Hi everyone,
I’m having an issue with Wio-E5 Mini modules where all non-radio functionality works correctly, but any code that uses the radio (P2P LoRa) fails on some units.
Summary
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I have 4 Wio-E5 Mini modules total
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2 modules work perfectly with P2P LoRa (TX/RX)
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2 modules show the issue described below
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All modules behave identically for non-radio code
What works (on all 4 modules)
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Onboard LED blinking
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External RGB LED control using PWM
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General GPIO functionality is stable
What does NOT work (on 2 out of 4 modules)
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Any P2P LoRa transmitter or receiver example
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Any sketch that initializes or uses the radio
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Radio-related code:
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Takes an unusually long time to initialize, or
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Appears to hang / never proceeds once radio functions are called
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Observations
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The exact same firmware and code:
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Works correctly on 2 modules
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Fails consistently on the other 2 modules
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The issue seems to occur during radio initialization
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This suggests a possible hardware, configuration, or factory programming difference
What I’ve tried
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Multiple P2P LoRa TX and RX examples
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Reflashing the same firmware to all modules
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Verified board selection, power supply, and wiring
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Standalone testing with minimal code
At this point, I’m unsure whether this is related to:
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A hardware defect in the radio section on certain modules
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A missing or incorrect radio configuration
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A known batch or revision issue
I’d really appreciate any guidance.