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Developer-RU
ESP32-DFU-iOS
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Troubleshooting
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Masyukov Pavel edited this page
May 24, 2026
·
1 revision
Troubleshooting
No Devices Found
Verify Bluetooth is enabled.
Verify ESP32 is advertising DFU UUID.
Increase scan duration.
Upload Fails
Keep phone close to device.
Lower MTU setting.
Adjust PRN value.
Recheck firmware binary validity.
Validation Errors
Rebuild firmware from clean environment.
Ensure metadata format matches firmware parser.
Reconnect Failures
Check device power stability.
Confirm device re-advertises after disconnect.
Retry with auto reconnect disabled for baseline diagnostics.
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Home
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DFU Protocol
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Getting Started
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Release Process
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Troubleshooting
Troubleshooting
No Devices Found
Upload Fails
Validation Errors
Reconnect Failures
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