https://github.com/arduino/uno-r4-wifi-usb-bridge

https://github.com/arduino/uno-r4-wifi-usb-bridge

Last synced: about 1 month ago
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• Host: GitHub
• URL: https://github.com/arduino/uno-r4-wifi-usb-bridge
• Owner: arduino
• Created: 2023-03-09T13:11:54.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2024-07-29T12:19:06.000Z (4 months ago)
• Last Synced: 2024-09-29T08:51:20.558Z (about 2 months ago)
• Language: C++
• Size: 340 KB
• Stars: 27
• Watchers: 19
• Forks: 9
• Open Issues: 14
• Metadata Files:
  • Readme: README.md

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README

        
# Arduino UNO R4 WiFi USB Bridge firmware

This firmware uses [arduino-esp32](https://github.com/espressif/arduino-esp32/)

## Update submodules

```

git submodule update --init --depth 1 --no-single-branch

```

## Get the toolchain

```

cd hardware/esp32-patched/esp32/tools

./get.py

```

## Build the firmware

```

./compile.sh

```

Running the compile script will:

1. Compile the firmware using `arduino-cli`

2. Export binaries in the build directory inside the `UNOR4USBBridge` folder 

The `compile.sh` script will produce a bunch of binary files that can be flashed using [esptool](https://github.com/espressif/esptool/releases) from the build directory:

```

esptool --chip esp32s3 --port "/dev/ttyACM0" --baud 921600  --before default_reset --after hard_reset write_flash  -z --flash_mode dio --flash_freq 80m --flash_size 4MB 0x0 "UNOR4USBBridge.ino.bootloader.bin" 0x8000 "UNOR4USBBridge.ino.partitions.bin" 0xe000 "../../../boot/boot_app0.bin" 0x10000 "UNOR4USBBridge.ino.bin"

```

## Package a single binary

```

./export.sh

```

The `export.sh` script will take care of generating a single binary blob including the TLS certificates bundle. Running the export script will:

1. Invoke the `compile.sh` script

2. Generate the certificate bundle using this [script](certificates/gen_crt_bundle.py) and this [certificates list](certificates/certificates.pem)

3. Combine everything in a single binary blob that can be flashed from address 0x0 using [espflash](https://github.com/esp-rs/espflash/releases)

```

espflash write-bin -b 115200 0x0 S3.bin

```

## Update your board

To flash the firmware the board needs to be in `ESP download` mode. This can be done [manually](https://support.arduino.cc/hc/en-us/articles/9670986058780-Update-the-connectivity-module-firmware-on-UNO-R4-WiFi#espflash) or using the [unor4wifi-updater](unor4wifi-updater) script.

Alternatively you can also use the `download.sh` script to update the firmware using the `arduino-cli`. Also in this case the `download.sh` script

should be invoked after putting the board in `ESP download` mode.