Accessories Conversion module USB to TTL serial port module Product parameters brand: Firefly size: 29mm*19mm Technical data Driver download: http://www.prolific.com.tw/US/ShowProduct.aspx?pcid=41 Real figure Connection methods Wireless module EC20 4G Module suite Product parameters model EC20-C R2.0 Mini PCIe-C supply voltage 3.3V~ 3.6V, Typical values: 3.3V Working frequency band TDD-LTE: B38/B39/B40/B41 FDD-LTE: B1/B3/B8 WCDMA: B1/B8 TD-SCDMA: B34/B39 GSM: 900/1800 data transmission TDD-LTE: Max 130Mbps (DL) Max 35Mbps (UL) FDD-LTE : Max 150Mbps (DL) Max 50Mbps (UL) DC-HSPA+: Max 42Mbps (DL) Max 5.76Mbps (UL) UMTS: Max 384Kbps (DL) Max 384Kbps (UL) TD-SCDMA: Max 4.2Mbps (DL) Max 2.2Mbps (UL) CDMA: Max 3.1Mbps (DL) Max 1.8Mbps (UL) EDGE: Max 236.8Kbps (DL) Max 236.8Kbps (UL) GPRS: Max 85.6Kbps (DL) Max 85.6Kbps (UL) Interface connector USB: USB 2.0 high-speed interface, 480Mbps digital voice: 1 digital voice interface (optional) USIM:1.8V/3V network indicator: ×2, NET_STATUS 和 NET_MODE UART:×1 UART reset: low level PWRKEY: low level antenna interface: 3 (main antenna, diversity antenna and GNSS antenna interface) ADC:×2 Structure size 51.0mm × 30.0mm × 4.9mm weight about 10.5g certification CCC/ NAL*/ TA Real figure Connection methods USB connection Mini-PCIe connection Refer to the firmware Public firmware supports EC20 4G module by default. Power adapter Product parameters product: USB power adapter specification: US/EU standard input standard: AC110-240V 50/60Hz output standard: 12V-2A Note : the AIO-3328-JD4 all-in-one machine needs power supply of 12V/2A for normal operation. If the current is lower than 2A, it may be restarted abnormally due to low current. In order to ensure the normal operation of the development board, please use power supply with voltage of 12V and current of 2a-3a.Recommend the use of Firefly website power accessories. Real figure IR remote control Product parameters product: 12-key infrared remote control version: customized version of Firefly power supply: two no.7 batteries adaptation: AIO-3328-JD4 description: support remote startup function of AIO-3328-JD4 development board Real figure The key code The IR wiring position of AIO-3328-JD4 is shown in the red box below The cooling suite Aluminum heat sink Accessories parameters adapter : AIO-3328-JD4 size : 43mm (L)* 39.5mm(W)*11mm(H) Installation