jumbospot &VHF + aluminum shell MMDVM spot Support P25 DMR YSF for raspberry pi

Selling point:Our simplex and duplex syst all use an offset of 0, which is our duplex system. Regardle of simplex or duplex, the offset is 0.We are using high-precision temperature compensated crystals, so it is 0We use high cost TCXO crystal with extremely low bit error rate, offset of 0,and frequency error of 0This item has 7 choosesChoose 1-MMDVM case :Simplex MMDVM board +Aluminum caseChoose 2-with Oled :Simplex MMDVM board with oled displayChoose 3-MMDVM : Simplex MMDVM boardChoose 4-MMDVM OLED CASE :Simplex MMDVM board with oled display +Aluminum caseChoose 5 - MMDVM with pi 8g :1.7version simplex MMDVM board + raspberry pi + 2g tf system card + caseChoose 6-USBDuplex MMDVM :Duplex MMDVM boardChoose 7-USBDuplex with OLED:Duplex MMDVM board with oled displayChoose 8 -mini DuplexChoose 9-mini Duplexwith oledChoose 10-mini Duplexwith oled and caseChoose 11-nano NEO single MMDVMChoose 11-nano NEO single MMDVM with oled

New versionMMDVM Support P25 DMR YSF for raspberry pi

new pi4b need remove R1 .

product description:

ST2_MMDVM_HS HAT Rev1.7 Guide

1.Hardware add (SDA,SCL)R20,R21 Connect st2 i2c 2 bus to OLED,and ra. oled meage pwr on without RPI using mmdvm_hs custom fw,and i2c 2 bus.

2.Support i2c communition with ra

Setting For Pi-star and raspberry hardware (rpi 0-3) new pi4b need remove R1 .

Controller Mode:Simplex Node

Radio Frequency : Freq:144-148,219-225,(Main Band)420-475,842-950

Example:438.000000

Radio/Modem Type:ST2-DVM(GPIO)

14.7456 TCXO with RXOFFSET=0 TXOFFSET=0

Quick start:

1.download imagehttps://www.pistar.uk/downloads/write it to card

2.insert card to rpi

3.wait to boot 5 minutes connect wifiPi-star-setupparaspberry

4.openhttp://pi-star/admin/5.set freq ,dmr id ,dmr mode,add home's wifi id...Default Username: pi-starDefault Paword: raspberry

to support i2c communication change MMDVM_HS code(by Andy Uribe CA6JAU)->Config.h

/ Host communication selection:

/#define ST2_USART1_HOST

/#define ST2_USB_HOST

#define ST2_I2C_HOST

to disable i2c 2 to ra and oled just remove R20,R21

update new FW: (pi-star / expert / h acce / user :pi-star pa:raspberry)

sudo pistar-mmdvmhshatf hs_hat

ps:update new FW no oled pwr on meage.

mode info pls visit

www.mmdvm.club