DinMeter v1.1

SKU:K134-V11

Description

DinMeter v1.1 is an iterative upgrade of the DinMeter product, with the core enhancement being the main control module upgraded from Stamp-S3 to Stamp-S3A. DinMeter v1.1 adopts the 1/32 DIN standard digital meter cutout size, allowing direct installation into reserved mounting openings of mainstream equipment such as industrial control cabinets and PLC control boxes, without the need for custom brackets or panel modifications. This significantly reduces integration cost and assembly time. It supports two mounting methods—double-sided adhesive and screw hole fixation—to meet installation requirements in different scenarios. The product integrates a 1.14-inch ST7789 display and a rotary encoder with button, enabling precise knob position tracking and interactive operation. An onboard RTC real-time clock, buzzer, and function buttons support scheduled reminders and wake-up functions. The power supply design is flexible, supporting a wide DC input range of 6 ~ 36V, and includes a lithium battery interface with charging circuitry to adapt to various power scenarios. In addition, the development board provides PORT.A and PORT.B expansion interfaces for easy connection of I2C and GPIO peripherals, making it suitable for various embedded instrumentation display and control input applications.

Tutorial

Arduino IDE

This tutorial introduces how to program and control the DinMeter v1.1 device using Arduino IDE.

UiFlow2

This tutorial introduces how to control the DinMeter v1.1 device using the UiFlow2 graphical programming platform.

Features

ST7789V display
Stamp-S3A as the main controller
Rotary encoder
Wide voltage input
Reserved PORT.A and PORT.B interfaces
Lithium battery interface (rechargeable)
1/32 DIN standard (45 x 22.5mm)
Two mounting methods:
- Double-sided adhesive
- Screw hole fixation
Development Platform
- UiFlow2
- Arduino IDE
- ESP-IDF
- PlatformIO

Includes

1 x DinMeter v1.1
1 x 250mAh Polymer Lithium Battery
1 x 2.54-2P Terminal
1 x Plastic Back Clip
1 x Adhesive Tape
1 x Pin Sticker

Applications

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

Specifications

Specification	Parameter
SoC	ESP32-S3FN8 @ Xtensa LX7 Dual-core, 240MHz
Flash	8MB
Wi-Fi	2.4 GHz Wi-Fi
USB	USB OTG, USB Serial/JTAG
Wide Voltage Input Range	6 ~ 36V
Display Driver	ST7789V
Display Resolution	135 x 240
Charging Current	100mA
Grove Load Capability	PORT.A Load: DC 5V@220mA PORT.B Load: DC 5V@220mA
Standby Current (Battery Power)	DC 4.2V@38.4uA
Battery Socket Specification	1.25-2P
Power Supply Methods	USB / DC Power / 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 95.0 x 24.0mm
Gross Weight	44.9g

Learn

Power On/Off

Power On: When powered only by the battery, the device can be woken up by pressing the WAKE button or via an RTC scheduled interrupt (IRQ). After the wake-up signal is triggered, the initialization program must set the HOLD (GPIO46) pin to high level (1) to maintain power supply; otherwise, the device will return to sleep.
Power Off: When there is no USB external power (battery power only), the device can be powered off using either of the following methods: (1) Press the RST button; (2) The program actively sets the HOLD (GPIO46) pin to low level (0) to cut off battery power.