GPIO Definition And Interface Diagram for Nano Series hotSPOT(jTA_SPOT)

Intention: Base on HAT GPIO Definition, you can switch to NanoPi, OrangePi.

GPIO Definition for Duplex hotSPOT（Pi3B/3B+/4B/Zero)

GPIO Definition for Nano hotSPOT(NanoPi NEO)

NanoPi_NEO Wiki http://wiki.friendlyarm.com/wiki/index.php/NanoPi_NEO

Orange Pi Zero

Nano hotSPOT PCB 

 Signal at one end of a round point  

Nano hotSPOT 3.3V Fan interface(Use HS board) ↑

PowerSupply2Fan (3V3 suggest)

Nextion LCD for Nano hotSPOT(BlueBox)

It is very easy to add Nextion LCD for Nano hotSPOT(BlueBox),components:  

1) USB to TTL (Suggest CP2102 or CH340)

2) OTG with MicroUSB Cable power  supply

HS RXD to Nextion TX
HS TXD to Nextion RX
HS 5V   to Nextion 5V
HS GND to Nextion GND

Find the component in AliExpress:

https://fr.aliexpress.com/item/CP2102-USB-2-0-to-UART-TTL-5PIN-Connector-Module-Serial-Converter-New-WAVGAT/32796844759.html

https://fr.aliexpress.com/item/Micro-USB-Host-OTG-Cable-HDD-mobile-hard-disk-with-additional-extra-power-charge-microUSB-cable/32811155296.html

LCD protect Case: （Design by @bi7jta）
https://www.bi7jta.org/cart/index.php?route=product/category&path=68

Nextion LCD for Duplex hotSPOT, RPi hotSPOT with fan, Repeater kit board

For Duplex hotSPOT

The are two ways,

1. Use modem in the hotSPOT board, 

4PIN show "LCD", pi-star Config MMDVM Display Type select Nextion -> Modem
HS RXD to Nextion TX
HS TXD to Nextion RX
HS 5V   to Nextion 5V
HS GND to Nextion GND

for Ver1.0.1( !! VCC,GND not same as Ver1.0)

Pi-Star Setting display type

2. Use USB to TTL adapter,

then in pi-star Config MMDVM Display Type select Nextion -> /dev/ttyUSB0

Note: Some USB2TTL adapt not work, had tested CP2102 / CH340 is OK, USB-STC-ISP do not work.
TTL RXD to Nextion TX
TTL TXD to Nextion RX
TTL 5V   to Nextion 5V
TTL GND to Nextion GND

For RPi hotSPOT with fan

1 Use board 4 PINs Display interface, follow the order.

Warning! Can Not Reversal 5V and GND！

2 Use USBtoTTL Adapter

For Repeater kit board

Just can use USBtoTTL Adapter, STM32F105 without serial interface

Nextion firmware download 

From bi7jta ,add show IP address

https://github.com/nano-mmdvm/Duplex_hotSPOT/tree/master/nextion

From G4KLX

https://github.com/g4klx/MMDVMHost/tree/master/Nextion_G4KLX

From facebook group

https://www.facebook.com/groups/Nextion/

About TJC clone LCD ,you can also find in facebook group