What’re the differences between BM78 and RN4678?

When people talk about Bluetooth dual-mode, two modules from Microchip might come into the conversations. BM78 & RN4678. But what’re the differences between these two modules?

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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.

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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.

Name Value
Module No. BM78 RN4678 BT909
Bluetooth Version Bluetooth 4.2 dual-mode Bluetooth 4.2 dual-mode Bluetooth 4.2 dual-mode
Output Power 2 dBm 1.5 dBm 18.5 dBm
Cover Range Up to 10 meters Up to 10 meters Up to 100 meters
Data Throughput Up 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
Interface UART, etc. UART, etc. UART, I2C, PCM/I2S, etc.
Certifications CE, FCC, etc. CE, FCC, etc. CE, FCC, etc.
Unit Price Less than US$9.6 Less than US$9.6 Less than US$7.2

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Post time: Dec-27-2019