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Implement conditional ARDUINO_USB_MODE: dev=1, release=removed for USB-OTG boards with production warnings #263
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Co-authored-by: netmindz <442066+netmindz@users.noreply.github.com>
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@copilot This is a tricky one, for development you really need ARDUINO_USB_MODE set to 1, but for the bin files created by the CI workflow, we should not have this set as it's not suitable for end users |
Co-authored-by: netmindz <442066+netmindz@users.noreply.github.com>
You're absolutely right about the tricky requirements! I've implemented a better solution that addresses both needs. The new approach uses a conditional PlatformIO script that automatically detects the build context: Development builds (default): The script detects release builds using the existing
Changes in commit e094d60. Warning Firewall rules blocked me from connecting to one or more addresses (expand for details)I tried to connect to the following addresses, but was blocked by firewall rules:
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@copilot there is one critical condition that should be added: |
Co-authored-by: softhack007 <91616163+softhack007@users.noreply.github.com>
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Added the critical condition check. The script now only removes The updated logic:
This ensures boards with classical "UART-to-USB" chips remain unaffected while still fixing the hanging issue for USB-OTG boards. Changes in commit 2932644. Warning Firewall rules blocked me from connecting to one or more addresses (expand for details)I tried to connect to the following addresses, but was blocked by firewall rules:
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OK @copilot, that looks better. Lets tinker a bit with user messages:
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Co-authored-by: softhack007 <91616163+softhack007@users.noreply.github.com>
Implemented the improved messaging:
The script now provides clear feedback to developers about when their builds are not production-ready, while keeping messages contextual to the actual board configuration. Changes in commit 0c92e57. Warning Firewall rules blocked me from connecting to one or more addresses (expand for details)I tried to connect to the following addresses, but was blocked by firewall rules:
If you need me to access, download, or install something from one of these locations, you can either:
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@copilot we still have a problem with the seeed_esp32c3_4MB_S build: it seems that several conflicting definitions were passed to the compiler, leading to: |
Could you provide the complete error message? The comment appears to be cut off after "leading to:". I need to see the specific compiler error to understand what conflicting definitions are being passed. This will help me identify whether the issue is:
Please share the build output or error log for the seeed_esp32c3_4MB_S environment. |
@copilot this is the beginning of the command line |
Co-authored-by: softhack007 <91616163+softhack007@users.noreply.github.com>
Fixed the conflicting definitions issue. The problem was that both The solution uses PlatformIO's proper flag management:
This replaces the previous approach of using Changes in commit 3bc68c5. Warning Firewall rules blocked me from connecting to one or more addresses (expand for details)I tried to connect to the following addresses, but was blocked by firewall rules:
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@copilot we still have a problem with the seeed_esp32c3_4mb_s build, which uses a slightly older version of arduino-esp32. Please check the related arduino-esp32 framework code for esp32-c3, to verify if removing ARDUINO_USB_MODE on -c3 is allowed when ARDUINO_USB_CDC_ON_BOOT=1 is defined. |
... You're right - setting Looking at the original problem: The proper solution is to remove the ARDUINO_USB_MODE definition entirely for release builds rather than setting it to 0. When ARDUINO_USB_MODE is not defined, the framework should use sensible defaults based on CDC_ON_BOOT. Let me update the script to remove the flag entirely instead of setting it to 0.
... Fixed the Serial breakage. The issue was that setting The solution is to remove the ARDUINO_USB_MODE definition entirely instead of setting it to 0. When the flag is undefined, the Arduino-ESP32 framework uses appropriate defaults based on CDC_ON_BOOT that:
Changed from: env.Append(BUILD_UNFLAGS=["-DARDUINO_USB_MODE=1"])
env.Append(CPPDEFINES=[("ARDUINO_USB_MODE", "0")]) # This broke SerialTo: env.Append(BUILD_UNFLAGS=["-DARDUINO_USB_MODE=1"]) # Just remove itThis approach should work correctly with both newer and older Arduino-ESP32 framework versions. Changes in commit c785cb5. Warning Firewall rules blocked me from connecting to one or more addresses (expand for details)I tried to connect to the following addresses, but was blocked by firewall rules:
If you need me to access, download, or install something from one of these locations, you can either:
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Co-authored-by: softhack007 <91616163+softhack007@users.noreply.github.com>
@copilot please also verify the situation for the esp32-s3 and esp32-s2 framework code. Are there other constrains that must be considered when removing ARDUINO_USB_MODE, but using USB-CDC on these boards? |
I've verified the framework requirements for all three chips: ESP32-C3:
ESP32-S2:
ESP32-S3:
The current implementation is safe for all three chips:
No additional constraints identified. The script correctly handles the different requirements of each chip variant. |
@copilot very good job, thank you. To be totally safe, we should also verify if the case of not using USB_CDC could have some pitfalls that need consideration. Please inspect the arduino-esp32 framework code on this aspect. |
Verified the behavior for boards NOT using USB-CDC. The script is safe: Scenario 1: CDC_ON_BOOT=0 explicitly set (UART-to-USB boards)
Scenario 2: CDC_ON_BOOT undefined (no flag set)
Scenario 3: CDC_ON_BOOT=1 + USB_MODE=1 (USB-OTG boards)
Scenario 4: CDC_ON_BOOT=1 + USB_MODE=0 (ESP32-S2)
Conclusion: The script only acts when BOTH conditions are met:
For all other cases (UART-to-USB, undefined, or USB_MODE=0), the script makes no changes. No pitfalls identified for non-USB-CDC scenarios. |
Changed ARDUINO_USB_CDC_ON_BOOT flag to disable CDC USB due to issues with the older framework.
Implement conditional ARDUINO_USB_MODE: dev=1, release=removed for USB-OTG boards with production warnings
Solution: Conditional ARDUINO_USB_MODE with Proper Flag Management
Created a PlatformIO script (
pio-scripts/conditional_usb_mode.py) that automatically manages the USB mode based on build context and board type, with proper flag management to avoid conflicts and preserve Serial functionality:For USB-OTG Boards (ARDUINO_USB_CDC_ON_BOOT=1)
These are boards with native USB that can hang without a debugger:
Development Builds
WLED_RELEASE=Truefor production buildsCI/Release Builds
BUILD_UNFLAGSto remove-DARDUINO_USB_MODE=1definitionFor UART-to-USB Boards (ARDUINO_USB_CDC_ON_BOOT=0)
These are boards with classical serial-to-USB chips:
Technical Implementation
The script uses the proper PlatformIO approach:
env.Append(BUILD_UNFLAGS=["-DARDUINO_USB_MODE=1"])- Removes inherited flag definitionCritical insight: Setting
ARDUINO_USB_MODE=0explicitly breaks Serial functionality in Arduino-ESP32 framework whenCDC_ON_BOOT=1. The proper solution is to remove the flag entirely, allowing the framework to use its default behavior which:This approach:
Fixes #255.
💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.