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ct_clamp: Check sample() return value is not NaN (#921)
Don't try to update CT clamp's state with NaN values returned from the underlaying sensor. A single IO error in the sensor code will cause a NaN to be returned and if we use that in CTClampSensor's floating point maths both sample_sum_ and offset_ will become NaN and from there every future calculation will use the NaN offset_ and return NaN too.
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@ -64,6 +64,8 @@ void CTClampSensor::loop() {
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// Perform a single sample
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float value = this->source_->sample();
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if (isnan(value))
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return;
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if (this->is_calibrating_offset_) {
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this->sample_sum_ += value;
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