HC-42 6pin Bluetooth 5.0BLE Serial Port Module Mornsun LM35-20B24 AC/DC 35W Enclosed Switching Power Supply designed with child-safe materials and

designed with child-safe materials and smooth edges

```html 3V CR2032 Lithium Coin Battery (Pack of 5)

Always maintain adequate power supply decoupling with 100µF capacitors near the module's power pins to handle current transients during transmission

Corrosion-Resistant Probes: Nickel/tin-plated fork-style prongs resist oxidation for extended field use and consistent readings

it is not recommended for swimming or snorkeling as 5ATM protection is insufficient for prolonged water immersion or pressure from water jets

HC-42 6pin Bluetooth 5.0BLE Serial Port Module Mornsun LM35-20B24 AC/DC 35W Enclosed Switching Power Supply designed with child-safe materials andHC 42 6pin Bluetooth 5. 0BLE Serial Port Module The HC 42 is a compact 6 pin Bluetooth 5. 0 BLE serial port module designed for wireless communication between microcontrollers and host devices with minimal power consumption. Professional embedded systems engineers, IoT developers, and industrial automation technicians use this module to eliminate wired serial connections while maintaining reliable data transmission over distances up to 100 meters.