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Bug: DallasTemperature::readPowerSupply(const uint8_t* deviceAddress) sends reset at end of command #233

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bonnyr opened this issue Dec 16, 2022 · 0 comments

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@bonnyr
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bonnyr commented Dec 16, 2022

Observed when running sensor.begin().
The library checks the power supply mode by reading the power supply. It then issues a reset sequence.

According to the docs, the master sends a reset when starting a transaction, not when finishing one.
Below is a pulseview image showing the behaviour :
image
The diagram shows a match rom command (0x55) followed by Read Power command (0xb4) immediately followed by a reset pulse.

Then another reset is being issued when starting a new command as can be seen below:

image

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