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2.5dB could be a more appropriate attenuation for heltec ADCs (#2511)

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Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
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code8buster 2023-05-26 11:16:40 +00:00 committed by GitHub
parent f3af3c1c33
commit 7475c8647c
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3 changed files with 6 additions and 1 deletions
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5
src/Power.cpp
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@ -30,8 +30,11 @@ RTC_NOINIT_ATTR uint64_t RTC_reg_b;
#endif // BAT_MEASURE_ADC_UNIT
esp_adc_cal_characteristics_t *adc_characs = (esp_adc_cal_characteristics_t *)calloc(1, sizeof(esp_adc_cal_characteristics_t));
#ifndef ADC_ATTENUATION
static const adc_atten_t atten = ADC_ATTEN_DB_11;
#else
static const adc_atten_t atten = ADC_ATTENUATION;
#endif
#endif // BATTERY_PIN && ARCH_ESP32
#ifdef HAS_PMU

1
variants/heltec_v3/variant.h
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@ -9,6 +9,7 @@
#define BATTERY_PIN 1 // A battery voltage measurement pin, voltage divider connected here to measure battery voltage
#define ADC_CHANNEL ADC1_GPIO1_CHANNEL
#define ADC_ATTENUATION ADC_ATTEN_DB_2_5 // lower dB for high resistance voltage divider
#define ADC_MULTIPLIER 4.9
#define USE_SX1262

1
variants/heltec_wsl_v3/variant.h
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@ -10,6 +10,7 @@
#define BATTERY_PIN 1 // A battery voltage measurement pin, voltage divider connected here to measure battery voltage
#define ADC_CHANNEL ADC1_GPIO1_CHANNEL
#define ADC_ATTENUATION ADC_ATTEN_DB_2_5 // lower dB for high resistance voltage divider
#define ADC_MULTIPLIER 4.9
#define USE_SX1262