`)
+* Basic knowledge of HTTP request methods (`GET`, `POST`) and the concept of URI and routes
+* Reference materials (distributed prior to workshop)
+
+### Required software
+
+* VSCode installed on your machine
+* [ESP-IDF extension](https://docs.espressif.com/projects/vscode-esp-idf-extension/en/latest/installation.html) added to your VSCode.
+* ESP-IDF installed on your machine Temperature: 22.5°C Humidity: 60%
+ _You can install it via VSCode or using [ESP-IDF installer manager](https://docs.espressif.com/projects/idf-im-cli/en/latest/index.html)_
+
+### Required hardware
+
+* The ESP-C3-DevKit-RUST-2 (it will be provided at the workshop).
+ _You could also use an ESP32-C3-Devkit board, but you would need to adjust gpio pin accordingly_
+
+{{< alert iconColor="#df8e1d" cardColor="#edcea3">}}
+We strongly recommend installing VSCode and the ESP-IDF plugin __before__ the workshop begins. If you run into any issues, there will be some time during the first assignment to complete the installation.
+{{< /alert >}}
+
+
+#### Reference table
+
+| Prerequisite | Description | Reference |
+|---|---|---|
+|MCU memory types|Difference between Flash, RAM and EEPROM|[L. Harvie (Medium)](https://medium.com/@lanceharvieruntime/embedded-systems-memory-types-flash-vs-sram-vs-eeprom-93d0eed09086)|
+|MCU serial peripherals|Difference between SPI, I2C, UART|[nextpcb.com](https://www.nextpcb.com/blog/spi-i2c-uart)|
+|Header files and linker|What are headers file for and what's the linker's job|[CBootCamp](https://gribblelab.org/teaching/CBootCamp/12_Compiling_linking_Makefile_header_files.html), [themewaves](https://themewaves.com/understanding-linkers-in-c-programming/)|
+|JSON|Language-independent data format derived from JavaScript. Backbone of REST APIs|[Wikipedia](https://en.wikipedia.org/wiki/JSON)|
+|YAML|Human readable data serialization format used for dependency management through `idf_component.yml`|[Wikipedia](https://en.wikipedia.org/wiki/YAML), [datacamp.com](https://www.datacamp.com/blog/what-is-yaml)|
+|HTML tags|Basic HTML tags introduction|[Freecodecamp](https://www.freecodecamp.org/news/introduction-to-html-basics/)|
+|HTTP Request method|HTTP request (GET, POST, etc.) introduction and differences|[Restfulapi.net](https://restfulapi.net/http-methods/)|
+|ESP-IDF VSCode Plugin|Espressif official VSCode Extension|[vscode-esp-idf-extension installation](https://github.com/espressif/vscode-esp-idf-extension?tab=readme-ov-file#how-to-use)|
+
+
+## Workshop
+
+Without further ado, let's start! You can find a link to each workshop part below. Your next step is __[Lecture 1](lecture-1/)__.
+
+* __Part 1__
+ * [Lecture 1](lecture-1/)
+ * [Assignment 1.1](assignment-1-1/)
+ * [Assignment 1.2](assignment-1-2/)
+* __Part 2__
+ * [Lecture 2](lecture-2/)
+ * [Assignment 2.1](assignment-2-1/)
+ * [Assignment 2.2](assignment-2-2/)
+ * [Assignment 2.3](assignment-2-3/) (Optional)
+* __Part 3__
+ * [Lecture 3](lecture-3/)
+ * [Assignment 3.1](assignment-3-1/)
+ * [Assignment 3.2](assignment-3-2/)
+ * [Assignment 3.3](assignment-3-3/)
+
+
+## Conclusion
+
+You just arrived at the end of this workshop, congratulation! We hope it was a fruitful experience and the start of a longer journey. Thank you for participating in Espressif's workshop!
+
+You are now able to create, build and flash new projects, use external libraries and components, create your own components, and control everything via an HTTP interface. You have now the basic foundation for an IoT application.
+
+We hope this workshop has provided you with the foundational knowledge and confidence to start building your own Espressif-based applications. Keep experimenting, keep learning—and don't forget to explore the rich ecosystem of tools and resources that Espressif offers.
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+[16.323036, "o", ";32mI"]
+[16.323056, "o", " (2"]
+[16.323072, "o", "47) "]
+[16.32311, "o", "main_"]
+[16.323119, "o", "task: Star"]
+[16.323233, "o", "ted on CPU0\u001b[0m\r\r\n"]
+[16.3266, "o", "\u001b[0;"]
+[16.326711, "o", "32mI (247) main_"]
+[16.326755, "o", "task: Calling app_main()\u001b["]
+[16.326788, "o", "0m\r\r\n"]
+[16.327544, "o", "He"]
+[16.327562, "o", "llo wo"]
+[16.327571, "o", "rld"]
+[16.327628, "o", "!\r"]
+[16.327664, "o", "\r\n"]
+[16.336085, "o", "This"]
+[16.33618, "o", " is esp32c3 chip with 1 CP"]
+[16.336223, "o", "U co"]
+[16.336254, "o", "re(s), WiFi"]
+[16.33629, "o", "/BLE, si"]
+[16.336338, "o", "licon revi"]
+[16.336352, "o", "sion v0.3, 2"]
+[16.336395, "o", "MB "]
+[16.336423, "o", "external fl"]
+[16.336443, "o", "ash\r\r\n"]
+[16.33915, "o", "Min"]
+[16.339184, "o", "imum fre"]
+[16.339196, "o", "e heap"]
+[16.339206, "o", " s"]
+[16.339307, "o", "ize"]
+[16.339349, "o", ": 329588 bytes\r\r\n"]
+[16.341636, "o", "Res"]
+[16.341726, "o", "tarting in"]
+[16.341738, "o", " 10 seconds...\r\r\n"]
+[17.341139, "o", "Res"]
+[17.341362, "o", "tarting in 9 seconds...\r\r\n"]
+[18.340914, "o", "Rest"]
+[18.341129, "o", "arting in 8 seconds...\r\r\n"]
+[19.34087, "o", "Restart"]
+[19.341016, "o", "ing in 7 seconds...\r\r\n"]
+[20.340962, "o", "Res"]
+[20.341199, "o", "tarting in 6"]
+[20.34126, "o", " seconds...\r\r\n"]
+[21.340354, "o", "Resta"]
+[21.340408, "o", "rting in 5 seconds...\r\r\n"]
+[22.340835, "o", "Res"]
+[22.34106, "o", "tarting in 4 "]
+[22.341187, "o", "seconds...\r\r\n"]
+[23.340558, "o", "Resta"]
+[23.340703, "o", "rting in 3 seconds...\r\r\n"]
+[24.340323, "o", "Resta"]
+[24.340348, "o", "rting in 2 second"]
+[24.34042, "o", "s..."]
+[24.340468, "o", "\r\r\n"]
+[25.340836, "o", "Res"]
+[25.340918, "o", "tarting in 1"]
+[25.340941, "o", " se"]
+[25.340961, "o", "co"]
+[25.341115, "o", "nd"]
+[25.341152, "o", "s...\r\r\n"]
+[26.341023, "o", "Res"]
+[26.341246, "o", "tarting in 0 seconds...\r\r\n"]
+[27.340904, "o", "Rest"]
+[27.34111, "o", "arting now.\r\r\n"]
diff --git a/content/workshops/esp-idf-basic/assignment-1-1/index.md b/content/workshops/esp-idf-basic/assignment-1-1/index.md
new file mode 100644
index 000000000..41ef313fb
--- /dev/null
+++ b/content/workshops/esp-idf-basic/assignment-1-1/index.md
@@ -0,0 +1,132 @@
+---
+title: "ESP-IDF Basics - Assign. 1.1"
+date: "2025-08-05"
+series: ["WS00A"]
+series_order: 2
+showAuthor: false
+---
+
+
+## Step 0: Install ESP-IDF Extension for VSCode
+
+In this workshop, we'll be using VSCode extension. If you didn't install it yet, please follow [these instructions](https://docs.espressif.com/projects/vscode-esp-idf-extension/en/latest/).
+
+To install ESP-IDF itself, there are two ways:
+
+1. Through the extension configuration
+2. Using the [ESP-IDF installation manager](https://docs.espressif.com/projects/idf-im-ui/en/latest/)
+
+The second will soon become the standard way to manage ESP-IDF.
+
+## Step 1: Create and test a project from an example
+
+In this section, we will:
+
+1. Create a new project from an example
+2. Build the project
+3. Flash and monitor
+
+Please note that most commands in VSCode are executed through the __Command Palette__, which you can open by pressing `Ctrl`+`Shift`+`P` (or `Cmd`+`Shift`+`P`)
+
+{{< alert iconColor="#df8e1d" cardColor="#edcea3">}}
+ In this guide, commands to enter in the __Command Palette__ are marked with the __symbol `>`__. Usually it is sufficient to type a few character of the command, then a dropdown menu will help you find the right one.
+{{< /alert >}}
+
+
+### Create a new project from an example
+
+1. Open VSCode
+2. `> ESP-IDF: Show Example Project`
+3. (If asked) Choose the ESP-IDF version
+4. Click on `get_started` → `hello_world`
+5. Click on the button `Select Location for Creating `hello_world` Example` in the new tab.
+
+
+{{< figure
+default=true
+src="../assets/ass1_1_new_project.webp"
+height=500
+caption="Fig.1 - Create new project tab"
+ >}}
+
+A new window will open with the following file structure:
+
+
+{{< figure
+default=true
+src="../assets/ass1_1_hello_world_files.webp"
+height=500
+caption="Fig.2 - `hello_world` example files"
+ >}}
+
+For now, you can ignore `.vscode`, `.devcontainer`, and `build` folder. You will work on the `hello_world_main.c` file.
+
+### Build the project
+
+To compile (_build_) your project, you first need to tell the compiler which core (called _target_) you are using. You can do it through the IDE as follows:
+
+* `> ESP-IDF: Set Espressif Device Target`
+* In the dropdown menu, choose `esp32c3` → `ESP32-C3 chip (via builtin USB-JTAG)`
+
+Now you're ready to compile your project:
+* `> ESP-IDF: Build Your Project`
+ _You can also click on the small 🔧 icon located in the bottom bar_
+
+A terminal tab will open at the bottom of your IDE and show the successful compilation and size of the compiled binary.
+
+
+{{< figure
+default=true
+src="../assets/ass1_1_compilation_result.webp"
+height=500
+caption="Fig.3 - Compilation result"
+ >}}
+
+{{< alert icon="lightbulb" iconColor="#179299" cardColor="#9cccce">}}
+If you have problems that are hard to debug, it is useful to do a full clean of your project by using the command `> ESP-IDF: Full clean project`.
+{{< /alert >}}
+
+### Flash and monitor
+
+To see the firmware running, you need to store it on the device (_flash_) and then you need to read the output it emits on the serial port (_monitor_).
+
+* Connect the board to your workstation
+* Check that the device is recognized
+* Note the name assigned to the Espressif device
+ * On Windows, it starts with `COM`
+ * On Linux/macOS, it starts with `tty` or `ttyUSB`
+
+If you're having trouble, check the [Establish Serial Connection with ESP32 Guide](https://docs.espressif.com/projects/esp-idf/en/stable/esp32/get-started/establish-serial-connection.html#establish-serial-connection-with-esp32).
+
+Now you can flash and monitor your device.
+
+* `> ESP-IDF: Build, Flash and Start a Monitor on Your Device`
+
+In the terminal, you should now see the `Hello World!` string and the countdown before the reset.
+
+
+
+
+{{< asciinema
+ key="hello_world"
+ idleTimeLimit="2"
+ speed="1.5"
+ poster="npt:0:09"
+>}}
+
+
+## Step 2: Change the output text
+
+Identify the output string and change it to `Hello LED`.
+
+## Conclusion
+
+You can now create a new project and flash it on the board. In the next assignment, we'll consolidate this process.
+
+### Next step
+> Next assignment → [Assignment 1.2](assignment-1-2/)
diff --git a/content/workshops/esp-idf-basic/assignment-1-2/index.md b/content/workshops/esp-idf-basic/assignment-1-2/index.md
new file mode 100644
index 000000000..1322d22cb
--- /dev/null
+++ b/content/workshops/esp-idf-basic/assignment-1-2/index.md
@@ -0,0 +1,41 @@
+---
+title: "ESP-IDF Basics - Assign. 1.2"
+date: "2025-08-05"
+series: ["WS00A"]
+series_order: 3
+showAuthor: false
+---
+
+## Main task
+
+For this assignment, you will create a new project from the other `get_started` example: `blink`.
+In the `blink` example, you need to specify the GPIO on which the LED is connected. The default value is `GPIO8` but it's different on your board. You will need to change the configuration value through `menuconfig`.
+
+* Create the project from example as done in the previous assignment.
+* Change the example GPIO number in `menuconfig`:
+ * Find the GPIO on which the LED is connected on your board
+ * `> ESP-IDF: SDK Configuration Editor (menuconfig)` → `Example Configuration` → `Blink GPIO number`
+* Build, flash, and monitor the example.
+* Check that the LED is flashing. Is the output port correct? See the board schematic.
+
+
+{{< figure
+default=true
+src="../assets/esp-board-top.webp"
+height=500
+caption="Fig.1 - Board Top View"
+ >}}
+
+## Bonus task
+
+* (Bonus) Change the main filename to `hello_led_main.c` and the project folder to `hello_led`. Did you encounter errors?
+ * Where is the problem?
+
+## Conclusion
+
+You have now a solid understanding of the project creation, building, and flashing.
+In the next lesson, we will focus on what usually is the main topic for an Espressif application -- *connectivity*.
+
+### Next step
+
+> Next lecture → __[Lecture 2](lecture-2/)__
diff --git a/content/workshops/esp-idf-basic/assignment-2-1/index.md b/content/workshops/esp-idf-basic/assignment-2-1/index.md
new file mode 100644
index 000000000..ae7bde6a5
--- /dev/null
+++ b/content/workshops/esp-idf-basic/assignment-2-1/index.md
@@ -0,0 +1,457 @@
+---
+title: "ESP-IDF Basics - Assign. 2.1"
+date: "2025-08-05"
+series: ["WS00A"]
+series_order: 5
+showAuthor: false
+---
+
+
+
+In this assignment, we will build up on the code from the last assignment. We will start a soft-AP and an HTTP server.
+
+
+## Starting a soft-AP
+
+To keep things as simple as possible, this tutorial will hard-code the access point (AP) credentials. As a result, we won't use Non-Volatile Storage (NVS), which is typically used in Wi-Fi applications to store credentials and calibration data.
+
+NVS is enabled by default. To avoid warnings and errors, we have to disable it through `menuconfig`.
+
+### Disable NVS
+
+To disable NVS, we need to access the `menuconfig` and look for `NVS`
+
+* `> ESP-IDF: SDK Configuration Editor (menuconfig)` → `NVS`
+
+{{< figure
+default=true
+src="../assets/ass_2_1_disable_nvs.webp"
+height=500
+caption="NVS options to be disabled"
+ >}}
+
+### Define soft-AP parameters
+
+The soft-AP parameters we need are
+```c
+#define ESP_WIFI_SSID "Hello World
";
+ httpd_resp_send(req, resp_str, HTTPD_RESP_USE_STRLEN);
+ return ESP_OK;
+
+}
+```
+Note the HTML embedded in the response string.
+
+#### Connect to the server
+
+For Espressif devices, the default IP address of the Soft-AP is usually `192.168.4.1`.
+
+You can verify this in the terminal output. Look for a log line like this:
+```bash
+I (766) esp_netif_lwip: DHCP server started on interface WIFI_AP_DEF with IP: 192.168.4.1
+```
+
+Open the web browser again on your connected device and enter the IP address in the address bar. As shown in Fig.3, you should now get the HTML page that we sent in the `hello_get_handler` function.
+
+{{< figure
+default=true
+src="../assets/ass_2_1_result.webp"
+height=100
+caption="Fig. 3 – HTML page displayed"
+ >}}
+
+ ## Assignment Code
+
+Show assignment code
+
+```c
+/* Blink Example
+
+ This example code is in the Public Domain (or CC0 licensed, at your option.)
+
+ Unless required by applicable law or agreed to in writing, this
+ software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ CONDITIONS OF ANY KIND, either express or implied.
+*/
+#include Hello World
";
+ httpd_resp_send(req, resp_str, HTTPD_RESP_USE_STRLEN);
+ return ESP_OK;
+
+}
+
+static const httpd_uri_t hello_world_uri= {
+ .uri = "/", // the address at which the resource can be found
+ .method = HTTP_GET, // The HTTP method (HTTP_GET, HTTP_POST, ...)
+ .handler = hello_get_handler, // The function which process the request
+ .user_ctx = NULL // Additional user data for context
+};
+
+
+
+httpd_handle_t start_webserver() {
+ httpd_handle_t server = NULL;
+ httpd_config_t config = HTTPD_DEFAULT_CONFIG();
+
+ if (httpd_start(&server, &config) == ESP_OK) {
+ ESP_LOGI(TAG, "Server started successfully, registering URI handlers...");
+ return server;
+ }
+
+ ESP_LOGE(TAG, "Failed to start server");
+ return NULL;
+}
+
+
+void app_main(void)
+{
+
+ /* Configure the peripheral according to the LED type */
+ configure_led();
+ wifi_init_softap();
+ httpd_handle_t server = start_webserver();
+ httpd_register_uri_handler(server,&hello_world_uri);
+
+ while (1) {
+ ESP_LOGI(TAG, "Turning the LED %s!", s_led_state == true ? "ON" : "OFF");
+ blink_led();
+ /* Toggle the LED state */
+ s_led_state = !s_led_state;
+ vTaskDelay(CONFIG_BLINK_PERIOD / portTICK_PERIOD_MS);
+ }
+}
+
+```
+
+Show assignment code
+
+```c
+#include Hello World
";
+ httpd_resp_send(req, resp_str, HTTPD_RESP_USE_STRLEN);
+ return ESP_OK;
+
+}
+
+static const httpd_uri_t hello_world_uri= {
+ .uri = "/", // the address at which the resource can be found
+ .method = HTTP_GET, // The HTTP method (HTTP_GET, HTTP_POST, ...)
+ .handler = hello_get_handler, // The function which process the request
+ .user_ctx = NULL // Additional user data for context
+};
+
+static esp_err_t led_on_handler(httpd_req_t *req)
+{
+ led_control(1);
+
+ const char* resp_str = "{\"led\": \"on\"}";
+ httpd_resp_set_type(req, "application/json");
+ httpd_resp_send(req, resp_str, HTTPD_RESP_USE_STRLEN);
+ return ESP_OK;
+}
+
+static esp_err_t led_off_handler(httpd_req_t *req)
+{
+ led_control(0);
+
+ const char* resp_str = "{\"led\": \"off\"}";
+ httpd_resp_set_type(req, "application/json");
+ httpd_resp_send(req, resp_str, HTTPD_RESP_USE_STRLEN);
+ return ESP_OK;
+}
+
+static esp_err_t led_blink_handler(httpd_req_t *req)
+{
+ char buf[100];
+ int ret = httpd_req_recv(req, buf, sizeof(buf));
+ if (ret <= 0) {
+ httpd_resp_send_500(req);
+ return ESP_FAIL;
+ }
+
+ buf[ret] = '\0';
+
+ int times = 0, interval = 0;
+ sscanf(buf, "{\"times\": %d, \"interval_ms\": %d}", ×, &interval);
+
+ // add logging for debugging
+ ESP_LOGI(TAG, "Blinking LED %d times with interval %d ms", times, interval);
+
+ for (int i = 0; i < times; i++) {
+ s_led_state = 1;
+ led_control(s_led_state);
+ vTaskDelay(interval / portTICK_PERIOD_MS);
+ s_led_state = 0;
+ led_control(s_led_state);
+ vTaskDelay(interval / portTICK_PERIOD_MS);
+ }
+
+ const char* resp_str = "{\"blink\": \"done\"}";
+ httpd_resp_set_type(req, "application/json");
+ httpd_resp_send(req, resp_str, HTTPD_RESP_USE_STRLEN);
+ return ESP_OK;
+}
+
+static const httpd_uri_t led_on_uri = {
+ .uri = "/led/on",
+ .method = HTTP_GET,
+ .handler = led_on_handler,
+ .user_ctx = NULL
+};
+
+static const httpd_uri_t led_off_uri = {
+ .uri = "/led/off",
+ .method = HTTP_GET,
+ .handler = led_off_handler,
+ .user_ctx = NULL
+};
+
+static const httpd_uri_t led_blink_uri = {
+ .uri = "/led/blink",
+ .method = HTTP_POST,
+ .handler = led_blink_handler,
+ .user_ctx = NULL
+};
+
+httpd_handle_t start_webserver() {
+ httpd_handle_t server = NULL;
+ httpd_config_t config = HTTPD_DEFAULT_CONFIG();
+
+ if (httpd_start(&server, &config) == ESP_OK) {
+ ESP_LOGI(TAG, "Server started successfully, registering URI handlers...");
+ return server;
+ }
+
+ ESP_LOGE(TAG, "Failed to start server");
+ return NULL;
+}
+
+void app_main(void)
+{
+
+ /* Configure the peripheral according to the LED type */
+ configure_led();
+ wifi_init_softap();
+ httpd_handle_t server = start_webserver();
+ httpd_register_uri_handler(server, &hello_world_uri);
+ httpd_register_uri_handler(server, &led_on_uri);
+ httpd_register_uri_handler(server, &led_off_uri);
+ httpd_register_uri_handler(server, &led_blink_uri);
+
+}
+```
+
+ _Supports Station mode, SoftAP mode, SoftAP + Station mode, and promiscuous mode._
+
+- A __Bluetooth LE subsystem__
+ _Supports Bluetooth 5 and Bluetooth mesh._
+
+- __Integrated memory__
+ _400 KB SRAM and 384 KB ROM on the chip, external flash connection capability_
+
+- __Security mechanisms__
+ _Cryptographic hardware accelerators, encrypted flash, secure bootloader_
+
+- A __rich set of peripheral interfaces__
+ _The 22 programmable GPIOs can be configured flexibly to support LED PWM, UART, I2C, SPI, I2S, ADC, TWAI, RMT, and USB Serial/JTAG applications._
+
+The ESP32-C3 series of chips has several variants, including the version with in-package SPI flash. You can find them on the [ESP32-C3 Series Comparison](https://www.espressif.com/sites/default/files/documentation/esp32-c3_datasheet_en.pdf#page=12) section of the datasheet. ESP8685 is a small package version of ESP32-C3.
+
+
+
+
+### ESP32-C3-Mini-1-N4 Module
+
+In addition to SoCs, Espressif offers modules, which integrate an SoC, additional flash, (optionally) PSRAM memory, and a PCB antenna or an antenna connector. The main advantage of modules is not only their ease of use but also a simplified certification process.
+
+The module we will use is the ESP32-C3-MINI-1-N4. As the name suggests, it includes 4MB of flash. If you're curious about how to interpret the module part number, you can check the article [Espressif part numbers explained: A complete guide - Modules](https://developer.espressif.com/blog/2025/03/espressif-part-numbers-explained/) on the Espressif Developer Portal .
+
+### ESP32-C3 Workshop board
+
+
+{{< figure
+default=true
+src="../assets/esp-board-top.webp"
+height=500
+caption="Fig.2 - Workshop board"
+ >}}
+
+#### Board peripheral overview
+
+__I2C peripheral__
+
+This board includes the following peripherals over the I2C bus:
+
+| Peripheral | Part number | Reference | Crate | Address |
+| ------------------------ | ----------- | -------------------------------------------------------------------------------------------------------------- | ----------------------------------------- | ------- |
+| IMU | ICM-42670-P | [Datasheet](https://invensense.tdk.com/download-pdf/icm-42670-p-datasheet/) | [Link](https://crates.io/crates/icm42670) | 0x68 |
+| Temperature and Humidity | SHTC3 | [Datasheet](https://www.mouser.com/datasheet/2/682/Sensirion_04202018_HT_DS_SHTC3_Preliminiary_D2-1323493.pdf) | [Link](https://crates.io/crates/shtcx) | 0x70 |
+
+_I2C Bus Connection_
+
+| Signal | GPIO |
+| ------ | ------ |
+| SDA | GPIO7 |
+| SCL | GPIO8 |
+
+__GPIO__
+
+The following devices are connected through GPIO:
+
+| I/O Devices | GPIO |
+| ----------- | ----- |
+| WS2812 LED | GPIO2 |
+| LED | GPIO10 |
+| Button/Boot | GPIO9 |
+
+__Power supply__
+
+* USB type-C (*no PD compatibility*).
+* Li-Ion battery charger - MCP73831T-2ACI/OT, it charges up to 4.2V.
+ * Recommendation: MCP73831T-2ACI/OT does not provide battery protection for over-current or over-discharge. For the battery (Li-Ion or Li-Po), it's recommended to use the ones with embedded protection.
+ * Limitation: reading the battery voltage is not supported.
+
+__Pin Layout__
+
+
+_Left Side_
+
+| Pin Number | Description | SoC |
+| ---------- | ------------ | ---------- |
+| 1 | Reset | EN/CHIP_PU |
+| 2 | 3V3 | |
+| 3 | N/C | |
+| 4 | GND | |
+| 5 | IO0/ADC1-0 | GPIO0 |
+| 6 | IO1/ADC1-1 | GPIO1 |
+| 7 | IO2/ADC1-2 | GPIO2 |
+| 8 | IO3/ADC1-3 | GPIO3 |
+| 9 | IO4/ADC2-0 | GPIO4 |
+| 10 | IO5/ADC2-1 | GPIO5 |
+| 11 | IO6/MTCK | GPIO6 |
+| 12 | IO7/MTDO/LED | GPIO7 |
+| 13 | IO8/LOG | GPIO8 |
+| 14 | IO21/U0RXD | GPIO21 |
+| 15 | IO20/U0TXD | GPIO20 |
+| 16 | IO9/BOOT | GPIO9 |
+
+_Right Side_
+
+| Pin Number | Description | SoC |
+| ---------- | ----------- | ------ |
+| 1 | VBAT | |
+| 2 | EN [1] | |
+| 3 | VBUS [2] | |
+| 4 | NC | |
+| 5 | NC | |
+| 6 | NC | |
+| 7 | NC | |
+| 8 | NC | |
+| 9 | IO18/USB_D- | GPIO18 |
+| 10 | IO19/USB_D+ | GPIO19 |
+| 11 | IO8/SCL | GPIO8 |
+| 12 | IO10/SDA | GPIO10 |
+
+ * [1] Connected to LDO enable pin*
+ * [2] Connected to USB 5V*
+
+#### Schematics
+You can find the board schematic on the [KiCad Libraries GitHub Repository](https://github.com/espressif/kicad-libraries).
+
+
+## Conclusion
+
+Now that we have a high-level overview of both hardware and firmware, we're ready to start the first assignment.
+
+### Next Step
+> Next Assignment → __[assignment 1.1](assignment-1-1)__
diff --git a/content/workshops/esp-idf-basic/lecture-2/index.md b/content/workshops/esp-idf-basic/lecture-2/index.md
new file mode 100644
index 000000000..244a4db7f
--- /dev/null
+++ b/content/workshops/esp-idf-basic/lecture-2/index.md
@@ -0,0 +1,229 @@
+---
+title: "ESP-IDF Basics - Lecture 2"
+date: "2025-08-05"
+series: ["WS00A"]
+series_order: 4
+showAuthor: false
+---
+
+## Internet connectivity
+
+Applications communicate over the internet using different protocols, many of which are build on top of other protocols forming a layered structure.
+
+The __ISO/OSI model__ is a _conceptual_ framework that breaks down how data (like messages, videos, or web pages) travels across networks — including Wi-Fi and Ethernet — into __seven steps (layers)__. Each layer has its own job and uses specific __protocols__ (rules or languages for communication).
+
+The **ISO/OSI model** is a *conceptual* framework that explains how data such as messages, videos, or web pages travels across networks like Wi-Fi or Ethernet. It organizes this process into seven *layers*, each with a specific role and associated *protocols* --- the rules that govern communication at that layer.
+
+It is typically visualized like on Fig.1.
+
+{{< figure
+default=true
+src="../assets/lec_2_isoosi.webp"
+height=500
+caption="Fig.1 - ISO OSI Stack"
+ >}}
+Starting from the bottom, the layers are:
+1. __Physical__ - This is the actual hardware: radio signals, antennas, and frequencies.
+ 🔧 *Example: Wi-Fi, Ethernet*
+
+2. __Data Link__ - Controls the direct connection between devices (like your laptop and router) and handles things like access to the wireless channel.
+ 🔧 *Example: MAC (Media Access Control)*
+
+3. __Network__ - Figures out how data gets from one network to another.
+ 🔧 *Example: IP (Internet Protocol)*
+
+4. __Transport__ - Makes sure data is delivered correctly and in the right order.
+ 🔧 *Examples: TCP (Transmission Control Protocol), UDP (User Datagram Protocol)*
+
+5. __Session__ - Manages and maintains connections between devices or applications.
+ 🔧 *No single protocol in Wi-Fi, but session handling happens in apps using things like NetBIOS, SMB, or TLS*
+
+6. __Presentation__ - Translates data so it's readable on both ends (like turning an encrypted message back into text).
+ 🔧 *Examples: SSL/TLS (used for encryption), JPEG, MP3, ASCII*
+
+7. __Application__ - What the user sees: websites, video calls, email, etc.
+ 🔧 *Examples: HTTP (web), HTTPS (secure web), SMTP (email), FTP (file transfer), DNS (domain names)*
+
+
+Some of the layers of this conceptual framework can me managed by a single protocol. For instance the Ethernet protocol takes care of both the physical and the data link layers.
+
+Each layer passes its work to the next.
+You can combine these layers as it usually happens. For instance the __MQTT__ protocol sits at the same level as HTTP. Both of them make use of the TCP/IP stack.
+
+### Encapsulation
+
+The combination of the layers is done through encapsulation.
+
+Encapsulation is the process by which data is wrapped with protocol information at each layer of the network stack to facilitate proper transmission and delivery. In the context of a Wi-Fi network, application data is first encapsulated within a __TCP segment__, which provides reliable transport services. This TCP segment is then encapsulated within an __IP packet__, adding logical addressing and routing information necessary for delivery across networks. Finally, the IP packet is enclosed within a __Wi-Fi (IEEE 802.11) frame__ or an __Ethernet frame__, which handles the physical and data link layer functions for wireless communication. Each layer adds its own header (and sometimes trailer) to the data unit, enabling modular and efficient network communication.
+
+A picture is worth more than a thousand words:
+
+{{< figure
+default=true
+src="../assets/lec_2_encapsulation.webp"
+height=500
+caption="Fig.2 - Encapsulation"
+ >}}
+
+Simply put, the whole content of the higher level is inside the _payload_ or _data_ field of the lower layer protocol.
+
+## Connectivity in Espressif
+
+Now that we have an understanding of the connectivity layers, let's explore which ones are supported by Espressif.
+
+### Physical Layers
+
+Espressif modules support three main physical layers, depending on the SoC:
+
+1. **Wi-Fi**: Supported by all devices, it is used for connection to a router and then to the internet. It will be the focus of this workshop.
+2. **BLE**: In IoT, it is mainly used for direct communication with a smartphone and for provisioning (i.e. setting up credentials).
+3. **Thread/Zigbee**: IoT protocols that are used for __local__ machine-to-machine (M2M) communication based on mesh topology (many to many connection). To connect to the internet, a Thread-to-Wi-Fi bridge is required.
+
+{{< alert icon="circle-info" cardColor="#b3e0f2" iconColor="#04a5e5">}}
+The Matter protocol utilizes all of these connectivity layers: BLE is used for provisioning, Thread enables low-power communication, and Wi-Fi is used for high-bandwidth data transfer.
+{{< /alert >}}
+
+In this workshop, we will focus on Wi-Fi only. Let's briefly review its topology.
+
+#### Wi-Fi topology
+
+In a Wi-Fi network, there are two main roles: __Access Point (AP)__ (usually called softAP in Espressif) and __Station (STA)__.
+
+* The __Access Point (AP)__ is the central device (like a Wi-Fi router) that broadcasts the wireless network and connects stations to each other _and_ to external networks like the internet.
+* A __Station (STA)__ is any device that connects to the AP. It can be a smartphone, laptop, or smart home device.
+
+The AP manages the wireless medium, while STAs communicate __through__ the AP, not directly with each other (unless in ad hoc mode).
+This setup forms a __basic infrastructure mode__ network, which is the most common type of Wi-Fi setup.
+
+
+{{< figure
+default=true
+src="../assets/lec_2_sta_ap.webp"
+height=500
+caption="Fig.3 - STA vs AP"
+ >}}
+
+Espressif's modules can function in both modes.
+To connect to an AP, a station need the __SSID__ (router network name) and the password.
+
+In the first part of the assignment, we will put the Espressif device in AP mode and use our smartphone to connect to it.
+
+### Application layer protocols
+
+In the Internet of Things (IoT), various communication protocols are used, with __MQTT__ and __HTTP__ being among the most common.
+__MQTT__ is specifically designed for __machine-to-machine (M2M) communication__ and is widely used to manage networks of sensors and actuators, particularly in home automation systems due to its lightweight and efficient messaging model.
+
+__HTTP__, on the other hand, is best known as the protocol behind the web, used to deliver HTML-based content. However, another major application of HTTP in IoT is for implementing __REST APIs__. These APIs are not intended for direct user interaction, but rather to be accessed by external applications or services.
+
+For example, imagine a smart home web application that displays the status of various sensors in your house. Instead of connecting to each device individually, the application queries the __REST API__ exposed by a __sensor gateway__, which acts as a bridge between the devices and the user interface.
+
+In this webinar, we will use HTTP to serve a simple HTML page and implement a REST API, so let's focus on these concepts.
+
+## HTTP, HTML, and JSON: Serving Web Pages and Building REST APIs
+
+HTTP can be used to serve HTML pages (like those viewed in web browsers) and structured data such as JSON, which is commonly used to implement REST APIs—mainly for communication between applications.
+
+### HTTP Basics
+
+__HTTP (Hypertext Transfer Protocol)__ is the foundation of communication on the web, based on a simple __client-server model__. In this model, the client (such as a web browser or application) sends a request to a server, which processes it and returns a response.
+
+#### HTTP Requests
+
+HTTP defines several request methods, each serving a specific purpose:
+
+* __GET__ - Retrieve data from the server
+* __POST__ - Send or create new data on the server
+* __PUT__ - Update existing data
+* __DELETE__ - Remove data
+
+#### HTTP Responses
+
+After receiving a request, the server sends an HTTP response, which includes a __status code__ to indicate the outcome. Common status codes include:
+
+* __200 OK__ - The request was successful
+* __201 Created__ - A new resource was successfully created (usually after a POST)
+* __400 Bad Request__ - The server couldn't understand the request due to invalid syntax
+* __401 Unauthorized__ - Authentication is required or has failed
+* __404 Not Found__ - The requested resource does not exist
+* __500 Internal Server Error__ - A general error occurred on the server
+
+Modern applications and IoT systems often use __JSON (JavaScript Object Notation)__ to format and exchange data. This structured format is at the core of __REST APIs__, which allow clients to interact with server-side resources using standard HTTP methods.
+
+{{< figure
+default=true
+src="../assets/lec_2_http_request.webp"
+height=500
+caption="Fig.4 - Client-server interaction"
+>}}
+
+### HTML: Web Pages
+
+__HTML (HyperText Markup Language)__ is the standard language for creating web pages. With ESP-IDF, you can serve HTML pages directly from your embedded device using HTTP.
+
+These HTML pages can be used to:
+
+* Display real-time sensor readings
+* Provide control interfaces (e.g., buttons or sliders to interact with GPIOs)
+* Allow user configuration of network settings or parameters
+
+A simple HTML page served by an ESP device might look like this:
+
+```html
+
+
+
+ Living Room Sensor
+