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LilyGo T-ECHO: report correct battery voltage

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recrof 2025-03-23 15:57:33 +01:00
parent a4bb3782a4
commit 0d114ecfbd
3 changed files with 46 additions and 24 deletions
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28
src/helpers/nrf52/TechoBoard.cpp
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@ -22,7 +22,18 @@ void TechoBoard::begin() {
// for future use, sub-classes SHOULD call this from their begin()
startup_reason = BD_STARTUP_NORMAL;
pinMode(PIN_VBAT_READ, INPUT);
delay(200);
pinMode(PIN_PWR_EN, OUTPUT);
digitalWrite(PIN_PWR_EN, HIGH);
pinMode(PIN_BUTTON1, INPUT_PULLUP);
pinMode(PIN_BUTTON2, INPUT_PULLUP);
pinMode(LED_RED, OUTPUT);
pinMode(LED_GREEN, OUTPUT);
pinMode(LED_BLUE, OUTPUT);
delay(200);
pinMode(PIN_TXCO, OUTPUT);
digitalWrite(PIN_TXCO, HIGH);
#if defined(PIN_BOARD_SDA) && defined(PIN_BOARD_SCL)
Wire.setPins(PIN_BOARD_SDA, PIN_BOARD_SCL)
@ -35,6 +46,21 @@ void TechoBoard::begin() {
delay(10); // give sx1262 some time to power up
}
uint16_t TechoBoard::getBattMilliVolts() {
int adcvalue = 0;
analogReference(AR_INTERNAL_3_0);
analogReadResolution(12);
delay(10);
// ADC range is 0..3000mV and resolution is 12-bit (0..4095)
adcvalue = analogRead(PIN_VBAT_READ);
Serial.println(adcvalue);
// Convert the raw value to compensated mv, taking the resistor-
// divider into account (providing the actual LIPO voltage)
return (uint16_t)((float)adcvalue * REAL_VBAT_MV_PER_LSB);
}
bool TechoBoard::startOTAUpdate(const char* id, char reply[]) {
// Config the peripheral connection with maximum bandwidth
// more SRAM required by SoftDevice