V1.3 MMDVM_HS_Dual_Hat Duplex Hotspot Board Kit For P25 DMR YSF NXDN Raspberry Pi + 2.2" TFT

V1.3 MMDVM_HS_Dual_Hat Duplex Hotspot Board Kit For P25 DMR YSF NXDN Raspberry Pi + 2.2" TFT

Duplex Hotspot Board Kit:
Best version:
1. Latest version V1.3, and the firmware is latest
2. original crystal: 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.

Revision 1.3:
An accidentally deleted 3v3 wire has been added back to the PCB layout. BOM, Mouser cart and stencil stay the same as for rev1.2.

Features:
- High performance 32-bit processor for ARM
- Fully tested
- Supports for DMR, P-25, D-Star and System Fusion
- Onboard LEDs to show status (Tx, Rx, PTT, Mode)
- Up to 10mW RF power
- SMA antenna connector, Antenna included
- Mounts cleanly on all current ones for Raspberry Pi's including the Pi Zero
- The firmware is pre-loaded and is easily upgraded via software.
- Open source 3D printable case available
- UHF 430-450 MHz, 433mhz and 900MHz

Mode Details:
VHF 144 220 Opera FREQ
The upper part is TX, the lower is RX antenna.
UHF+VHF
SMA, antenna
Modem select:STM32_HS_GPIO
Set TX frequency, RX frequency
TX, RX frequency had better 10M or more apart.
SLOT1, SLOT2 support.

2.2" TFT:
Using Method:
Connect to interface for Nextion of the hotspot board, connect the yellow cable to the TX of the hotspot, the blue to the RX of the hotspot, the red to VCC, and the black to GND

Modify mmdvm.ini:
[General]
Callsign=XXX
Id=4600000
Display=Nextion #Open this sentence and remove the front #Enable TFT LCD
Daemon=0
 
[Nextion]
Port=modem #Open this sentence and remove the front #Enable hotspot TFT interface
ScreenLayout=1 #Open this sentence and remove the front #Enable 1
 
You can use it after configuring as above

Package Included:
- 1 x Set of Duplex Hotspot Kit