![Amazon.com: HiLetgo HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino : Electronics Amazon.com: HiLetgo HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino : Electronics](https://m.media-amazon.com/images/I/612CH8mJu-L._AC_UF894,1000_QL80_.jpg)
Amazon.com: HiLetgo HC-05 Wireless Bluetooth RF Transceiver Master Slave Integrated Bluetooth Module 6 Pin Wireless Serial Port Communication BT Module for Arduino : Electronics
![Long Range, 1.8km, Arduino to Arduino Wireless Communication With the HC-12. : 6 Steps (with Pictures) - Instructables Long Range, 1.8km, Arduino to Arduino Wireless Communication With the HC-12. : 6 Steps (with Pictures) - Instructables](https://content.instructables.com/FTH/EDOP/IO0GFDGP/FTHEDOPIO0GFDGP.jpg?auto=webp&frame=1&width=320&md=f0dc7dbb98d4015ffecef7e19e859268)
Long Range, 1.8km, Arduino to Arduino Wireless Communication With the HC-12. : 6 Steps (with Pictures) - Instructables
![Amazon.com: DSD TECH HC-05 Bluetooth Serial Pass-through Module Wireless Serial Communication with Button for Arduino : Electronics Amazon.com: DSD TECH HC-05 Bluetooth Serial Pass-through Module Wireless Serial Communication with Button for Arduino : Electronics](https://m.media-amazon.com/images/I/41MU7bNMO5L._SR600%2C315_PIWhiteStrip%2CBottomLeft%2C0%2C35_PIStarRatingFOURANDHALF%2CBottomLeft%2C360%2C-6_SR600%2C315_ZA729%2C445%2C290%2C400%2C400%2CAmazonEmberBold%2C12%2C4%2C0%2C0%2C5_SCLZZZZZZZ_FMpng_BG255%2C255%2C255.jpg)
Amazon.com: DSD TECH HC-05 Bluetooth Serial Pass-through Module Wireless Serial Communication with Button for Arduino : Electronics
![Hc-12 433mhz Si4463/si4438 Wireless Serial Port Module 1000m Replace Bluetooth With Antenna - Integrated Circuits - AliExpress Hc-12 433mhz Si4463/si4438 Wireless Serial Port Module 1000m Replace Bluetooth With Antenna - Integrated Circuits - AliExpress](https://ae01.alicdn.com/kf/H1372e3641b1a454894672f710b5de5ceY.jpg)