(Japanese doc is here: README_ja)
aimai is an "FM transceiver" name tag based on ESP32.
- FM radio receiver
- Receiving sound
- Receiving text data with Radio Data System (RDS)
- FM radio transmitter
- Transmitting sound
- Transmitting text data with RDS
- Write your name on the board :)
HIGHLY RECOMMENDED: it should be plugged earphones into the RX module's (purple one) phone jack because the earphones line works as an antenna. If not, it might be not able to receive text data through RDS.
- Turn on the device (by toggle switch at the top of left)
- Switch to the RX mode (by toggle switch at the top of right)
- The left knob: adjust the loudness
- The right knob: adjust the RX frequency
- OLED display: it shows received text data
- Turn on the device (by toggle switch at the top of left)
- Switch to the TX mode (by toggle switch at the top of right)
- This mode transmits sound data through the TX module (the right one) line
- The left knob: RDS text input
- Turn the knob, it chooses the characters
- Click the knob, it decides a character
- It needs to input 20 characters (hint: it supports the space character)
- The right knob: adjust the TX frequency
- Click the knob, this is an escape key (i.e. leave from text input mode)
- OLED display: it shows transmitting text data
$ make bootstrap
$ make build
$ make upload
If you have something trouble, please edit the upload_port configuration on platformio.ini.
A schematic and PCB data are here: pcb
This project is optimized for Japan coverage. If you would like to use this device in countries other than Japan, you should modify the code of frequency band for Si4703 and Si4713.