DinMeter with rotary encoder targets embedded instrumentation and control panels that need a compact, panel-mountable interface without mechanical hacks. M5stack’s DinMeter v1.1 upgrades the earlier design by moving from Stamp-S3 to Stamp-S3A, which improves stability and long-term availability while keeping the ESP32-S3 feature set intact. The board follows the 1/32 DIN cutout standard, so it drops straight into industrial cabinets and PLC panels instead of forcing custom brackets or panel rework.
The hardware focuses on interaction and deployment speed. A 1.14-inch ST7789 display handles crisp status output, while the integrated rotary encoder with push button enables precise parameter adjustment and menu navigation. This DinMeter with rotary encoder suits use cases where touchscreens add cost or complexity. The board also integrates an RTC, buzzer, and dedicated function buttons, which support alarms, timed wake-ups, and scheduled events without external modules.
DinMeter v1.1 with rotary encoder
DinMeter v1.1 Specifications:
DinMeter v1.1 uses the ESP32-S3FN8 dual-core MCU running at 240 MHz with the Stamp-S3A control module. It integrates a 1.14-inch ST7789V color display with 135 × 240 resolution and a rotary encoder with an integrated push button for precise user input. The board also includes an onboard RTC, buzzer, and dedicated wake and function keys, which support timed events, alerts, and low-power wake-up operation without external components.
The hardware supports USB, DC, or battery power and accepts a wide 6–36 V DC input suitable for industrial power rails. A lithium battery connector with onboard charging enables portable or backup operation. PORT.A and PORT.B expansion headers expose I2C and GPIO signals for external peripherals. The design follows a 1/32 DIN panel cutout of 45 × 22.5 mm and supports both adhesive mounting and screw-based fixation for flexible installation.
On the software side, DinMeter with rotary encoder stays flexible rather than forcing a single toolchain. UiFlow2 enables fast prototyping through a graphical, block-based workflow, while Arduino IDE support suits quick firmware development and hobby projects. For advanced use, ESP-IDF and PlatformIO provide low-level control, RTOS support, and CI-friendly builds. Available driver libraries, factory firmware, and quick-start guides reduce setup time and keep the focus on application development instead of board bring-up. More information available on the documents page.
The hardware supports a direct 6–36 V DC input for industrial power rails, along with USB or battery operation for portable or backup scenarios. Low standby current allows RTC-based wake-ups, and exposed 5 V, GPIO, and I2C lines on the expansion ports simplify sensor and peripheral integration. This combination makes DinMeter v1.1 a practical fit for smart home panels, access control systems, industrial indicators, and maker projects where a compact, cost-efficient physical interface matters more than a full HMI.
DinMeter with rotary encoder is available through the M5Stack’s online store and selected distributors. Pricing depends on region and bundle configuration, typically varying with battery inclusion and shipping, so the official product page remains the best source for current pricing and purchase links.
Niladri Chowdhury 
Debashis Das