long range radio messenger
Freedom of communication without borders, operators, networks, fees !
Your own network, your own rules !
Long range radio communicator
- PCBWay 3rd PCB Design Contest 2nd place BEST DESIGN !
- Hackaday Prize Community Vote (Bootstrap Award 1.place)
Articles about project:
Hardware features :
- Only single chip SAMD21E18
- QWERTY keyboard - 30 keys (5x6 matrix)
- LCD on HW SPI:
- 1.8 TFT LCD display 128x160 ST7735
- RFM95 long range radio module - 3 freq. by your country
- 18650 li-on Battery charging
- native HW USB for next features like, modem, sniffer ....
Working software features:
- Send message ... compose and send message to specified recipient or broadcast
- 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 status only GOOD/LOW
- Config ... user radio configuration spread factor / power
- check message delivery confirmation
- contact list display and check online contacts
- select recipient or broadcast
- BEST working feature - resend undelivered messages if delivery fail, message is stored with "undelivered" attribute. Every station at power on broadcast "Ready receive status", then if any near station receive this broadcast and have undelivered message automatically try send this messages, if then receive confirmation mark messages in memory as DELIVERED :)
QUESTIONS? >>> CONTACTS ...
STORE - BUY-NOW: Carefully read please !
Frequency for LoRa long range radio module:
- RFM95 - 868Mhz is frequency 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.
- FOR ADVANCED USER !!!
- NOT FOR BEGINNERS !!!
- Firmware is now very basic
- Armachat is now detected as disk drive,
just copy new firmware as simple uf2 file.
- 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
worldwide flat 11eur with tracking number
maybe I send your order in more packages
(To reduce complete package lost)
sending from Slovakia (Heart of Europe)
Due to the pandemic covid19 is shipping extremely slow
and to some countries impossible (Australia)
Price is for one Armachat unit.
Your payment is protected by PAYPAL
There is no automatic order confirmation
(I write you personal email with tracking number)
It can take some time (covid19, holidays ...)