This section provides technical specifications and hardware reference material for building, modifying, or understanding the RADR wireless remote.
Device Overview Specification Value MCU ESP32-S3 with PSRAM Firmware Version 1.0.24 Display 320 x 240 pixels, full-color TFT LCD Connectivity Bluetooth Low Energy (BLE) BLE Device Name OSSM-REMOTE Transmit Power 9 dBm Charging USB-C Battery Gauge MAX17048 (fuel gauge IC)
Physical Specifications Parameter Value Dimensions Approximately 85 x 55 x 30 mm Weight ~80g (with battery) Battery Lithium Polymer (LiPo) Runtime 4+ hours typical use
Technical Reference Hardware Components Main PCB The RADR main board features:
ESP32-S3 microcontroller with WiFi and Bluetooth320x240 TFT LCD display with backlight control3x WS2812B RGB LEDs for status indicationPiezoelectric buzzer for audio feedbackVibration motor for haptic feedbackMAX17048 fuel gauge for accurate battery monitoringUSB-C for charging and initial programmingQWIIC connector for expansion
Controls Control Type GPIO Pins Left Encoder Rotary encoder with push GPIO 10, 11 Right Encoder Rotary encoder with push GPIO 42, 41 Left Shoulder Button Momentary GPIO 48 Right Shoulder Button Momentary GPIO 1 Under-Screen Left Momentary GPIO 38 Under-Screen Center Momentary GPIO 39 Under-Screen Right Momentary GPIO 40
Pin assignments shown are for RADR v2.x boards (with PSRAM). Earlier v1.x boards use different GPIO pins for the left encoder (GPIO 35, 36) and LEDs (GPIO 37). The firmware automatically detects and uses the correct pins for your board.
Display Parameter Value Resolution 320 x 240 pixels Type TFT LCD Status Bar Height 30 pixels Color Depth 16-bit (RGB565)
LEDs Parameter Value LED Type WS2812B RGB LED Count 3 Control Pin GPIO 12 Positions Left encoder, Middle, Right encoder
Audio/Haptic Component Pin Buzzer GPIO 2 Vibration Motor GPIO 47
Source Files All hardware design files are available on GitHub:
Bluetooth Specifications Scan Parameters Parameter Value Scan Interval 100ms Scan Window 100ms Scan Type Active Scan Duration 5000ms (5 seconds)
Connection Parameters Parameter Value Min Interval 12 (15ms) Max Interval 12 (15ms) Latency 0 Supervision Timeout 150 (1500ms) Connect Timeout 5000ms
Supported Device UUIDs Research And Desire Device Service UUID OSSM 522B443A-4F53-534D-0001-420BADBABE69 LKBX Pending DTT Pending
Lovense Device Service UUID Domi 2 57300001-0023-4BD4-BBD5-A6920E4C5653 Other Lovense Various (via Buttplug.io registry)
Control Ranges OSSM Parameters Parameter Min Max Default Speed 0% 100% 0% Depth 0% 100% 10% Sensation 0% 100% 50% Stroke 0% 100% 50%
Lovense Parameters Parameter Min Max Default Vibrate 0 16 0
Building Your Own RADR If you want to build your own RADR, you’ll need:
Electronics
RADR PCB (order from JLCPCB, PCBWay, or similar)
Components from the Bill of Materials
USB-C cable for programming
LiPo battery (check BoM for specifications)
Printed Parts
Top housing
Bottom housing
Buttons (3x)
Encoder knobs (2x)
Power switch cap
Soldering iron with fine tip
Hot air rework station (recommended)
3D printer (or order prints)
Small screwdrivers
Print Guidance Recommended print settings and multi-color options.
