HM‑17 HM‑19 BLE4.2 Bluetooth Module Master‑Slave Integrated BLE To UART Serial Port Wireless Communication Module For IoT Smart Device Project

📌 HM‑17 HM‑19 BLE Bluetooth Module

✅ Master‑slave integrated BLE to UART module. HM‑17 adopts BLE4.2 protocol while HM‑19 supports BLE5.0 protocol, both built‑in TI CC2640R2F chip. 📋 Core Features

• On‑board PCB antenna, ultra‑compact dimension: 13 * 18 * 2 mm
• Ultra‑low standby power consumption down to 0.1 uA, data transmission speed reaches 5‑7 KB/S
• Support iBeacon, Shake, Mini Programs, local & remote AT command configuration
• Adjustable gain, transmit power and broadcast interval; support custom Chinese device name
• Master mode supports password‑free connection to most slave devices on market
• Master mode includes automatic / manual working mode and self‑learning function
• Multiple scanning modes: standard scan, iBeacon scan, full broadcast packet scan
• Manual learning mode supports arbitrary UUIDs, multi‑UUIDs, service & characteristic search
• Supports Notify / Indicate switch control, multiple send‑receive attributes: WN, WR, IN, NO
• 2 MBps bandwidth for high‑speed data transmission, serial port firmware upgrade available
• Rich AT commands for flexible parameter modification

Item	Parameter
Bluetooth Protocol	HM‑17: BLE4.2; HM‑19: BLE5.0
Chipset	TI CC2640R2F
Operating Frequency	2.4 GHz ISM Band
Modulation	GFSK
Transmit Power	‑23dBm, ‑6dBm, 0dBm, 6dBm (adjustable via AT commands)
Receiver Sensitivity	≤‑84dBm @ 0.1% BER
Communication Distance	Up to 100 m in open‑air environment
Power Supply	1.9‑5.5V, 50 mA
Sleep Current	50μA‑400μA
Standby Current	6 mA
Transmission Current	10 mA
Operating Temperature	‑40℃ ~ +85℃
Dimension	13 × 18 × 2 mm
MTU	Default 253 Bytes

📝 Module Overview HM‑17 and HM‑19 BLE modules adopt TI CC2640R2F chip, provide 128KB configuration space and abundant AT commands. Users can switch master/slave role, modify baud rate, device name, pairing password and other parameters. Pin‑to‑pin compatible with HM‑06, HM‑11, HM‑13 for direct replacement without hardware modification. 🔧 Product Advantages

1. Immersion‑gold PCB with imported original components, no refurbished parts.
2. Full‑function automatic factory testing to avoid defective units.
3. Every module is frequency tuned to guarantee 2440 MHz center frequency for consistent performance.
4. Aging test procedure for long‑term stable operation.
5. More than 100 AT commands, local / remote configuration, firmware upgradable via UART.
6. Good backward compatibility, easy upgrade for existing projects.

⚠ Important Usage Notice Kind reminder: If there are version differences or images not been updated, please refer to the actual product.