每次esp32从深度睡眠唤醒时，值都不正确

Question

我正在测量电池读数，并使用nrf24l01模块将其发送给主机。但是，在重置后的第一次，电池测量值总是不正确。就像从深度睡眠中醒来一样。我不知道如何解决。

void setup() {
  esp_adc_cal_value_t val_type =
  esp_adc_cal_characterize(ADC_UNIT_1, ADC_ATTEN_DB_0, ADC_WIDTH_BIT_11, REF_VOLTAGE, adc_chars);
}

float battery_read(uint8_t channel, adc_atten_t attenuation) {
  float voltage = 0.0;           // calculated voltage
  float output = 0.0;            //output value
  const float battery_max = 4.2; //maximum voltage of battery
  const float battery_min = 3.0; //minimum voltage of battery before shutdown
  float R1 = 100000; // resistance of R1 (100K)
  float R2 = 27000;  // resistance of R2 (27K)
  adc1_channel_t channelNum;
  switch (channel) {
    case (36):
      channelNum = ADC1_CHANNEL_0;
      break;

    case (39):
      channelNum = ADC1_CHANNEL_3;
      break;

    case (34):
      channelNum = ADC1_CHANNEL_6;
      break;

    case (35):
      channelNum = ADC1_CHANNEL_7;
      break;

    case (32):
      channelNum = ADC1_CHANNEL_4;
      break;

    case (33):
      channelNum = ADC1_CHANNEL_5;
      break;
  }
  adc1_config_channel_atten(channelNum, attenuation);
  voltage = esp_adc_cal_raw_to_voltage(analogRead(channel), adc_chars);
  Serial.println(voltage);
  return output = voltage*(R1+R2)/R2;
}