M5StickC-Plus2 Battery Voltage Measuring Issue when Radio ON
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Measured values are approximatelly 0.8V greater when WiFi or BT are used.
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Here is discharge curve with 0.8V correction.
Correction could not be done easily by substracting the error, because below Battery voltage 3.5V, measurement begins rapidly grow. Device stops work at 3.4V.It is difficult to name this device as a successful design.
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I guess, this is a possible solution for longer battery use.
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It works!
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