Those who follow me on twitter may have seen this short video;

https://www.youtube.com/watch?v=xTO2Q3jX8Z8

It is simply RRD-102 V2.0 board attached to MyHalf breakout board. The board contains RDA5807M chip and 32.768kHz crystal and passives for bypass and antenna.



MyHalf bare PCB's available through OSHPark https://oshpark.com/shared_projects/6TWMNB35

RRD-102 Boards are available from ebay, aliexpress e.g.
http://www.aliexpress.com/item/Free-...988842002.html

Datasheet can be found here http://www.seeedstudio.com/wiki/imag...sheet_v1.1.pdf

Topview of breakout board


Simply connect the SDA(=DATA) and SCL(=CLOCK) to I2C bus which is converted to 3.3V levels.
3.5mm audiojack to L/R out and GND
3.3V from phone to VDD
Antenna (piece of wire) goes to FM pin
Leave N.C. and RCK pins not connected.

For reference 3.5mm plug contacts:


Sourcecode in my github https://github.com/kimmoli/fmreceiver

This contains minimalist UI with tuning and RDS station name and radio-text display:


For the transmitter side, i did order some KT0803L chips - currently waiting them to arrive:


datasheet http://radio-z.ucoz.lv/kt_0803/KT0803L_V1.3.pdf

To get the audio from FM receiver (and to FM transmitter) to jolla audio-system is under planning. More about that when it is time for that.