ESP-IDF notes

ESP IoT Development Framework

ESP-IDF was installed to the default directory: C:\espressif\ I've first installed ESP-IDF using #1 below and using vs code extension from #2 below.

My ESP-IDF version: 4.4.2

Methods to install

The error-free method to install ESP-IDF is first run the Standalone installer and then add the VS Code extension.

1. Standalone installation via web installer: ESP-IDF v4.4.2 (this installs Espressif-IDE too)

(Standard Setup of Toolchain for Windows - ESP32 - — ESP-IDF Programming Guide latest documentation (espressif.com))
I've installed support for all boards. But can save space by selecting the boards you would like to use.

1. Take start menu shortcut for the 'ESP-IDF vXX':

2. Goto the folder containing the code.

      idf.py set-target esp32
      Idf.py menuconfig
      Idf.py build
      Idf.py -p <COMPORT> flash
      Idf.py -p <COMPORT> monitor

3. Espressif-IDE is pretty self-explanatory.

   • Create a new project ESP-IDF -> Create using a sample.
   • Select the target device. Check the correct COM port and set that too.
   • Build and run.
   • Use a terminal window to monitor the serial input from the device.

4. ESP-IDF syntax ex:

ESP_LOGI(TAG, "Turning the LED %s!", s_led_state == true ? "ON" : "OFF");   Log in information(I) level. Prints to the serial
vTaskDelay(CONFIG_BLINK_PERIOD / portTICK_PERIOD_MS);   Delay a given amount of ticks
gpio_reset_pin(BLINK_GPIO); Reset the state of a pin to default
gpio_set_direction(BLINK_GPIO, GPIO_MODE_OUTPUT);   Set direction
gpio_set_level(BLINK_GPIO, s_led_state);    Set pin HIGH or LOW
printf("Hello world!\n");   FreeRTOS printf, writes to the serial

2. As VSCode extension

(instructions)

1. Install VSCode.

2. Install the extension, 'Espressif IDF' from the extensions tab.

3. Ctrl+shift+P : ESP-IDF: Configure ESP-IDF Extension. And follow the config options.

4. For each project use these commands,

   • ESP-IDF: Show Examples Projects
   • ESP-IDF: Set Espressif device target
   • ESP-IDF: SDK Configuration editor
   • ESP-IDF: Select port to use

   To build and flash

   • ESP-IDF: Build your project
   • ESP-IDF: Size analysis of the binaries (Optional)
   • ESP-IDF: Flash your project
   • ESP-IDF: Monitor your device

Also check debugging over VSCode

3. As Eclipse plugin

1. Install the plugin and the tools following instructions here.
2. Use Eclipe plugin similar to ESP-IDE.

Importing a project from VS Code to ESP-IDE

(should be similar for Eclipse+ ESP-IDF plugin)

1. Open ESP-IDF and goto File > Import.
2. Select Espressif > Existing IDF Project.
3. Type in the project name, select the folder and tick Copy project into workspace if you want to make a copy.
4. Click Finish.

Notes on saving power in ESP32

link

Flashing via native USB port in ESP32S2

https://blog.espressif.com/dfu-using-the-native-usb-on-esp32-s2-for-flashing-the-firmware-b2c4af3335f1