Radio

Open from: main menu e → Grove 1 / r

FM radio on the left Grove port. Buy a ready-made TEA5767 or RDA5807M 4-pin module (I2C 0x60 or 0x10/0x11); both share one UI. Audio comes from the module headphone jack. Chip wiring and driver APIs: Grove.

On enter it probes left Grove (Ex_I2C). No chip → NO MOD.

Screenshots

Playing / no module / station list

Module & wiring

Buy a ready-made 4-pin board. Neither TEA5767 nor RDA5807M needs soldering. Search for TEA5767 or RDA5807M and pick a module that already brings out SDA / SCL / VCC / GND and has a 3.5 mm headphone jack. Plug it in with Dupont or a Grove jumper.

Do not buy a bare board that still needs headers, an antenna, or an audio jack soldered on.

Which connector

Use the left-side Grove (HY2.0-4P), not the rear EXT header. With the screen facing you and the keyboard at the bottom, that 4-pin rubber socket is Ex_I2C. Top → bottom:

Order (top→bottom)	Pin	Role
1	GND	Ground
2	5V	Power
3	G2	SDA
4	G1	SCL

Four pins

Pin order on the module varies by seller. Match silkscreen names to the left Grove; do not count left-to-right:

Module 4-pin	Left Grove
SDA	G2
SCL	G1
VCC / VDD	5V
GND	GND

Headphones go in the module’s 3.5 mm jack — not the Cardputer speaker, and not AirPods / Bluetooth. Many modules use the headphone cable as the antenna; use a wired 3.5 mm headset or speaker. ExI2C should then show TEA5767 at 0x60, or RDA5807M at 0x10 / 0x11.

TEA5767 has no chip volume — use the headphone volume. RDA5807M: main-screen -= (5×3 yellow grid beside signal) or Tuner → Volume.

Shortcuts

Full list: h Help (multi-page).

Key	Action
h	Help
← →	Seek previous / next station; press same again to stop
↑ ↓	Fine tune step
- =	RDA: volume · TEA: step tune
[ ]	Previous / next saved station
a	Auto scan and save
m / o	Mute / force mono
s / BtnA	Blank screen; any key or BtnA wakes
l	Station list
t	Open / close Tuner
i	RDS info (RDA only)
1–0	Jump to station slot

On the main screen, 30s idle auto-blanks (audio keeps playing). Help / list / Tuner / seek do not auto-blank.

In the list: arrows select, Enter tunes and exits, r rename, n add current freq, d / Backspace delete, c clear all and save, p pin to top.

Tuner

From the main radio screen press t to open Tuner (settings list); press t or ESC again to return. Changes apply to the chip immediately and are saved.

Key	Action
↑ ↓ / ; . etc.	Move between items
Tab / Shift+Tab	Next / previous item
Enter / Space / =	Next value
-	Previous value
t	Close Tuner
h	Tuner Help

TEA5767 items

Item	Values	Meaning
Band	Europe / Japan	Europe 87.5–108 MHz; Japan 76–91 MHz
De-emphasis	50 us / 75 us	De-emphasis: EU/JP 50µs, North America 75µs
Seek mode	Software / Hardware	Software = step seek; Hardware = chip seek
Seek stop	Low / Mid / High	Hardware seek stop threshold (higher = pickier)
Injection	High / Low	Local-oscillator injection side; flip if a station is noisy
Soft mute	On / Off	Soft mute on weak stations
High cut	On / Off	High-cut on weak stations
Noise cancel	On / Off	Stereo noise cancelling
Channel mute	Off / Left / Right	Mute left or right channel

RDA5807M items

Extra bands, step, volume, and station data vs TEA:

Item	Values	Meaning
Band	87-108 / 76-91 / 76-108 / 65-76 / 50-76	Europe / Japan / wide / East Europe / low FM
Step	100 kHz / 200 kHz / 50 kHz / 25 kHz	Tune step
De-emphasis	50 us / 75 us	Same as TEA
Seek mode	Software / Hardware	Same as TEA
Seek threshold	0–15	Hardware seek SNR threshold (default 8; higher = stricter; valid-station checked after stop)
Seek wrap	On / Off	Wrap at band edges while seeking
Volume	0–15	Chip volume
Bass boost	On / Off	Bass boost
Soft mute	On / Off	Soft mute on weak stations
Soft blend	On / Off	Blend weak stereo toward mono
Radio data	On / Off	European RDS
US radio data	On / Off	North-American RBDS
Auto freq	On / Off	Auto frequency control; leave On

Main screen i shows station data (name / radio text, …); RDA only.

Usage

1. Plug the ready-made 4-pin module into the left Grove (G2=SDA, G1=SCL); headphones into the module jack.
2. Open with r. Header shows the chip name; dial green = saved station, cyan = active.
3. Seek with arrows, or a for auto scan; l to manage stations.
4. Press t for Tuner (band / seek mode — tables above).
5. Leaving the App puts the chip in standby.