Get Bottom2 power connection status with a code.

ioamas

How can I monitor the status of the power connection through the pogo pins on the Bottom2 module? Are there any specific methods or code examples for detecting power presence or absence?

M5.Lcd.setCursor(startX, currentY);
float vinVoltage = M5.Axp.GetVinVoltage();
bool hasUsbPower = (vinVoltage > 4.5);
bool hasBackPower = M5.Axp.isCharging(); // Check if charging via any source
M5.Lcd.setTextColor(WHITE);
M5.Lcd.print(F("USB-C: "));
M5.Lcd.setTextColor(hasUsbPower ? PAL_GREEN : RED);
M5.Lcd.printf("%.1fV", vinVoltage);
currentY += lineSpacing;

M5.Lcd.setCursor(startX, currentY);
M5.Lcd.setTextColor(WHITE);
M5.Lcd.print(F("Back: "));
M5.Lcd.setTextColor(hasBackPower ? PAL_GREEN : RED);
if (hasBackPower && !hasUsbPower) { // Only show back power if it's the source
    M5.Lcd.printf("%.1fV", M5.Axp.GetVBusVoltage());
} else {
    M5.Lcd.print(" --");
}
currentY += lineSpacing;

// Check battery level
M5.Lcd.setCursor(startX, currentY);
float batteryLevel = M5.Axp.GetBatteryLevel();
M5.Lcd.setTextColor(WHITE);
M5.Lcd.print(F("Battery: "));
M5.Lcd.setTextColor(batteryLevel > 20 ? PAL_GREEN : RED);
M5.Lcd.printf("%d%%", (int)batteryLevel);
currentY += lineSpacing;

kuriko

@ioamas
According to the schematic diagram, the 5V of the Pogo pin is directly connected to the VIN pin. So I think maybe you can determine whether the Pogo pin is connected by judging whether the battery is connected