| Price | $5 |
|---|---|
| Category | Communication Modules |
| Availability | In stock |
| Delivery | Shipped across Lebanon, or collect from the lab |
A JDY-31 Bluetooth Classic module on the familiar HC-05/HC-06 breakout - six pins, a PCB trace antenna and a small button. It gives a microcontroller a wireless serial link to an Android phone or a PC: whatever you print goes out over Bluetooth and arrives at the other end. It is slave-only, defaults to 9600 baud with pairing code 1234, and it answers a different AT command set from an HC-05, so old setup scripts need editing.
Key features
- Bluetooth 3.0 Classic SPP - wireless serial, not BLE
- Breakout runs on 3.6-5V; RX pin is 3.3V logic
- Defaults: 9600 baud, name JDY-31-SPP, PIN 1234
- Slave only - a phone or PC connects to it
- Same 6-pin wiring as an HC-06, different AT commands
- Works with Android and PCs; iPhones need a BLE module
Details
Specifications
| Model | JDY-31 |
|---|---|
| Type | Bluetooth 3.0 Classic, SPP (serial port profile) |
| Operating voltage | 3.6-5V (breakout board) |
| Logic voltage | 3.3V - divide a 5V Arduino TX down to the RX pin |
| Interface | UART (TTL serial) |
| Default baud rate | 9600 bps |
| Default name / PIN | JDY-31-SPP / 1234 |
| Role | Slave only |
| Range | ~10 m typical indoors; up to ~30 m reported in the open |
| Antenna | On-board PCB trace |
