arduino-esp32-wifi-scan-sdk

arduino-esp32-wifi-scan-sdk

This example demonstrates how to integrate with the ESP-IDF SDK via CMake and how to use the Arduino Wi-Fi library to scan for nearby networks from Swift. This example is specifically made for the RISC-V MCUs from ESP32 (the Xtensa MCUs are not currently supported by Swift).

Requirements

• Set up version v5.4 (required for this arduino-esp32 version) of the ESP-IDF development environment. Follow the steps in the ESP32-C6 "Get Started" guide.
  • Make sure you specifically set up development for the RISC-V ESP32-C6, and not the Xtensa based products.
  • If you have a different version of ESP-IDF installed, make sure to also delete ~/.espressif before running install.sh

rm -rf ~/esp-idf ~/.espressif # Remove old installation files
git clone --recurse-submodules https://github.com/espressif/esp-idf.git ~/esp-idf
cd ~/esp-idf
git checkout release/v5.4
git submodule update --init --recursive
./install.sh
idf_tools.py install-python-env
. ./export.sh

• Before trying to use Swift with the ESP-IDF SDK, make sure your environment works and can build the provided C/C++ sample projects, in particular:
  • Try building and running the "get-started/blink" example from ESP-IDF written in C.

Building

• Make sure you have a recent nightly Swift toolchain that has Embedded Swift support.
• If needed, run export.sh to get access to the idf.py script from ESP-IDF.
• Specify the nightly toolchain to be used via the TOOLCHAINS environment variable and the target board type by using idf.py set-target.

cd arduino-esp32-wifi-scan-sdk
export TOOLCHAINS=...
. <path-to-esp-idf>/export.sh
idf.py set-target esp32c6
idf.py build

Running

• Connect any board with an ESP32-C6
• Connect the RX and TX pins of your USB-UART converter to the TX0 and RX0 respective pins of your board. You may also need to connect the GND converter pin to the GND pin of the board.
• Use idf.py to upload the firmware and to run it:

idf.py flash monitor

• You should see a list of discovered Wi-Fi APs being printed every 5 seconds