eolas/zk/Expressif_IoT_Development_Framework.md

tags
micro-controllers C ESP32

The ESP-IDF is the SDK, provided by Expressif, for programming the ESP32 with C and C++.

Ensure you are a member of the uucp group so that you have serial access, using usermod -a -G uucp $USER

Installation

yay -Sy esp-idf

Pre-requisites:

To use ESP-IDF:

1. Run /opt/esp-idf/install.sh to install ESP-IDF to ~/.espressif.
   You only have to do this once after installing or upgrading
   the esp-idf package.

2. Run `source /opt/esp-idf/export.sh` to add idf.py and idf_tools.py
   to your current PATH. You will have to do this in every terminal
   where you want to use ESP-IDF. Alternatively, you can add
   "source /opt/esp-idf/export.sh" to ~/.bashrc or the equivalent for
   your shell to load ESP-IDF automatically in all terminals.

Must run

. /opt/esp-idf/export.sh

In any terminal where you want to compile to the device.

Compilation/flashing process

To demonstrate compilation, I have copied one of the demo projects provided:

 cp -r /opt/esp-idf/examples/get-started/hello_world .

Initialise the project

To initialise the project, run:

idf.py set-target esp32

Python is used as the client for automated processes/bootstrapping etc, even though the code that runs on the device is written in C.

Check ESP32 is registered as connected to computer you are programming on

Check that ESP32 is registered as connected (after plugging in);

lsusb

Current device listed as ID 10c4:ea60 Silicon Labs CP210x UART Bridge

Silicon Labs CP210x is the USB-to-serial chip on the ESP32 board

Then run:

ls /dev/ttyUSB*

It should return something like:

crw-rw---- 1 root uucp 188, 0 Dec 15 17:57 /dev/ttyUSB0