Update __init__.py - Error correction + fix PCF8574 multi-output overwrite + I2C lock + persistence + multi-device support#4
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### Summary This PR fixes a critical issue where activating one PCF8574 output would unintentionally disable the others. ### Changes - Write full 8-bit state to PCF8574 (required by hardware) - Added async I2C bus lock - Added persistent state across CBPi4 restarts - Added support for multiple PCF8574 devices (0x20–0x27) - Added sequential relay test action - Updated CBPi4 API imports (CBPiActor) ### Hardware tested - Raspberry Pi 4 - PCF8574 - ULN2803 relay driver - Relays active LOW ### Result - Outputs are now fully independent - Multiple relays can be active simultaneously - Stable behavior under concurrent actor updates
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I will look into it, but it'll take some time as I will be travelling the next coouple of days. Quick question after brief review: Where do you get the "/tmp/pcf8574_state.json" file from. This might not be working for others. |
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It was a suggestion from chatGPT. |
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Summary
This PR fixes a critical issue where activating one PCF8574 output would unintentionally disable the others.
Changes
Hardware tested
Result