Specification: Power require: 5V2A MCU: F103C8T6 Transceiver IC: ADF7021,Programmable output power: -16dBm to +10dBm TCXO: 14.7456MHz,±2.5 ppm PCB: 40mmx40mmx1.2mm Host: NanoPi NEO 512M RAM,v1.4,A3 Architecture Options USB WiFi: RTL8188CUS Replaceable folding antenna,center frequency 433MHz. External USB port for USB wifi | rtlsdr stick |Usb to Serial connect Nextion 2.x-3.x tft screen OLED: I2C 128*64px SDCard: 32gb Charging cable: Micro USB can transfer data, support 5V2A DOCS: Manual&software wiki.friendlyelec.com/wiki/index.php/NanoPi_NEO wiki.friendlyelec.com/wiki/index.php/NanoHat_OLED **Modem TYPE? ""MMDVM_HS_NPi Hat (VR2VYE) for Nano Pi(GPIO)"" update FW? sudo pistar-vyehsflash nano_hs** www.pistar.uk/beta/Pi-Star_NanoPi_V4.1.5_25-Jun-2021.zip Package included: 1.NanoPi 512M RAM 2.SDCard: 16-32G 3. 50cm data cable 4.NanoHat OLED MMDVM nanopi pistar hotspot setup GUIDE:connect RJ45 cable to hotspot,power up with 5V 2A Phone Charge to ensure and check OLED left LED Flash(not green one) it Mean the RF board Running if not, repower again wait 1 minute the same router computer open http://pi-star mac open http://pi-star.local login:pi-star pass:raspberry http://pi-star/admin/configure.php Radio/Modem Type: set Modem: STM32-DVM-(Pi Hat)GPIO then Save MMDVM Display Type: then select OLED then Save reselect Modem :STM32-DVM-(Pi Hat)GPIO then save you can see the OLED on open http://pi-star/admin/expert/edit_mmdvmhost.php OLED Scroll set 1 Apply Changes the base setting is ok,you can select your Digital Mode now if every thing work well pls don't update the pi-starFAQ: Q:the OLED didn't Work? A:Check the RF board the LED need flash 1s on/off,repower to let it work.Q:the hotspot DMR didn't work?A:go to admin live log download the log file to see what happen