49 lines
1.6 KiB
C++
49 lines
1.6 KiB
C++
float _sensor_battery_saveMode = nan("no battery");
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uint16_t energySavingIterations = 0;
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// Copied from https://arduinodiy.wordpress.com/2016/12/25/monitoring-lipo-battery-voltage-with-wemos-d1-minibattery-shield-and-thingspeak/
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float battery_voltage() {
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// ESP8266 ADC pin input voltage range ist 0V .. 1V
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// The Wemos D1 mini does already contain a voltage divider circuit: A0(Wemos PCB) -- [220kOhm] -- ADC (ESP8266)-- [100kOhm] -- GND
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// The (+) pole of the battery is connected to the A0 pin of the Wemos board through a additional 100kOhm resistance.
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// The battery voltage of 4.2V max is measured as 1.0V on ESP8266 ADC pin.
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uint16_t raw = analogRead(A0);
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float volt = raw / 1023.0;
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return volt * 4.2;
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}
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float battery_charging() {
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if (LOW == digitalRead(BAT_CHARGING_PIN)) {
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return BAT_CHARGE_STATE_CHARGING;
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} else if (LOW == digitalRead(BAT_CHARGED_PIN)) {
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return BAT_CHARGE_STATE_CHARGED;
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}
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return BAT_CHARGE_STATE_NOTCHARGING;
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}
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int energySavingMode() {
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// Give the solar panel some time to load the cell to prevent
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// flapping.
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if (energySavingIterations > 0) {
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energySavingIterations--;
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_sensor_battery_saveMode = ENERGY_SAVE_MODE_ENABLED;
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return 1;
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}
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// Is the battery low?
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if (currentSensorData[SENSOR_BAT_VOLTAGE] <= BAT_LOW_VOLTAGE) {
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// Entering energy saving
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energySavingIterations = ENERGY_SAVING_ITERATIONS;
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_sensor_battery_saveMode = ENERGY_SAVE_MODE_ENABLED;
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return 1;
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}
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_sensor_battery_saveMode = ENERGY_SAVE_MODE_DISABLED;
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return 0;
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}
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float isEnergySavingMode() {
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return _sensor_battery_saveMode;
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}
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