Dial

SKU:K130

Description

Dial is a versatile embedded development board equipped with a 1.28-inch circular TFT touch screen, powered by the Stamp-S3 as the main controller, and includes a built-in rotary encoder for precise knob position recording. Additionally, the board features an RFID detection module, RTC circuit, onboard buzzer, and a screen button for device interaction and wake-up alerts. In terms of power supply, the product supports a wide voltage input range of 6 ~ 36V DC and includes a lithium battery interface and charging circuit to meet various needs. Furthermore, the reserved PORT.A and PORT.B interfaces allow for easy expansion of I2C and GPIO devices. This product is suitable for smart home control, IoT projects, smart wearables, access control, industrial control, and educational maker projects.

Tutorial

Arduino IDE

Arduino IDE

This tutorial will introduce you to how to program and control the Dial device using the Arduino IDE.

UiFlow2

UiFlow2

This tutorial will introduce you to how to control the Dial device using the UiFlow2 graphical programming platform.

Features

• Circular TFT touch screen
• Stamp-S3 as the main controller
• Rotary encoder
• RFID detection module
• Wide voltage input
• Interface expansion: Reserved PORT.A and PORT.B interfaces
• Development Platform
  • UiFlow2
  • Arduino IDE
  • ESP-IDF
  • PlatformIO

Includes

• 1 x Dial
• 1 x M2 hex wrench
• 1 x 2.54-2P terminal

Applications

• Smart home control
• IoT projects
• Access control systems
• Industrial control

Specifications

Learn

Power On/Off

• Power On: When the device is powered only by the battery, press the WAKE button or wake it via an IRQ signal triggered by the RTC timer. After the wake-up signal is triggered, set the HOLD (GPIO46) pin to high (1) in the program initialization to maintain power; otherwise, the device will return to sleep.
• Power Off: When no external USB power is connected (battery power only), use either of the following methods: (1) Press the RST button; (2) Set HOLD (GPIO46) to 0 during program execution to cut off battery power.

Download Mode

With the device powered off, press and hold the G0 button on the Stamp-S3 while connecting the device to a computer via a USB Type-C data cable. Release the button after the device is powered on; the device enters download mode.

Dial Lithium Battery Expansion Interface

RFID Card

If the size of the RFID tag is smaller than the outer dimensions of the Dial, it may not be recognized or may cause communication errors. It is recommended to use an RFID card in the standard bank card size.

Schematics

• Dial Schematics PDF

1/2

PinMap

I2C Sensor (RTC8563 & WS1850S)

ENCODER

Screen Driver (GC9A01-SPI) & Touch Driver

HY2.0-4P

Structure

• Dial Structure Files

Datasheets

• BM8563
• WS1850S
• DC Power Terminal Specification
• Lithium Battery Holder

Softwares

Arduino

• Dial Arduino Quick Start
• Dial Arduino Driver Library

UiFlow2

• Dial UiFlow2 Quick Start

Easyloader

ESP-IDF

• Espressif's Board Support Packages - M5Dial
• Dial User Demo
• Dial Knob Panel Demo

Video