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All Projects → andygeiss → esp32

andygeiss / esp32

Licence: MIT license
Build your own toolchain to develop, test, build and finally deploy a Golang controller to your ESP32 device.

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ESP32

BCH compliance

Build your own toolchain to develop, test, build and finally deploy a Golang controller to your ESP32 device.

Purpose

The Arduino IDE is easy to use. But I faced problems like maintainability and testability at more complicated IoT projects. I needed to compile and flash the ESP32 before testing my code functionality by doing it 100% manually.

This solution transpiles Golang into Arduino code, which can be compiled to an image by using the ESP32 toolchain. Now I am able to use a fully automated testing approach instead of doing it 100% manually.

Process

+--------+    +---------+    +----------+
|  Test  +---->  Build  +---->  Deploy  |
+--------+    +---------+    +----------+

          make                make flash

Important: The Transpiler only supports a small subset of the Golang Language Specification.

Installation

First download and install the latest Arduino IDE into /opt/arduino or change INO_IDE_PATH in the Makefile and necessary packages.

  • Ubuntu:

      sudo apt-get install -y bison flex git gperf libncurses-dev make python

  • Manjaro:

      sudo pip install pyserial

Next run the ESP32 SDK-Installation:

make packages

Look at the examples for more information.

Develop, Test and Build

Change the Arduino port to your current settings by changing the Makefile:

INO_PORT="/dev/ttyUSB0"

Also set the SSID and PASS strings at application/device/controller.go to your WiFi Access Point and start the build process by using:

make

Run the binary at build/device-${ARCH} to simulate your ESP32 device locally.

Connecting to WiFi ...... Connected!

Deploy

Finally use the following command to deploy the image device.img to your real ESP32 device.

make flash

Important: Please ensure that the current user is in the dialout group. Or you will receive a permission denied.

This will create the following output:

2018/08/05 16:04:22 Flashing ...
esptool.py v2.3.1
Connecting....
Chip is ESP32D0WDQ6 (revision 1)
Features: WiFi, BT, Dual Core
Uploading stub...
Running stub...
Stub running...
Changing baud rate to 921600
Changed.
Configuring flash size...
Compressed 607456 bytes to 366770...
Wrote 607456 bytes (366770 compressed) at 0x00010000 in 5.9 seconds (effective 816.9 kbit/s)...
Hash of data verified.

Leaving...
Hard resetting via RTS pin...
2018/08/05 16:04:22 Done.
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