add support for DFRobot FireBeetle 2 ESP32-E board

[lmarzen]

This PR adds support for the DFRobot FireBeetle 2 ESP32-E board.

This will close the following issues

• Add support for DFRobot FireBeetle 2 (ESP-WROOM-32E) #644
• Firebeetle DFR0654 #1002

Related PR to add DFRobot FireBeetle 2 ESP32-E board support to arduino-esp32: espressif/arduino-esp32#7835

[lmarzen]

@valeros espressif/arduino-esp32#7835 has been merged. Is this pull request blocked until a new stable version of the Arduino core released with support for this board?

[valeros]

Is this pull request blocked until a new stable version of the Arduino core released with support for this board?

That's correct, this board will be merged when a new release of Arduino core is available. Alternatively, you can manually put together all files in one project, something like this:

ProjectFolder
|-- platformio.ini
|-- boards
|   `-- dfrobot_firebeetle2_esp32e.json <-- Your board manfiest
|-- include
|-- lib
|-- src
|   `-- Blink.ino
|-- test
`-- custom_variants
    `-- dfrobot_firebeetle2_esp32e <-- Your variant implementation
        `-- pins_arduino.h

Where platformio.ini is the following:

[env:dfrobot_firebeetle2_esp32e]
platform = espressif32
framework = arduino
board = dfrobot_firebeetle2_esp32e
monitor_speed = 115200
board_build.variants_dir = custom_variants

[lmarzen]

There is a new release of espressif/arduino-esp32 (2.0.7) that includes support for this board. https://github.com/espressif/arduino-esp32/releases/tag/2.0.7

[valeros]

Many thanks, merged!