Vin: This pin can be used to power the board with a regulated 5V source.It ranges from 5V to 6V (6V is the Maximum) Q: I plugged the board, I can see the serial port but I cannot upload sketchĪ: If still on, remove the conductive foam that protects the pins.Ī: VIN Nominal voltage value is 5V. Q: I plugged the board to my PC / MAC but I cannot see the serial port listed in the IDE, so I can't upload my sketch to the board!Ī: The first thing to try is to manually put the board into bootloader mode, this is accomplished by quickly pressing the reset button twice (you may need a pencil to push the button). The second thing to try is to try another USB cable: some micro-USB cables are "power only", you'll see the board is powered but won't get a connection to the PC. Blink example or other sketcthes that uses pin 13 for on board LED may need to be changed to work properly. Onboard LED: On MKR WAN 1300 the onboard LED is connected to D6 and not D13 as on the other boards. It is therefore normal to have the board properly running on battery power without the LED ON being lit. This maximizes the usage of the energy stored in the battery. This means that it lits up when power is from USB or VIN, but stays off when the board is running on battery power. It is not connected to the battery power. LED ON: This LED is connected to the 5V input from either USB or VIN. This voltage is 3.3V if USB or VIN is used and equal to the series of the two batteries when they are used VCC: This pin outputs 3.3V through the on-board voltage regulator. It is unregulated and the voltage is taken directly from the inputs. This pin is an INPUT.ĥV: This pin outputs 5V from the the board when powered from the USB connector or from the VIN pin of the board. This is the only way you can supply 5v (range is 5V to maximum 6V) to the board not using USB. If the power is fed through this pin, the USB power source is disconnected. Vin: This pin can be used to power the board with a regulated 5V source. Polarity : as reported on the silk in the bottom of the board, positive pin is the closest to the USB connector Batteries, Pins and board LEDsīattery capacity: The connected batteries must have a nominal voltage of 1.5Vīattery connector: If you want to connect a battery pack (2x AA or AAA) to your MKR WAN 1300 use the screw terminal block. Please note: for best result, do not attach the antenna to a metallic surface like car chassis, etc. Please check that it can accept frequencies in the LoRa's range (433/868/915 MHz). The MKR WAN 1300 has to be used with GSM antenna that can be attached to the board with the micro UFL connector.
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