NuMaker-IoT-M263AAug 06, 2019 Page 9 of 50 Rev 1.00NUMAKER-IoT-M263A USER MANUALM -m U2 NUMAKER-IOT-M263A OVERVIEWFront View2.1ICE USB ConnectorVCOM SwitchReset ButtonICE Status LEDOff-line Program ButtonUSB OTG ConnectorPower LEDPB10 LEDVDD SwitchTarget Chip: M263KIAAEArduino UNO Compatible Extension ConnectorExternal VDD ConnectorNu-Link2-MeAmmeterICE Chip: M48SSIDAEExternal VSS ConnectorM263 PlatformExternal VREF ConnectorMini PCIe ConnectorExternal Power JackExternal 5V Power ConnectorExternal GND Power ConnectorMini PCIe UART Power SwitchWi-Fi Module FW Update SwitchMini PCIe Connector Power SwitchWi-Fi Module Power SwitchLoRa Module Power SwitchBluetooth Module Power SwitchMini PCIe Connector Reset ButtonWi-Fi Module: ESP-12FLoRa Module: APC1278LoRa AntennaLoRa Power LEDBluetooth Module: MDBT42Q-PATBluetooth LEDsEnvironment Sensor: BME6809-axis Sensor: BMX055CAN ConnectorRS485 ConnectorButton1Mini PCIe Connector LEDsMicroSD Card Connector Power LEDFigure 2-1 Front View of NuMaker-IoT-M263AFigure 2-1 shows the main components and connectors from the front side of NuMaker-IoT-M263A.The following lists components and connectors from the front view: Target Chip: M263KIAAE (U4) On-board Modules: Wi-Fi Module: ESP12-F (U9) Firmware Update Switch (SW5) Power Switch (SW8) Bluetooth Module: MDBT42Q-PAT (U8) Indicator LED and Connect LED (BT_LED1 and BT_LED2) Power Switch (SW7) LoRa Module: APC1278 (U10) Antenna Connector (J10) Power LED (LORA_POWER) Power Switch (SW9) On-board Sensors: Environmental Sensor: BME680 (U11) 9-axis Sensor: BMX055 (U12) Mini PCIe Connector (CON1) External Power Jack (CON3) External 5V Power Connector (JP9) External GND Power Connector (JP10)