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--- iothings:laboratoare:2022:lab9 [2023/01/13 11:11]
dan.tudose [References]
+++ iothings:laboratoare:2022:lab9 [2023/11/20 15:50] (current)
dan.tudose
@@ Line 1: / Line 1: @@
-====== Lab 9. NuttX OS ======
+====== Lab 9. HTTPS and SSL/TLS ======
-In this laboratory you will learn how to build and upload the NuttX OS on your ESP32 Sparrow boards.
-===== Linux set-up tutorial =====
-==== Environment ====
-=== Native Linux machine ===
-You can go ahead to section [Run as sudo].
-=== Windows setup ===
-If running on Windows, you must configure a Linux virtual machine through which to access the USB ports of the host. For this you can use the [[ https://repository.grid.pub.ro/cs/so/linux-2021/so-ubuntu-20-04.ova | SO virtual machine]] - a light Ubuntu 20.04 image that comes only with a CLI - or download the latest official image of any other Linux distributions.
-If available to you, you can use the [[https://vmware.pub.ro/ | VMware Workstation 16 pro]] which is the easiest to configure - just don't forget to add the USB controller to the VM.
-If you do not have access to VMWare, please download VirtualBox. In order to ssh to your virtual machine, please do the following steps:
-  * add a second network adapter to the VM. The first must be a host-only device in order to provide connectivity from host to guest, while the second will be under NAT and will provide Internet acces.
-  * boot the virtual machine. Test with **ping 8.8.8.8** that you have Internet connectivity
-  * add a static IP address on the second interface in the **192.168.56.0/56** subnetwork. For mine I used **192.168.56.56/24**.
-To connect the USB device to the VM instead of the host, head to the upper bar and select //Devices > USB Devices > the UART controller// .
-Currently, the WSL subsystem does not provide native support for USB devices and you must use an open-source tool. Please refer to [[https://learn.microsoft.com/en-us/windows/wsl/connect-usb | this ]] for further details.
-=== Run as sudo ===
-Running as non-root will require a few extra commands for configuration.
-Refer to [[https://blog.espressif.com/getting-started-with-esp32-and-nuttx-fd3e1a3d182c | this]] if you decide to continue as non-root.
-Follow the steps below in order to get your Linux machine properly configured:
-  * install the package dependencies
-  * download the toolchain, since we won't be able to compile with the standard gcc compiler
-  * clone the repositories: nuttx, nuttx-apps
-  * download the prebuilt partition table and bootloader. Alternatively, you can compile your own binaries but this tutorial does not cover it.
-  * compile the NuttX binary
-  * finally, flash the board
-== Install dependencies ==
-<code>
-apt-get update
-apt-get upgrade -y
-apt-get install -y bison flex gettext texinfo libncurses5-dev libncursesw5-dev gperf automake libtool pkg-config build-essential gperf genromfs libgmp-dev libmpc-dev libmpfr-dev libisl-dev binutils-dev libelf-dev libexpat-dev gcc-multilib g++-multilib picocom u-boot-tools util-linux chrony libusb-dev libusb-1.0.0-dev kconfig-frontends python3-pip
-</code>
-== Download the toolchain ==
-<code>
-curl https://dl.espressif.com/dl/xtensa-esp32-elf-gcc8_2_0-esp-2020r2-linux-amd64.tar.gz | tar -xz
-mkdir /opt/xtensa
-mv xtensa-esp32-elf/ /opt/xtensa/
-echo "export PATH=\$PATH:/opt/xtensa/xtensa-esp32-elf/bin" >> ~/.bashrc
-source ~/.bashrc
-</code>
-== Clone the repositories ==
-<code>
-mkdir ~/nuttxspace && cd ~/nuttxspace
-git clone https://github.com/apache/incubator-nuttx.git nuttx
-git clone https://github.com/apache/incubator-nuttx-apps.git apps
-</code>
-== Download the prebuilt bootloader and partition table ==
-<code>
-mkdir esp-bins
-curl -L "https://github.com/espressif/esp-nuttx-bootloader/releases/download/latest/bootloader-esp32.bin" -o esp-bins/bootloader-esp32.bin
-curl -L "https://github.com/espressif/esp-nuttx-bootloader/releases/download/latest/partition-table-esp32.bin" -o esp-bins/partition-table-esp32.bin
-</code>
-== Compile and run ==
-Please be aware that, depending on the board version, you might be required to press down the `BOOT` button when flashing the memory - this puts the board in a download state instead of the default boot state. The button must be pressed down only when the connection is being established, as depicted below:
-{{ :iothings:laboratoare:2022:nuttx_download_mode.png |}}
-<code>
-pip3 install esptool
-pip3 install pyserial
-cd ~/nuttxspace/nuttx
-./tools/configure.sh esp32-wrover-kit:nsh
-make -j4
-esptool.py erase_flash
-make flash ESPTOOL_PORT=/dev/ttyUSB0 ESPTOOL_BAUD=115200 ESPTOOL_BINDIR=../esp-bins
-picocom /dev/ttyUSB0 -b 115200
-<code>
-Flashing the board could be also done by using `esptool.py --chip esp32 --port /dev/ttyUSB0 --baud 921600 write_flash 0x1000 ../esp-bins/bootloader-esp32.bin 0x8000 ../esp-bins/partition-table-esp32.bin 0x10000 nuttx.bin`.
-If the parameters are correct, you should see a log similar to the one below:
-{{ :iothings:laboratoare:2022:nuttx_flash_log.png?700 |}}
-Finally, the boot log should look like this:
-{{ :iothings:laboratoare:2022:nuttx_boot_log.png?700 |}}
-<note>**Assignment 1:** Modify and compile the NuttX OS kernel to toggle on and off an on-board LED. You can use the [[https://embetronicx.com/tutorials/rtos/nuttx/blink-led-on-esp32-using-nuttx-rtos/ | following tutorial]] to get started. </note>
-==== References ====
-  * [[https://github.com/robertalexa2000/nuttx-esp32-docs/blob/main/bringup/linux_tutorial.md | Robert Alexa's excellent tutorial]]
-  * [[https://embetronicx.com/tutorials/rtos/nuttx/setup-nuttx-rtos-on-esp32-dev-board/ | Embedtronix tutorial for ESP32-WROOM]]
-  * [[https://nuttx.apache.org/docs/latest/quickstart/index.html | Official NuttX build tutorial]]
-  * [[https://nuttx.apache.org/docs/latest/platforms/xtensa/esp32/index.html | Official NuttX ESP32 build tutorial]]
-  * [[https://blog.espressif.com/getting-started-with-esp32-and-nuttx-fd3e1a3d182c | Sara Monteiro's tutorial]]
+In this laboratory assignment you will familiarize yourself with establishing an HTTPS connection between your ESP32 board and a browser client. The board will act as a server, with an attached SSL certificate to establish the necessary credentials.
+Follow the steps [[https://randomnerdtutorials.com/esp32-https-requests/ | in this tutorial]] to set up everything on your board.
+<note>**Assignment 1:** Build an ESP32 HTTPS server and connect to it through a browser. </note>