Technical specifications and hardware documentation for the RADR wireless remote
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
Feedback and Indicators
LED colors, buzzer patterns, and vibration feedback details.
Battery and Power
Battery monitoring, charging, and power management.
Hardware Components
Main PCB
The RADR main board features:
- ESP32-S3 microcontroller with WiFi and Bluetooth
- 320x240 TFT LCD display with backlight control
- 3x WS2812B RGB LEDs for status indication
- Piezoelectric buzzer for audio feedback
- Vibration motor for haptic feedback
- MAX17048 fuel gauge for accurate battery monitoring
- USB-C for charging and initial programming
- QWIIC 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:
PCB Design Files
Altium Designer project files, schematics, and Gerber files.
3D Print Files
STEP and STL files for the enclosure and buttons.
Bill of Materials
Complete parts list with supplier links.
Assembly Guide
Step-by-step build instructions (see 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
Tools Required
- 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.