In both cases there will be a cable that ends with a micro USB that goes into the MKR WiFi 1010 socket. The first step is to connect the board to a source of energy, this can be your computer or a phone charger. The pushbutton, used for one of the sketches goes between D8 and GND. This happens if the battery is charged at some level and it is unlikely that your battery is so discharged that it won’t power up the MKR WiFi 1010. This tutorial is more of a conceptual one than a practical one, because there is not much we are going to do on the hardware side: just connect your Li-Po battery to the connector and see the board spring up to life. WiFiNINA library (explained later in this tutorial)Ĭircuit with board, Li-Po battery and a button.
If you are going to use a Li-Po battery, it is useful to understand how to reduce power consumption using the ArduinoLowPower Library and the Wi-Fi LowPowerMode. Your MKR board has all the circuitry to use a Li-Po battery, charging it when there is power coming from VIN or USB, or using it as main power supply when there is no other source available. Lcd.The MKR WiFi 1010 board is designed to run on a Li-Po battery. Serial.begin(9600) // opens serial port, sets data rate to 9600 bps Int pinCount = 10 // the number of pins (i.e. Int ledPins = // an array of pin numbers to which LEDs are attached LiquidCrystal lcd(rs, en, d0, d1, d2, d3) So if we multiply input analogValue to (5/1024), then we get the digital value of input voltage.Ĭonst int rs = 12, en = 13, d0 = A0, d1 = A1, d2 = A2, d3 = A3 The ADC converter will map input voltages between 0 and 5 volts into integer values between. The Arduino Uno ADC is of 10-bit resolution. If only five LEDs are on, the batter is at half strength. So, if all ten LEDs are lit, the battery is at full strength. The values we convert will display on the LED bar graph where it can project the strength. Then, we can convert the analog value into a digital voltage value by using the ADC conversion formula. The Arduino's analog pin acts as a simple voltmeter where the voltage value is retrieved. It can be understood as the amount of voltage contained in your battery. It is good to understand that batteries have what we call a level of charge. How Does This Project Measure the Battery Level? Like any other LED, when connecting the LED bar to your microcontroller, you have to connect the anode pins to the positive side and the cathode pin using a resistor at the end to ground. In our project, we will use it as a battery level indicator. It has various applications including audio equipment and industrial control panel. The LED bar graph is an LED array of 10 individual LEDs with 10 output pins.
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