AJMRTC 2PCS JDY-33 Dual-Mode Bluetooth Module, Bluetooth 3.0 SPP + BLE4.2 SPP-C Serial Transparent Transmission Module, Slave Module Compatible with HC-05 HC-06 for Arduino ESP32 STM32

AJMRTC pack includes two JDY-33 dual-mode Bluetooth slave modules, widely used for wireless serial data transmission in embedded electronics. It integrates Bluetooth 3.0 SPP and BLE4.2, so it can connect to Android and Windows via classic SPP, and link iOS devices through BLE, solving the compatibility issue that traditional SPP-only modules cannot pair with iOS.

It uses standard UART TX/RX interface and supports transparent transmission. You can configure the device name, baud rate, pairing code and other settings via AT commands. The built-in PCB antenna saves space and delivers reliable signal with 6dB transmit power and -96dBm receiving sensitivity. It features ultra-low power consumption: working current is about 6.5mA, and deep sleep mode keeps power drain under 10uA for smart sensors and portable equipment.

The module is pin compatible with HC-05 and HC-06, making it a drop-in upgrade for existing Bluetooth serial projects. It has a status indicator pin to show connection state. It works perfectly with Arduino, ESP32, STM32 and other MCUs. Common applications include smart home control, Bluetooth printers, POS terminals, wireless sensor data logging and DIY remote control projects.

Specifications

1. Brand: AJMRTC
2. Quantity: 2PCS
3. Model: JDY-33
4. Bluetooth Version: BT3.0 SPP + BLE4.2
5. Working Frequency: 2.4GHz GFSK
6. Interface: UART Serial
7. Working Voltage: 1.8V3.6V (3.3V recommended)
8. Max Transmission Distance: 30M
9. Transmit Power: 6dBm
10. Working Current: ~6.5mA
11. Deep Sleep Current: <10uA
12. Mode: Slave Only
13. Configuration: AT Command Support
14. Compatibility: HC-05 / HC-06 Pin Compatible
15. Supported OS: Android, iOS, Windows, Linux
16. Application: Smart Home, Bluetooth Printer, Wireless Sensor, Serial Data Transmission, Electronic DIY