DinMeter

SKU:K134

Description

DinMeter is an embedded development board that adheres to the 1/32DIN standard, featuring a 1.14-inch ST7789 screen and a built-in rotary encoder with buttons for precise knob position recording. Additionally, it includes an RTC circuit, an onboard buzzer, and buttons for device interaction and wake-up alerts. The product is designed to support DC input ranging from 6V to 36V and includes a lithium battery interface and charging circuit to accommodate various power supply needs. The reserved PORT.A and PORT.B interfaces allow for easy expansion of I2C and GPIO devices. This product is suitable for applications such as parameter measurement and detection, smart home control, IoT projects, smart wearables, access control, industrial control, and educational maker projects.

Tutorial

Arduino IDE

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

UiFlow2

This tutorial will introduce how to control the DinMeter device through the UiFlow2 graphical programming platform.

Features

ST7789v2 screen
Stamp-S3 as the main controller
Rotary encoder
Wide voltage input
Reserved PORTA and PORTB interfaces
Lithium battery interface (rechargeable)
1/32DIN standard (45 x 22.5mm)
Development Platform
- UiFlow2
- Arduino IDE
- ESP-IDF
- PlatformIO

Includes

1 x DinMeter
1 x Adhesive tape
1 x 250mAh polymer lithium battery
1 x Silk-screened sticker
1 x DC-JACK terminal input (6-36V)
1 x Back bracket

Applications

Smart home detection and control systems
Access control systems
Industrial control
Maker and DIY projects

Specifications

Specification	Parameter
SoC	ESP32-S3FN8 @ Xtensa® 32-bit LX7 dual-core processor, clock frequency 240MHz
Flash	8MB
Wi-Fi	2.4 GHz Wi-Fi
USB	USB OTG, USB Serial/JTAG
Wide Voltage Input Range	6 ~ 36V
Display Driver	ST7789V2
Display Resolution	135 x 240
Charging Current	100mA
Grove Load Capacity	PORT.A Load Capacity: DC 5V/Max:220mA PORT.B Load Capacity: DC 5V/Max:220mA
Standby Current (Battery Powered)	DC 4.2V@38.4uA
Battery Socket Specification	MX1.25-2P
Power Supply Method	USB/DC Power Supply / Battery
Operating Temperature	0 ~ 40°C
Product Size	53.0 x 30.0 x 32.0mm
Product Weight	17.8g
Package Size	136.0 x 93.0 x 23.0mm
Gross Weight	47.0g

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.