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==============
ESP-WROVER-KIT
==============
The `ESP-WROVER-KIT <https://docs.espressif.com/projects/esp-idf/en/latest/esp32/hw-reference/esp32/get-started-wrover-kit.html> `_ is a development board for the ESP32 SoC from Espressif, based on a ESP32-WROVER-B module.
.. list-table ::
:align: center
* - .. figure:: esp-wrover-kit-v4.1-layout-back.png
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ESP-WROVER-KIT board layout - front
- .. figure:: esp-wrover-kit-v4.1-layout-front.png
:align: center
ESP-WROVER-KIT board layout - back
Features
========
- ESP32-WROVER-B module
- LCD screen
- MicroSD card slot
Its another distinguishing feature is the embedded FTDI FT2232HL chip,
an advanced multi-interface USB bridge. This chip enables to use JTAG
for direct debugging of ESP32 through the USB interface without a separate
JTAG debugger. ESP-WROVER-KIT makes development convenient, easy, and
cost-effective.
Most of the ESP32 I/O pins are broken out to the board’
Serial Console
==============
UART0 is, by default, the serial console. It connects to the on-board
FT2232HL converter and is available on the USB connector USB CON8 (J5).
It will show up as /dev/ttyUSB[n] where [n] will probably be 1, since
the first interface ([n] == 0) is dedicated to the USB-to-JTAG interface.
Buttons and LEDs
================
Buttons
-------
There are two buttons labeled Boot and EN. The EN button is not available
to software. It pulls the chip enable line that doubles as a reset line.
The BOOT button is connected to IO0. On reset it is used as a strapping
pin to determine whether the chip boots normally or into the serial
bootloader. After reset, however, the BOOT button can be used for software
input.
LEDs
----
There are several on-board LEDs for that indicate the presence of power
and USB activity.
There is an RGB LED available for software.
Pin Mapping
===========
===== ========================= ==========
Pin Signal Notes
===== ========================= ==========
0 RGB LED Red / BOOT Button
2 RGB LED Green
4 RGB LED Blue
5 LCD Backlight
18 LCD Reset
19 LCD Clock
21 LCD D/C
22 LCD CS
23 LCD MOSI
25 LCD MISO
===== ========================= ==========
Configurations
==============
nsh
---
Basic NuttShell configuration (console enabled in UART0, exposed via
USB connection by means of FT2232HL converter, at 115200 bps).
wapi
----
Enables Wi-Fi support.
gpio
----
This is a test for the GPIO driver. It includes the 3 LEDs and one, arbitrary, GPIO.
For this example, GPIO22 was used.
At the nsh, we can turn LEDs on and off with the following::
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nsh> gpio -o 1 /dev/gpio0
nsh> gpio -o 0 /dev/gpio0
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We can use the interrupt pin to send a signal when the interrupt fires::
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nsh> gpio -w 14 /dev/gpio2
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The pin is configured to as a rising edge interrupt, so after issuing the
above command, connect it to 3.3V.
spiflash
--------
This config tests the external SPI that comes with an ESP32 module connected
through SPI1.
By default a SmartFS file system is selected.
Once booted you can use the following commands to mount the file system::
mksmartfs /dev/smart0
mount -t smartfs /dev/smart0 /mnt
Note that `mksmartfs`
nx
--
This config adds a set of tests using the graphic examples at `apps/example/nx`
This configuration illustrates the use of the LCD with the lower performance
SPI interface.
lvgl
----
This is a demonstration of the LVGL graphics library running on the NuttX LCD
driver. You can find LVGL here::
https://www.lvgl.io/
https://github.com/lvgl/lvgl
This configuration uses the LVGL demonstration at `apps/examples/lvgldemo`
External devices
=================
BMP180
------
When using BMP180 (enabling `` CONFIG_SENSORS_BMP180 `` ), it's expected this device is wired to I2C0 bus.
