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Introduction to ESP32 Programming [Road to RIoT 2017]
The document provides an introduction to programming the ESP32 using the ESP-IDF and Arduino frameworks, detailing the specifications of ESP32 and installation steps for different operating systems. It covers toolchain setup, environment variable configuration, and the process for building and flashing firmware, along with resources for further learning. The text also discusses the trade-offs between using ESP-IDF and Arduino, noting the user-friendliness of Arduino for beginners.
Introduction to ESP32 Programming [Road to RIoT 2017]
- 2. Introduction to ESP32Programming Using ESP-IDF & Arduino Framework
- 3. $ whoami Alwin Arrasyid SoftwareEngineer, DycodeX winter@dycode.com twitter.com/alwin_wint3r github.com/alwint3r
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- 5. CPU: Tensilica Xtensa32-bit dual core, up to 240 MHz, 600 DMIPS. Operating voltage: 3.3V Memory: 448 KB ROM, 520 KB SRAM 16 KB SRAM in RTC, 1 Kbit of eFuse. External Flash: 512 KB to (4 x 16) MiB WiFi (802.11): b/g/n/e/i Bluetooth: v4.2 BR/EDR & BLE Peripherals: GPIOs, PWM, ADC, DAC, I2S, UART, SPI, I2C, CAN, RMII, Cap Touch
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- 13. What is ESP-IDF? ESPIoT Development Framework or abbreviated as ESP-IDF is the official development framework for ESP32. source code: https://github.com/espressif/esp-idf documentation: http://esp-idf.readthedocs.io
- 14. ESP-IDF is builtwith these languages
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- 17. Installation Steps • Downloadrequired software packages (OS specific) • Download & setup xtensa-esp32 toolchain • Download & setup ESP-IDF
- 18. Prerequisites - GNU/Linux(Debian-based) git wget make libncurses-dev flex bison gperf python python-serial Install the following packages using the package manager
- 19. Prerequisites - macOS sudoeasy_install pip Install pip, package manager for python sudo pip install pyserial Install pyserial using pip
- 20. Toolchain Setup -GNU/Linux (Debian-based) https://dl.espressif.com/dl/xtensa-esp32-elf-linux32-1.22.0-61-gab8375a-5.2.0.tar.gz Toolchain for 32 bit system https://dl.espressif.com/dl/xtensa-esp32-elf-linux64-1.22.0-61-gab8375a-5.2.0.tar.gz Toolchain for 64 bit system
- 21. Toolchain Setup -GNU/Linux (Debian-based) $ mkdir -p ~/esp $ cd ~/esp $ tar -xzf ~/Downloads/xtensa-esp32-elf-linux64-1.22.0-61-gab8375a- 5.2.0.tar.gz Download & extract the toolchain to the ~/esp directory.
- 22. Toolchain Setup -GNU/Linux (Debian-based) $ export PATH=$PATH:$HOME/esp/xtensa-esp32-elf/bin "Introduce" the toolchain so the system knows they're there. You can also append above line to the .bashrc, .profile, or .bash_profile, so you only need to do this only once.
- 23. Toolchain Setup -macOS https://dl.espressif.com/dl/xtensa-esp32-elf-osx-1.22.0-61-gab8375a-5.2.0.tar.gz The steps are pretty much the same with the previous one. Only the filename & URL of the toolchain that is different with the GNU/Linux.
- 24. Toolchain Setup -Windows https://dl.espressif.com/dl/esp32_win32_msys2_environment_and_toolchain-20170330.zip You only need to download the toolchain + msys2 environment from this URL & extract the archive to C: drive. Open msys2 terminal & create esp directory inside home folder. $ mkdir -p ~/esp
- 25. ESP-IDF Setup $ cd~/esp $ git clone -- recursive https://github.com/espressif/esp-idf.git Clone the esp-idf repository.
- 26. ESP-IDF Setup -GNU/Linux & macOS $ export IDF_PATH=$HOME/esp/esp-idf Set a new environment variable with the path to ESP-IDF directory as its value. It is recommended to append above line to the .bashrc, .profile, or .bash_profile, so you only need to do this only once.
- 27. ESP-IDF Setup -Windows $ touch /etc/profile.d/export_idf_path.sh Create a user script file inside the C:/msys32/etc/profile.d/ directory. We'll call it export_idf_path.sh. Export the ESP-IDF path $ echo export IDF_PATH=C:/msys32/home/user-name/esp/esp-idf >> /etc/profile.d/export_idf_path.sh
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- 30. Hello World ~/esp/esp-idf/examples/get-started/hello_world Copied fromexamples provided by ESP-IDF.
- 31. ├── main │ ├──component.mk │ └── hello_world_main.c ├── Makefile └── README.md Project Tree
- 32. Build & Flashthe Firmware We need to configure the project first. The configuration includes the serial port of the ESP32 board, the baud rate, and so many more! $ make menuconfig
- 33. Build & Flashthe Firmware $ make -j3 $ make flash $ make monitor $ make -j3 flash monitor Or even better, a one liner!
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- 35. ESP-IDF Component • Hasa C/C++ source & header files • Has a component.mk file • Optionally has Kconfig (configuration) file
- 36. component_name ├── component.mk ├── component_source.c ├──include │ └── component_source.h └── Kconfig ESP-IDF Component Anatomy
- 37. component_name ├── component.mk ├── Kconfig ├──component_source.h └── component_source.c ESP-IDF Component Anatomy
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- 39. Using Arduino forESP32
- 40. Using Arduino forESP32 • Arduino is still the preferred choice among makers • Huge community • Easier to get started with
- 41. Using Arduino forESP32 - Trade-off! • Lose control of the configurations & low level stuff
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- 43. Choose one! ESP-IDF orArduino?
- 45. ESP-IDF + = ascomponent
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- 48. Where to gofrom here?
- 49. ESP32 Learning Resources •Official documentation esp-idf.readthedocs.io • ESP-IDF examples code github.com/espressif/esp-idf/tree/master/examples • Technical Book (Free!) leanpub.com/kolban-ESP32 • Really useful snippets github.com/nkolban/esp32-snippets • ESP32 forum esp32.com
- 50. Code shown duringthis session: github.com/alwint3r/RTR_Surabaya2017
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