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n-watch v2.0(Smart Watch)

n-watch v2.0 is an open source, hackable smart watch based on ESP32.

naidan-demberelNaidan Demberel
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I wanted to build my open source, hackable smartwatch using esp32. And it ended up being watch with a terrible power consumption. But I love it.
All models, pcb and schematic design, code were created by me.

(if someone knows how to reduce the power consumption please let me know)

Hardware

  • Microcontroller: ESP32-D0WDQ6-V3
  • Display: 240x240 ST7789 IPS 
  • Battery: 150mah LiPo
  • Temperature sensor: SHT20
  • Battery charger IC: TP4054
  • Flash IC: W25Q32JVZPIQ
  • USB to UART IC: CP2104

Features

  • Arduino based 
  • WiFi + Bluetooth 4.0
  • The case consists of 2 parts (bottom and top)
  • 2 programmable buttons
  • Shows time, date, voltage of battery, percent of battery, temperature
  • Any 20mm watchband
  • The battery life is horrible. I tried to minimize all the power consumption (3-4 hours)
  • Has own app

PCB

3D model

Test PCB

Schematic_n-watch v2.0(Smart watch)_2022-02-12.pdf

Adobe Portable Document Format - 148.69 kB - 03/26/2022 at 23:14

Preview

n-watch v2.0.apk

package-archive - 3.22 MB - 03/26/2022 at 23:14

Download

n-watch v2.0 gerber.zip

x-zip-compressed - 104.07 kB - 03/26/2022 at 23:14

Download

BOM_PCB_n-watch v2.0_2022-03-19.csv

ms-excel - 4.91 kB - 03/26/2022 at 23:14

Download

SHT20.pdf

Adobe Portable Document Format - 580.95 kB - 03/26/2022 at 17:29

Preview

View all 9 files

  • 1 × ST7789-240X240 Display
  • 2 × K2-1114SA-A4SW-06 Button
  • 1 × CP2104 USB to UART IC
  • 1 × BMA400 Accelerometer
  • 1 × ESP32-D0WDQ6-V3 MCU

View all 31 components

  • 1
    Step 1

    Order all the components and the PCB (with stencil).

  • 2
    Step 2

    Place the components on the PCB within solder paste. And use hot air gun to solder them.

  • 3
    Step 3

    Connect the PCB to your computer with a micro B usb.

View all 5 instructions

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