Version difference: The new version has the same size as the old version, where
1. The wiring has been thickened, allowing for greater current flow.
2. Supports ESP-01 (not supported in older versions)
3. Added optocouplers, greatly improving module performance
4. Low level control (old version of high level control)
5. Wide voltage input, supports DC 5-12V (old version values support 5V)
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