IDM2040-21R Rotary Dial Module
Bridgetek circular rotary dial display modules feature a full-color graphic display with a capacitive touchscreen
The Bridgetek Pte Ltd. IDM2040-21R is a 2.1" circular rotary dial display module based on the FT800 embedded video engine with onboard RP2040 MCU. The module features a 480x480 full-color graphical display with a capacitive touchscreen. Users can also interact with the module via the 24-step rotary encoder dial and pushbutton, which are incorporated into the outer ring of the enclosure.
Users can develop unique user interfaces for the integrated FT800 embedded video engine using comprehensive development tools, and the onboard RP2040 microcontroller unit (MCU) can be programmed over USB. Included custom touch code allows the module to support a capacitive touch panel using the FT800. The IDM2040-21R can be interfaced with external devices via the RS485, universal asynchronous receiver-transmitter (UART), inter-integrated circuit (I²C), and audio output.
- The host MCU RP2040 is developed by Raspberry Pi with dual 32-bit Arm® Cortex®-M0+ core processors running at up to 133 MHz, 264 kB of SRAM, and 8 MB of onboard Flash memory
- 2.1" round LCD screen provides 480x480 resolution with capacitive touch support
- One I²C for connecting multiple peripherals
- One UART for serial communication
- One RS-485 for reliable long-distance communication with other devices
- One audio output for audio applications
- RGB-666 hardware interface for high-quality color display
- Rotary encoder: 24 steps with a pushbutton for input and control
- The display includes SDA, SCL, RST#, and INT# pins for the touch-panel interface, which is used for I²C communications with the CST826 touch controller (compatible with FT3267)
- IPS TFT LCD display, ST7701S controller, 300 cd/m² typical brightness, and 80° viewing angle in all directions
- Single 5 V power supply from USB-C or 6-pin JST connector
- Supports C/C++, MicroPython, and CircuitPython development
- One USB Type-C® connector provides 5 V and can be used for firmware upgrades
- Debugging and programming: BOOTSEL mode for programming via USB (drag-and-drop UF2 support)
- Home automation systems: smart thermostats and lighting control
- Audio equipment: mixing consoles and high-fidelity (hi-fi) systems
- Medical devices: portable medical monitors and patient monitoring devices
- Industrial applications: control panels and measurement instruments
- Automotive interfaces: infotainment systems and dashboards
- Consumer electronics: smart speakers, media players, and portable gaming consoles
- Test and measurement equipment: oscilloscopes and multimeters
IDM2040-21R Rotary Dial Module
| Image | Manufacturer Part Number | Description | Available Quantity | Price | View Details | |
|---|---|---|---|---|---|---|
![]() | ![]() | IDM2040-21R | Rotary Dial TFT Display | 1 - Immediate | $176.70 | View Details |



