Golioth Example Upload Image

Overview

This firmware uploads large files to an Amazon S3 bucket. It demonstrates capturing an image with a camera and uploading using the Golioth Firmware SDK for blockwise upload.

The application will connect to Golioth and await user input.

• Pressing button1 will capture and upload an image.
• Pressing button2 will upload a 2246 byte text file.
• Calling capture_image with the Golioth RPC service will remotely trigger image capture and upload.
• The Pipeline found in the pipelines folder is responsible for routing the image upload. By default it will be sent to an Amazon S3 bucket. Captured images are jpg format.

Supported Boards

Vendor	Model	Zephyr name
Espressif	ESP32-DevkitC	esp32_devkitc_wrover
Nordic	nRF9160 DK	nrf9160dk_nrf9160_ns
NXP	i.MX RT1024 Evaluation Kit	mimxrt1024_evk

Camera connections

This demo uses the Arducam Mega 5MP-AF model.

Function	Arducam Pin	nRF9160DK	esp32	mimxrt1024_evk
VCC	1 (red)	VDD1	3.3V	3.3V (J20.08)
GND	2 (black)	GND	GND	GND (J20.12)
CS	6 (orange)	P0.10	GPIO15	b1_13 (J18.08)
MOSI	5 (yellow)	P0.11	GPIO13	b1_14 (J18.12)
MISO	4 (brown)	P0.12	GPIO12	b1_15 (J18.10)
SCK	3 (white)	P0.13	GPIO27	b1_12 (J18.06)

ESP32 Extra Setup

Connect two momentary push buttons as follows:

• Button1: GPIO26---Switch---GND
• Button2: GPIO27---Switch---GND

NXP mimxrt1024_evk Extra Setup

The switch labelled SW4 serves as Button 1. Connect one additional momentary push button as follows:

• Button2: b1_10 (J18.2)---Switch---GND

Data Route Setup

• Create an Amazon S3 bucket and generate a credential that allows upload to it.
• Use add the contents of the YAML file in the pipelines directory of this repository to your Golioth project.
• Use your S3 credential to set up the follow secrets in your Golioth project:
  • AWS_S3_ACCESS_KEY
  • AWS_S3_ACCESS_SECRET

You may follow the Local Setup guide to build your own firmware, or download and use the precompiled binary from the latest release. Note that you will need to add Golioth PSK-ID/PSK to your device before it can connect to Golioth.

Local Setup

:important: Do not clone this repo using git. Zephyr's west meta tool should be used to set up your local workspace.

Install the Python virtual environment

cd ~
mkdir example-upload-image
python -m venv example-upload-image/.venv
source example-upload-image/.venv/bin/activate
pip install wheel west

Initialize and install

Run one of these two initializations based on your target board:

# Initalize for Zephyr
cd ~/example-upload-image
west init -m git@github.com:golioth/example-upload-image.git --mf west-zephyr.yml .

# Initalize for NCS (Nordic boards only)
cd ~/example-upload-image
west init -m git@github.com:golioth/example-upload-image.git --mf west-ncs.yml .

Fetch dependencies and configure the build environment

west update
west zephyr-export
pip install -r deps/zephyr/scripts/requirements.txt

Building the application

Prior to building, update CONFIG_MCUBOOT_IMGTOOL_SIGN_VERSION in the prj.conf file to reflect the firmware version number you want to assign to this build.

Then run the following commands to build and program the firmware based on the device you are using.

Zephyr build commands

Choose the build command for your board.

# ESP32
west build -p -b esp32_devkitc_wrover --sysbuild app
west flash

# mimxrt1024
west build -p -b mimxrt1024_evk --sysbuild app
west flash

NCS build commands

west build -p -b nrf9160dk_nrf9160_ns app
west flash

Configure Authentication credential

Configure PSK-ID and PSK using the device shell based on your Golioth credentials and reboot:

   uart:~$ settings set golioth/psk-id <my-psk-id@my-project>
   uart:~$ settings set golioth/psk <my-psk>
   uart:~$ kernel reboot cold

Features

This example implements the following Golioth services

• Runtime credentials
• Backend Logging
• Device Settings
• OTA Firmware Update
• Remote Procedure Call (RPC)
• Stream data using block upload

Switch Between Zephyr and NCS

After initializing your local repository, you may switch between building for Zephyr boards and building for NCS boards by using the following commands:

Switch to NCS Build

west config manifest.file west-ncs.yml
west update

Switch to Zephyr Build

west config manifest.file west-zephyr.yml
west update

Footnotes

1. For the nRF9160DK, change the VDD IO switch (near the power switch) to 3V. ↩