FM Transceivers (en)

Why this

  With these strategies, it is now much easier to develop device drivers. Therefore, I wrote Python drivers for several FM transceiver modules (Si4713, RDA5820N, KT0803L).  Repository is here.

Transceiver modules 

 Si4713 

• A transmitter which can also measure noise(signal) level of a particular frequency.
• Can send RDS message.
• Popular, resource (documents and sample code are well available).

KT0803L

• Transmitter mode only.
• Noisy.
• Cheap and well available.

RDA5820N

• Can switch between transmitter / receiver / audio-amplifier / ADC modes.
• Can send RDS message.
• PLL locks very slowly.
• Rare, documents and resources are rare.
• Website is not reachable.

How to use

• Usage and test methods are here and here。
• USB-I2C converter is required if you want to control transceivers with PC, options are:
• Using FT232H with Bridges package as USB-I2C converter。
• Using FX2LP with this firmware, cheaper and faster. Also, FX2LP package is required.
• There are xxxxx_proxy.py modules with smaller size to be used on ESP32.

Test Results

Si4713

Basic functional test

with FX2LP USB-I2C converter and Jupyter notebook

Basic functional test

with ESP32 and MicroPython Remote Kernel + Jupyter notebook

RDS transmission test 

RDA5820N

Basic functional test

KT0803L

to be added

Dependencies:

1. Signal Generators
2. Utilities
3. FX2LP

References