Merge pull request #10 from gitdode/ack ...

Send response and wait for it with timeout

Update README.md

Receive with timeout

Send response (RSSI) from receiver to transmitter

Allow passing node address

Fix transmission of arbitrary additional package ...

...caused by writing one extra garbage byte to FIFO

Update README.md

Accurately calculate RF frequency value (#9)

Frequency deviation/receiver bandwidth (#8) ...

- 10/20 kHz is enough to remove temperature susceptibility
- fix display of negative temperature values

Resolve suspectibility to temperature changes ...

- increase transmitter frequency deviation to 40 kHz
- increase receiver bandwidth to 80 kHz
- (almost) fix display of negative temperature values

Better sprintf

Set frequency deviation accurately to 40 kHz

Update README.md

Resolve suspectibility to temperature changes (#7) ...

- increase transmitter frequency deviation to 40 kHz
- increase receiver bandwidth to 80 kHz
- (almost) fix display of negative temperature values

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

Update README.md

Update README.md

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

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Read and display RSSI value (#4)

Set Fading Margin Improvement as recommended in datasheet

Allow to pass bg and fg color for monochrome bitmaps and fonts (#3)

Update README.md

Update README.md

Update README.md

Just some cleanup (#2)

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

Some cleanup, simplify, comments

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)