS vx.x.x-xxx-gxxxxxxxxxxxx *****
   Hello World! olimex_esp32_evb

Please see the generic :ref:`esp32` instructions for further tips on programming
and debugging.

.. _ESP32-EVB Website:
   https://www.olimex.com/Products/IoT/ESP32/ESP32-EVB/open-source-hardware

.. _ESP32-EVB Schematic:
   https://github.com/OLIMEX/ESP32-EVB/raw/master/HARDWARE/REV-I/ESP32-EVB_Rev_I.pdf

.. _ESP32-EVB GitHub Repository:
   https://github.com/OLIMEX/ESP32-EVB

.. _ESP32-WROOM32-E/UE Datasheet:
   https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32e_esp32-wroom-32ue_datasheet_en.pdf