HLK-B36 WiFi and BLE 4.2 Serial UART Module, 3.3 V
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Prices updated: 12 Oct 2026
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About this product
The HLK-B36 is a low-cost module that bridges a serial UART device to WiFi and Bluetooth LE 4.2. It supports 802.11 b/g/n with station, soft AP and mixed modes, and includes an embedded TCP/IP stack so a serial device can send data over a network. It runs from 3.0 V to 3.6 V, typically 3.3 V.
Specifications
- WiFi standard
- 802.11 b/g/n, 2.4 GHz
- Bluetooth
- BLE 4.2
- Operating voltage
- 3.0 V to 3.6 V (typ. 3.3 V)
- Main CPU frequency
- Up to 240 MHz
- RAM
- 288 KB
- Flash
- 2 MB
Frequently asked questions
Can I power it from 5 V?
Not directly. The listed operating range is 3.0 V to 3.6 V, so use a regulated 3.3 V supply. When interfacing with 5 V devices, use a level shifter on the serial lines.
What does it do with a serial device?
It acts as a serial-to-network bridge, passing UART data to WiFi or BLE, so a microcontroller can connect to a network through a simple serial link. Check the vendor documentation for the command set and configuration method.
