ARMACHAT
long range radio messenger
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Freedom of communication without borders,
operators, networks, fees !
Your own network, your own rules !
Long range radio communicator
AWARDS
- PCBWay 3rd PCB Design Contest 2nd place BEST DESIGN !
- Hackaday Prize Community Vote (Bootstrap Award 1.place)
Articles about project:
Hardware features :
- Only single module Rasbery pi PICO
- QWERTY keyboard - 36 keys (6x6 matrix)
- LCD on HW SPI:
- 2.8" IPS LCD display 320x240 ST7789
- RFM95 long range radio module - 2 freq. by your country
- Beeper
- 18650 Battery charging
- native HW USB ....
Working software features:
- Send message ... compose and send message to specified recipient
- Receive message ... message is received on background and stored in memory.
- Message editor ... write message about +/- 80 characters long ... 80 is now best readable on full display ....
- Message memory ... all send/received messages are stored in memory
- Display memory ... display memory content
- Battery ... display voltage
- Config ... user radio configuration spread factor / power
- check message delivery confirmation
-
PROJECT PAGE:
armawatch-armachat-long-range-radio-messengers
SOURCE CODE:
https://github.com/bobricius/Armachat-circuitpython
FACEBOOK GROUP:
facebook.com/groups/armachat/
QUESTIONS?
CONTACTS ...
Carefully read please !
Frequency for LoRa long range radio module:
- 868Mhz is for EU
You can select in setup 915Mhz for US but you can decrease performance,
I do not know how much, there is no universal module (I asked in HopeRF)
On my quick outdoor test I am not see difference.
- 915Mhz is for USA
- 433Mhz not available.
- Check LoRa frequency in your country,
thethingsnetwork.org/docs/lorawan/frequencies-by-country
Armachat have no radio device certification, use on your resposibility.
Important notes:
- FOR ADVANCED USER !!!
- NOT FOR BEGINNERS !!!
- Firmware is now very basic CHECK WORKING SOFTWARE FEATURES
MSD Bootloader:
- Armachat is now detected as disk drive,
just copy new firmware as simple uf2 file.
Communication distance:
- Hard to say ... there is lot variables, antenna, settings, obstacles
( Standard RFM95 20dB output, spread factor 12, 2dB antenna )
- 700m unit on garden desk
- 1500m unit in window
- 4300m unit on attic window, but not reliable
Shipping:
-
worldwide flat 19eur with tracking number
-
maybe I send your order in more packages
(To reduce complete package lost)
-
sending from Slovakia (Heart of Europe) no Custom fees inside EU.
Package content:
After order:
