4 layers23.7 × 34.2 mm
SmartWatch V5
Bellafaire/ESP32-Smart-Watch
An open source smartwatch based on the ESP32 compatible with the Arduino IDE.
59 parts258MIT
4 layers46.8 × 34.8 mm
SmartWatch V4
Bellafaire/ESP32-Smart-Watch258An open source smartwatch based on the ESP32 compatible with the Arduino IDE.
- Size
- 46.8 × 34.8 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 74
- Nets
- 58
- Pads
- 292
- Tracks, vias
- 790, 192
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 24 Feb 2020
- Updated
- 29 Oct 2023
Overview
SmartWatch V4 is an open-source printed circuit board by Bellafaire, from the Bellafaire/ESP32-Smart-Watch repository on GitHub, published under the MIT licence. It is a 4-layer board of 46.8 × 34.8 mm with 74 parts on 58 nets, routed with 790 tracks and 192 vias.
It is built around the ESP32-WROOM-32, FT231XQ-R and TSC2003IPWRQ1, with the LP5912-3.3DRVT, MMBT3904 and 10118192-0001LF among its other parts. Its parts include 23 resistors, 23 connectors, 11 capacitors, 9 ICs and 4 transistors. It belongs with the wearables boards and the ESP32 boards of this library.
Main components
9
ESP32-WROOM-32
SMD,18x25.5mm-40℃~+85℃ -98dBm 2.4GHz 2.7V~3.6V 20dBm Bluetooth4.2 ESP32-DOWDQ6 UART、SDIO、SPI、I2C、GPIO、PWM、ADC、DAC SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
FT231XQ-R
QFN-20-EP(4x4)-40℃~+85℃ 125uA 3.3V~5V 8mA USB 2.0 USB to UART QFN-20-EP(4x4) USB Converters ROHSFTDIUSB Converters
TSC2003IPWRQ1
TSSOP-16-40℃~+85℃ 12 2.5V~5.25V 4-Wire Resistive Built-in temperature sensor I2C TSSOP-16 Touch Screen Controllers ROHSTexas InstrumentsTouch Screen Controllers
LP5912-3.3DRVT
WSON-6-EP(2x2)-40℃~+125℃@(Tj) 1 12uVrms 3.3V 30uA 500mA 6.5V 75dB@(1kHz) 95mV@(500mA) Fixed PG Pin、Over Current Protection、Over Temperature Protection、Soft Start、Enable、Short Circuit Protection Positive WSON-6-EP(2x2) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
MMBT3904
SOT-23-55℃~+150℃ 1 NPN 100 100nA 200mA 200mW 300MHz 300mV 40V 6V NPN SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
10118192-0001LF
SMD-30℃~+80℃ 1 1.8A 100V 5P Black Female Micro-B Surface Mount, Right Angle USB 2.0 SMD USB Connectors ROHSAmphenolUSB Connectors2N7002K
SOT-23-55℃~+150℃ 1 N-channel 1.2Ω@10V、1.4Ω@5V 1.6V 2.9pF 300pC@4.5V 30pF 380mA 4.2pF 540mW 60V SOT-23 MOSFETs ROHSDiodes IncorporatedMOSFETsFDN340P
SOT-23-55℃~+150℃ 1 P-Channel 1.5V 121pF 20V 2A 500mW 56pF 7.2nC@4.5V 70mΩ@4.5V 779pF P-Channel SOT-23 MOSFETs ROHSonsemiMOSFETsFSV340FP
SOD-123HE1 Independent 160uA@40V 3A 40V 520mV@3A SOD-123HE Schottky Diodes ROHSonsemiSchottky Diodes
README
README.mdESP32 Smartwatch
This project is a fully open source smartwatch based around the ESP32, the project is ongoing for updates see the hackaday.io page for this project (https://hackaday.io/project/168227-custom-smartwatch).
The goal of this project is to create a smartwatch that is easy to reprogram and use as an IOT controller or just as a DIY fashion statement.
Serial communication and charging are handled on-board through a single micro-usb connector without any external dock.
The watch is built around the ESP32 WROOM module and is programable using the espressif or Arduino IDE.
Using the ESP32 allows for the user to develop their software while leveraging the open-source libraries and examples that are available online for quick development.
Companion App
The companion android app that allows the smartwatch to control media and obtain phone notifications has been split to a seperate repo and can be found here along with an example sketch for bluetooth interfacing using the ESP32. The app can be downloaded from the releases tab of the provided repo, the V1 watch firmware works only with app releases up to 1.2.0. For firmware versions 2 and 3 releases after 2.0.0 must be used, releases after this version use a different communication structure that has proved to be more reliable.
Firmware Versions
There are 3 versions of the firmware available for this project. Only V3 is in active development. The V1 firmware utilizes deep sleep along with the V1 android companion app, this firmware works well enough and offers the greatest power savings over any of the other options. V2 is a bit more animated, boasting some additional applications along with the switch to light sleep which enables faster wakeup from tap or by performing a wrist gesture.
V3 is the current firmware, it is much more stable and expandable. The current V3 firmware supports:
- App icons on home screen, tap to view the tagline of the notification
- Spotify control through tapping the spotify app icon
- built in calculator
- Improved UI and tools to aid feature expansion.
The case is 3D printed and designed in FreeCAD, the design files are available in this repo.
Dependencies
If you're working with the V3 Firmware, then you will need the following dependencies, you can get these through the Arduino IDE library manager:
- Adafruit GFX Version 1.11.9 By Adafruit
- Adafruit ST7735 and ST7789 Library Version 1.10.3 By Adafruit
- base64 Version 1.30 by Densaugeo
Other versions of the above dependencies will most likely work but have not been tested on this hardware.
Hardware Versions
The current hardware version for the watch is V5 which provides a more slim design while maintaining all the features of V4.
Video Updates about the project
Parts
74| Qty | Value | Footprint | References |
|---|---|---|---|
| 21 | TestPad | CustomFootprints:TESTPAD | J3, J4, J10, J11, J12, J13, J14, J15, J16, J17, J18, J19, J20, J21, J22, J23 +5 |
| 11 | 10k | Resistor_SMD:R_0603_1608Metric | R6, R9, R10, R13, R14, R15, R16, R17, R18, R19, R22 |
| 6 | 10uF | Capacitor_SMD:C_0603_1608Metric | C1, C4, C5, C6, C7, C10 |
| 5 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C2, C3, C8, C9, C11 |
| 4 | 100k | Resistor_SMD:R_0603_1608Metric | R1, R7, R8, R21 |
| 3 | 0 | Resistor_SMD:R_0603_1608Metric | R5, R11, R12 |
| 2 | 0 (NC) | Resistor_SMD:R_0603_1608Metric | R4, R20 |
| 2 | 27 | Resistor_SMD:R_0603_1608Metric | R2, R3 |
| 2 | EVQ-P7J01P | CustomFootprints:SW_EVQ-P7J01P | SW1, SW2 |
| 2 | LP5912-3.3DRVT | Package_SON:WSON-6-1EP_2x2mm_P0.65mm_EP1x1.6mm_ThermalVias | U3, U4 |
| 2 | MMBT3904 | Package_TO_SOT_SMD:SOT-23 | Q2, Q3 |
| 1 | CustomFootprints:BATTERY | J2 | |
| 1 | 10118192-0001LF | CustomFootprints:AMPHENOL_10118192-0001LF | J1 |
| 1 | 10m | Resistor_SMD:R_0805_2012Metric | R23 |
| 1 | 2N7002K | Package_TO_SOT_SMD:SOT-23 | Q4 |
| 1 | ADXL337 | CustomFootprints:ADXL337BCPZ-RL | U8 |
| 1 | ESP32-WROOM-32 | RF_Module:ESP32-WROOM-32 | U6 |
| 1 | FDN340P | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | FSV340FP | Diode_SMD:D_SOD-123 | D1 |
| 1 | FT231XQ | Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm | U2 |
| 1 | MAX17260 | CustomFootprints:TDFN16-EP | U1 |
| 1 | MAX17260_WLP | CustomFootprints:Maxim_WLP-9_1.595x1.415_Layout3x3_P0.4mm_Ball0.27mm_Pad0.25mm_NSMD | U7 |
| 1 | MCP73832-2-OT | Package_TO_SOT_SMD:SOT-23-5 | U5 |
| 1 | TSC2003IPWR | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U10 |
| 1 | ZJY117 | CustomFootprints:ZJY117 | A1 |
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Questions
How big is the SmartWatch V4 PCB?
It measures 46.8 × 34.8 mm and has 4 copper layers, 1.6 mm thick.
What parts does the SmartWatch V4 use?
74 parts, built around the ESP32-WROOM-32, FT231XQ-R, TSC2003IPWRQ1 and LP5912-3.3DRVT. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the SmartWatch V4 KiCad files?
From the Bellafaire/ESP32-Smart-Watch repository on GitHub, at the commit this page was made from: the board is SmartWatch V4/SmartWatch V4.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the SmartWatch V4 design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).