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set adc width to 13 bits for esp32-s2 (#3117)
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@ -15,6 +15,11 @@ namespace esphome {
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namespace adc {
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static const char *const TAG = "adc";
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// 13 bits for S3 / 12 bit for all other esp32 variants
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// create a const to avoid the repated cast to enum
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#ifdef USE_ESP32
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static const adc_bits_width_t ADC_WIDTH_MAX_SOC_BITS = static_cast<adc_bits_width_t>(ADC_WIDTH_MAX - 1);
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#endif
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void ADCSensor::setup() {
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ESP_LOGCONFIG(TAG, "Setting up ADC '%s'...", this->get_name().c_str());
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@ -23,14 +28,14 @@ void ADCSensor::setup() {
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#endif
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#ifdef USE_ESP32
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adc1_config_width(ADC_WIDTH_BIT_12);
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adc1_config_width(ADC_WIDTH_MAX_SOC_BITS);
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if (!autorange_) {
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adc1_config_channel_atten(channel_, attenuation_);
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}
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// load characteristics for each attenuation
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for (int i = 0; i < (int) ADC_ATTEN_MAX; i++) {
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auto cal_value = esp_adc_cal_characterize(ADC_UNIT_1, (adc_atten_t) i, ADC_WIDTH_BIT_12,
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auto cal_value = esp_adc_cal_characterize(ADC_UNIT_1, (adc_atten_t) i, ADC_WIDTH_MAX_SOC_BITS,
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1100, // default vref
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&cal_characteristics_[i]);
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switch (cal_value) {
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