Adafruit ESP32-S3 Manual page 210

LC709203 Simple Data Example
Click File > Examples > Adafruit LC709203F > LC709203F_demo to open the
example.
#include "Adafruit_LC709203F.h"
Adafruit_LC709203F lc;
void setup() {
Serial.begin(115200);
delay(10);
Serial.println("\nAdafruit LC709203F demo");
// For the Feather ESP32-S2, we need to enable I2C power first!
// this section can be deleted for other boards
#if defined(ARDUINO_ADAFRUIT_FEATHER_ESP32S2)
// turn on the I2C power by setting pin to opposite of 'rest state'
pinMode(PIN_I2C_POWER, INPUT);
delay(1);
bool polarity = digitalRead(PIN_I2C_POWER);
pinMode(PIN_I2C_POWER, OUTPUT);
digitalWrite(PIN_I2C_POWER, !polarity);
#endif
if (!lc.begin()) {
Serial.println(F("Couldnt find Adafruit LC709203F?\nMake sure a battery is
plugged in!"));
while (1) delay(10);
}
Serial.println(F("Found LC709203F"));
Serial.print("Version: 0x"); Serial.println(lc.getICversion(), HEX);
lc.setThermistorB(3950);
Serial.print("Thermistor B = "); Serial.println(lc.getThermistorB());
lc.setPackSize(LC709203F_APA_500MAH);
lc.setAlarmVoltage(3.8);
}
void loop() {
Serial.print("Batt_Voltage:");
Serial.print(lc.cellVoltage(), 3);
Serial.print("\t");
Serial.print("Batt_Percent:");
Serial.print(lc.cellPercent(), 1);
Serial.print("\t");
Serial.print("Batt_Temp:");
Serial.println(lc.getCellTemperature(), 1);
delay(2000); // dont query too often!
}
After opening the LC709203F_demo file, upload it to your microcontroller. Open the S
erial Monitor at 115200 baud. You should see the following as the sketch starts up.
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