​BM78 & RN4678. But What’re The Differences Between These Two Modules?

- Dec 30, 2019-

The primary difference between the BM78 and the RN4678 is how the module is configured. The BM78 is configured through a Windows GUI or directly via UART by a microcontroller. The RN4678 is configured with standard ASCII commands via UART.

Is there any other module that’s better?
Yes! BT909 is definitely a strong competitor to them. BT909 is also a Bluetooth 4.2 dual-mode module, it has much higher output power, longer cover range, more interfaces, an even lower price. We made a full comparison down blow so that you could see things more clearly.


Module No.BM78RN4678BT909
Bluetooth VersionBluetooth 4.2 dual-modeBluetooth 4.2 dual-modeBluetooth 4.2 dual-mode
Output Power2 dBm1.5 dBm18.5 dBm
Cover RangeUp to 10 metersUp to 10 metersUp to 100 meters
Data ThroughputUp to 32Kbps BR/EDR
Up to 7Kbps LE
Up to 32Kbps BR/EDR
Up to 7Kbps LE
Up to 80KBps SPP
Up to 60KBps GATT
InterfaceUART, etc.UART, etc.UART, I2C, PCM/I2S, etc.
CertificationsCE, FCC, etc.CE, FCC, etc.CE, FCC, etc.
Unit PriceLess than US$9.6Less than US$9.6Less than US$7.2

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