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

Fix transmission of arbitrary additional package ...

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

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

Set frequency deviation accurately to 40 kHz

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)

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

Read and display RSSI value (#4)

Set Fading Margin Improvement as recommended in datasheet

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)

Display received temperature on a nice IPS TFT

Improve transmission reliability and range

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

Add I2C, some cleanup

Reduce program size

Functions to transmit and receive an array of bytes

Small optimization

Print whole packet, transmit string, cleanup

Simple Tx-Rx working