LoRa Text Messenger. Adjust Your Settings and Chat Freely.

The LoRa messenger is a portable communication device that lets you send text messages

over long* distances without the need for Wi-Fi or cellular networks.

Good for outdoor adventures, remote areas, or group communication.

The PCB is working great, but it must be readjusted to be perfect.

For now, you'll need those parts to assemble the device:

1. Blue pill (128k+ only) or any other compatible stm32 devboard.
2. ili9341 (320x240) TFT with touch and SD card (2.2, 2.4 or 2.8").
3. DS3231 RTC with 3v battery.
4. RA-02 LoRa module.
5. Antenna

Step one. Take some STM32 with a 128k at least. Tested on bluepill with STM32F103CBT7.

So here is a pinouts:

TFT reset - reset

TFT LED - PA2

TFT SS - PA4

TFT DC - PA1

SD SS - PA3

Touch SS - PB11

Touch irq - PB10

LoRa irq - PB9

LoRa reset - PB0

LoRa SS - PA0

LED - PC13

Analog BAT in - PB1

RGB LED - PB8

PIEZO - PB15

MOTOR - PA15

Button - PB12

Step two. Flash firmware or compile sources with arduino. Beware: stm32 v2.6.0 used.

As for arduino compile as alway you do. Or burn provided BIN using st-link .

After TFT being initialized youl'll be taken to setup process to adjust the touch panel.

Follow it while paying attention how fine is this looks)))

You don't need to adjust nothing. After first setup reboot the device as it asks.

Then it ready to go. Double click the BUTTON pin or send an empty message

(just click KB [OK]) to show the menu.

So... you can adjust every setting it shows...

Two or more devices must be at the same setting to chat right.

Can be used as serial terminal. See github page for details and compiled firmware.

https://github.com/Airrr17/LoRa_messenger

Information page.

Thank you! Setup your antenna right! It's very important! And follow the local rules.