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Specification
AspectRatio : 16:9
Brand : KEYESTUDIO
BulletPoint1 : KEYESTUDIO V4.0 board is updated with CP2102 USB serial chip, fully compatible with arduino.
BulletPoint2 : 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz quartz crystal, a USB connection, a power jack, an ICSP headers and a reset button.
BulletPoint3 : This microcontroller can be used by connecting it to a computer with a USB cable or power it with an AC to DC adapter. Also, it comes with the USB cable.
BulletPoint4 : BEAUTIFUL LOOK & PACKAGING: cool yellow-black design which is a departure from the standard, dull, black boards, the yellow silk screen on black mask make it easy to read the pin labels
BulletPoint5 : Flash Memory: 32 KB (ATMEGA328P-PU) of which 0.5 KB used by bootloader
ButtonQuantity : 64
ChipsetType : Intel 845, Intel 865
Color : Yellow
CompatibleDevices : Raspberry Pi, Raspberry Pi Zero
ConnectivityTechnology : USB
ConnectorGender : Male-to-Female
ConnectorType : Zif
CustomerPackageType : Standard Packaging
DriveSystem1 : Phillips
DriveSystem2 : Cross
ExteriorFinish : Nickel
ExternallyAssignedProductIdentifier : 9339065522631
ExternallyAssignedProductIdentifier1 : 619206229346
ExternallyAssignedProductIdentifier2 : 0619206229346
ExternallyAssignedProductIdentifier3 : 00619206229346
FinishType : Screw
GpsrSafetyAttestation : 1
GraphicsCardInterface : integrated
GraphicsDescription : Dedicated
HandOrientation : Ambidextrous
HardwareInterface : usb
HardwarePlatform : Laptop
HumanInterfaceInput : buttons
IncludedComponents : 显示器
IndoorOutdoorUsage : indoor
IndoorOutdoorUsage1 : outdoor
IndoorOutdoorUsage2 : indoor
ItemName : KEYESTUDIO V4.0 Development Board for Arduino UNO R3 with USB Cable
ItemPackageDimensions_Height : 11.3 centimeters
ItemPackageDimensions_Length : 2.7 centimeters
ItemPackageDimensions_Width : 8.8 centimeters
ItemPackageQuantity : 1
ItemShape : Round
ItemTypeKeyword : single-board-computers
KeyboardDescription : NO
KeyboardLayout : qwerty
Language : english
MainPowerConnectorType : Barrel Jack (5.5x2.1mm)
Manufacturer : keyes
Material : Plastic
MeasurementSystem1 : Imperial
MeasurementSystem2 : Metric
MemoryClockSpeed : 16 MHz
MemorySlotsAvailable : 2
MemorySpeed : 16 MHz
MemoryStorageCapacity : 32 KB
MetalType1 : Nickel
MetalType2 : Carbon Steel
ModelName : KEYESTUDIO V4.0 Development Board
ModelNumber : KE-0017
NumberOfBoxes : 2
NumberOfDisplaysSupported : 1
NumberOfItems : 1
NumberOfKeys : 3
NumberOfPieces : 200
NumberOfPins : 5
NumberOfPorts : 8
OperatingSystem : Windows 10
PartNumber : KE-0017
PersonalComputerDesignType : all_in_one
Platform : windows_xp
PowerPlugType : type_c_2pin_eu
PowerSourceType : USB-powered from the host laptop
ProcessorCount : 1
ProductDescription : DESCRIPTION

Original cystal : Original ECS-TXO-3225-147.4-TR from USA
Duplex variant of MMDVM_HS_Hat
This PCB uses the MMDVM_HS .
It has two ADF7021 onboard and allows for duplex operation with two time slots on DMR.

Setting Tips:
Modem select: STM32_HS_GPIO
FREQUENCY: UHF 433-900MHz, VHF 144-220 MHz. NOTE: TX =0, RX=0
To leave the screen on all the time In Pi-Star configuration, ensure you have "OLED Type 3" in the display type field at the top of the page, set Port to: modem.
Also, in the Expert section, go to MMDVM host, and scroll down to the OLED section. Make sure LogoScreensaver is set to 1. This leaves the screen on all the time. Otherwise, it goes blank when idle

Package List:
1x MMDVM duplex HotSPOT Module
2x Antenna
2x SMA socket

ProductSiteLaunchDate : 2020-08-31T04:08:50.671Z
RecommendedUsesForProduct : 办公室
Size : SD Card Extension Cable
SpecificationMet : [Inferred: Some specifications met]
SpecificUsesForProduct : Education
Style : 经典的
SupplierDeclaredDgHzRegulation : not_applicable
SwitchType : Membrane
SystemBusStandardSupported : SATA 1
SystemRamType : ddr_dram
TotalExpansionSlotsQuantity : 20
TotalSataPorts : 2
TotalUsbPorts : 1
UnitCount : 4
UnspscCode : 43211500
Voltage : 12 volts
WaterResistanceLevel : not_water_resistant
WirelessCommStandard : infrared
WirelessCommunicationTechnology : Infrared