Prepare moving radio module support to static library (#19) ...

- Move INT0 ISR back to main module, rearrange radio functions
- Refactoring: Move TX timeout handling back to main module

Add SD card to transmit larger amount of data (#16) ...

- Correct timeout count
- Transmit first block read from SD card
- Receive data read from SD card and print it via USART
- Some minor fixes + improvements

Slow down TX attempts if receiver does not respond for a while (#17) ...

- reduces transmitter power consumption if receiver does not respond for a longer period of time

Even more refactoring! Even better! (#15)

Some more refactoring (#14)

Refactor imeout handling (#13) ...

- move related code to radio
- cancel timeout when "PayloadReady" arrives
- reduce timeout from 1 second to 100 milliseconds
- no delay before transmitting feedback to transmitter
- update README.md

Improve power management, save more power

Move structs back to types.h

Transmit output power and display it along with the temperature

Basic transmitter power management based on receiver RSSI

Receive with timeout

Send response (RSSI) from receiver to transmitter

Allow passing node address

Accurately calculate RF frequency value (#9)

Accept and display failed CRC, sync word tolerance (#6)

Fix output power setting, set frequency deviation (#5)

Read and display RSSI value (#4)

Just some cleanup (#2)

Temp. "log", Unifont, LNA 50 Ohm + high sensitivity

Minor changes ...

- RC calibration is done automatically at power-up
- set RSSI threshold to recommended default

Do not block CPU while waiting to receive temp. reading (#1)

Improve transmission reliability and range

Measure & tx temp, save some power ...

- measure temp. with an MCP9808 and transmit it every ~32 seconds
- try to save power, idle current ~57 uA, seems still a lot

Reduce program size

Functions to transmit and receive an array of bytes

Print whole packet, transmit string, cleanup

Simple Tx-Rx working

TX and RX works - somewhat ...

- both modules don't talk to each other yet, probably some
  initialization is missing

Try to send a byte and receive it...

Send a string