Reference
Ships today

The boards

The hardware ZephOS runs on, and exactly what differs between them.

ZephOS runs on off-the-shelf development boards you can buy today. Here is each one — the part you order, and what sets it apart.

Usable width and usable height are different numbers on every board — read the axis, not the larger number.

Waveshare

AMOLED 1.8"

ESP32-S3-Touch-AMOLED-1.8

Panel

Shape
rect
Resolutionpx
368 x 448
Physical sizemm
28.7 x 34.94
Corner radius
59 px / 4.6 mm

Safe area

Insetstop / right / bottom / left, px
52 / 18 / 34 / 18
Usable WIDTHhorizontal axis
332 px
Usable HEIGHTvertical axis
362 px

Hardware

Touch
Yes
Buttons
main: tap, double, holdaux: tap, double
Microphone
single
Speaker
Yes
IMU
Yes
Real-time clock
Yes
SD card
Yes
Haptics
No
Battery
Yes
FlashMB
16
Firmware board
zeph/zeph_v0_amoled_eval

AMOLED 1.75" round

ESP32-S3-Touch-AMOLED-1.75C

Panel

Shape
round
Resolutionpx
466 x 466
Physical sizemm
44.45 x 44.45
Corner radius
233 px / 22.2 mm

Safe area

Insetstop / right / bottom / left, px
50 / 64 / 50 / 64
Usable WIDTHhorizontal axis
338 px
Usable HEIGHTvertical axis
366 px

Hardware

Touch
Yes
Buttons
main: tap, double, holdaux: tap, double, hold
Microphone
dual
Speaker
Yes
IMU
Yes
Real-time clock
No
SD card
No
Haptics
No
Battery
Yes
FlashMB
32
Firmware board
zeph/zeph_v1_amoled_175c

AMOLED 2.06"

ESP32-S3-Touch-AMOLED-2.06

Panel

Shape
rect
Resolutionpx
410 x 502
Physical sizemm
33.09 x 41.51
Corner radius
111 px / 9.2 mm

Safe area

Insetstop / right / bottom / left, px
64 / 36 / 48 / 36
Usable WIDTHhorizontal axis
338 px
Usable HEIGHTvertical axis
390 px

Hardware

Touch
Yes
Buttons
main: tap, double, holdaux: tap, double
Microphone
dual
Speaker
Yes
IMU
Yes
Real-time clock
Yes
SD card
No
Haptics
No
Battery
Yes
FlashMB
32
Firmware board
zeph/zeph_v1_amoled_206

AMOLED 2.16"

ESP32-S3-Touch-AMOLED-2.16

Panel

Shape
rect
Resolutionpx
480 x 480
Physical sizemm
43.3 x 43.3
Corner radius
72 px / 5.8 mm

Safe area

Insetstop / right / bottom / left, px
56 / 40 / 56 / 40
Usable WIDTHhorizontal axis
400 px
Usable HEIGHTvertical axis
368 px

Hardware

Touch
Yes
Buttons
main: tap, double, holdaux: tap, double, holdpower: tap, double
Microphone
dual
Speaker
Yes
IMU
Yes
Real-time clock
Yes
SD card
Yes
Haptics
No
Battery
Yes
FlashMB
16
Firmware board
zeph/zeph_v1_amoled_216

The two halves

Device WASM and companion WASM are separate binaries with separate import sets. You compile twice; there is no universal build.

Wire contract

The device/host protocol. You do not need this to build an app.