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6-axis IMU
QMI8658 accelerometer and gyroscope for motion-aware wearable features.
TechRexOS Hardware
ESP32-S3R8 smartwatch hardware with a 2.06-inch AMOLED display.
TechRexOS Watch is built on an ESP32-S3R8 wearable platform combining a dual-core 240 MHz processor, high-resolution AMOLED touch display, Wi-Fi, Bluetooth LE, motion sensing, RTC, audio hardware, microSD support and an integrated battery-powered watch enclosure.
Core platform
Enough hardware for a rich wearable Smart Home interface.
The ESP32-S3R8 combines dual-core processing with 8 MB PSRAM and 32 MB Flash, giving TechRexOS room for a responsive AMOLED user interface, connectivity services, local interaction logic and future features.
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Dual-core Xtensa LX7Up to 240 MHz for the wearable runtime and interface.
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8 MB PSRAM + 32 MB FlashMemory headroom for firmware, UI assets and system services.
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ESP-IDF supportThe TechRexOS firmware stack is developed around ESP-IDF.
Display & interaction
AMOLED designed for a watch-sized interface.
A 2.06-inch 410 × 502 AMOLED panel with capacitive touch gives TechRexOS a sharp, high-contrast surface for Smart Home states, tiles, notifications and gestures.
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410 × 502 pixelsHigh pixel density for readable controls on a small wearable screen.
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600 cd/m² brightnessDesigned for strong visibility with 178° viewing angle.
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16.7 million colorsUseful for state colors, themes, icons and rich UI elements.
Full specification
TechRexOS Watch hardware details.
This specification describes the current ESP32-S3-Touch-AMOLED-2.06 hardware platform used as the physical foundation for TechRexOS Watch.
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MicrocontrollerESP32-S3R8, dual-core Xtensa LX7, up to 240 MHz
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Memory512 KB SRAM, 384 KB ROM, 8 MB PSRAM, 32 MB Flash
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Display2.06-inch AMOLED, 410 × 502 px, 16.7 million colors
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Display controllerCO5300 over QSPI
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TouchFT3168 capacitive touch controller over I²C
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Viewing angle178°
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Brightness600 cd/m²
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Contrast100000:1
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Motion sensingQMI8658 6-axis IMU: accelerometer + gyroscope
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RTCPCF85063 real-time clock
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Power managementAXP2101
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AudioES8311 codec + ES7210 echo suppression
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Wi-Fi2.4 GHz, IEEE 802.11 b/g/n
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BluetoothBluetooth 5 Low Energy
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USBUSB Type-C for power and communication
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ExpansionBOOT and PWR buttons, UART / I²C / USB pads
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StoragemicroSD / TF card slot
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Battery3.7 V lithium battery, MX1.25 connector
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CaseWatch-style enclosure with strap mounting
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Device dimensions50.8 × 42 × 13.6 mm
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Total length with strap250 mm
Sensors & connectivity
More than a display and Wi-Fi radio.
The board also includes motion sensing, real-time clock, audio hardware, Bluetooth LE, USB-C and removable storage support, giving TechRexOS room to grow beyond basic Smart Home control.
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RTC
PCF85063 real-time clock supported by the AXP2101 power-management architecture.
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Audio hardware
ES8311 codec plus ES7210 echo-suppression hardware for future audio and voice use cases.
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Wi-Fi 2.4 GHz
802.11 b/g/n connectivity for local MQTT Smart Home communication.
B
Bluetooth 5 LE
Low Energy Bluetooth provides another wireless path for future wearable interactions.
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microSD / TF
Expandable local storage through the integrated TF card slot.
Included hardware
What the development kit includes.
The current hardware set includes the smartwatch board, watch strap and 3.7 V lithium battery.
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ESP32-S3-Touch-AMOLED-2.06
The complete wearable development board and display assembly.
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Watch strap
Strap for the supplied watch-style enclosure.
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3.7 V battery
Lithium battery with MX1.25 connector for portable operation.
FAQ
Questions about the ESP32 smartwatch hardware.
Useful answers for people searching for ESP32-S3 smartwatch, AMOLED wearable and Smart Home watch hardware.
Which microcontroller does TechRexOS Watch use?
The current hardware platform is based on ESP32-S3R8 with a dual-core Xtensa LX7 processor running up to 240 MHz.
What display does the watch use?
A 2.06-inch AMOLED touch display with 410 × 502 pixel resolution and 16.7 million colors.
How much memory is available?
The platform provides 8 MB PSRAM and 32 MB Flash in addition to the ESP32-S3 internal memory resources.
Does it support Wi-Fi and Bluetooth?
Yes. It supports 2.4 GHz Wi-Fi 802.11 b/g/n and Bluetooth 5 Low Energy.
Does the watch include motion sensors?
Yes. The QMI8658 provides a 6-axis accelerometer and gyroscope.
Can the hardware support audio and voice features?
The board includes ES8311 audio codec hardware and ES7210 echo suppression. TechRexOS may use selected capabilities as the product evolves.
TechRexOS Watch
Purpose-built software on capable wearable hardware.
The hardware matters because it gives TechRexOS the room to become more than a remote control: a full Smart Home wearable platform with local communication, rich UI and browser-based configuration through TechRexOS Studio.