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HELTEC V3 battery input fix

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richonguzman 2024-04-19 11:06:26 -04:00
parent b00b29a5da
commit ce058ed424
4 changed files with 27 additions and 11 deletions
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15
src/battery_utils.cpp
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@ -25,19 +25,22 @@ namespace BATTERY_Utils {
int sample;
int sampleSum = 0;
for (int i = 0; i < 100; i++) {
#if defined(TTGO_T_LORA32_V2_1) || defined(HELTEC_V2) || defined(HELTEC_HTCT62)
sample = analogRead(batteryPin);
#if defined(TTGO_T_LORA32_V2_1) || defined(HELTEC_V2) || defined(HELTEC_HTCT62) || defined(HELTEC_V3)
sample = analogRead(BATTERY_PIN);
#endif
#if defined(HELTEC_V3) || defined(ESP32_DIY_LoRa) || defined(ESP32_DIY_1W_LoRa)
#if defined(ESP32_DIY_LoRa) || defined(ESP32_DIY_1W_LoRa)
sample = 0;
#endif
sampleSum += sample;
delayMicroseconds(50);
}
float voltage = (2 * (sampleSum/100) * adcReadingTransformation) + voltageDividerCorrection;
return voltage; // raw voltage without mapping
#ifdef HELTEC_V3
double inputDivider = (1.0 / (390.0 + 100.0)) * 100.0; // The voltage divider is a 390k + 100k resistor in series, 100k on the low side.
return (((sampleSum/100) * adcReadingTransformation) / inputDivider) + 0.285; // Yes, this offset is excessive, but the ADC on the ESP32s3 is quite inaccurate and noisy. Adjust to own measurements.
#else
return (2 * (sampleSum/100) * adcReadingTransformation) + voltageDividerCorrection; // raw voltage without mapping
#endif
// return mapVoltage(voltage, 3.34, 4.71, 3.0, 4.2); // mapped voltage
}