Looking for input on what type of Bluetooth device to use

Wireless & IoT Bluetooth
1

I need a standalone BT Tx and Rx for a BT headset and mic and I need it to connect to a analog audio in and out.

2

As I understand it, Bluetooth isn’t all that well suited to full duplex. If you describe your application in greater detail, we can probably say more.

3

I’ve thought about something like that for a long time and it seems that the ESP32’s that have Bluetooth are able to support HSP (“handset profile”) that is designed for full duplex mono (maybe stereo?) audio between a device and a Bluetooth headset, but HSP is disabled in the Arduino core. So you will need to do some low-level work by forking ESP-IDF or something like that. I have not tried it, it may be very difficult.

Once you have a HSP connection the audio can be piped to I2S pretty easily and then you can use a I2S ADC and DAC. The WM8960 is probably the smallest unit that Sparkfun sells for that purpose

4

Thank you for your replies. I have found this RN-52 Bluetooth Hookup Guide - SparkFun Learn but cant seem to find how to buy the unit.

5

We do still sell the bare modules, and then we also sell a newer design/device that is also meant to send/receive bluetooth data that you might want to take a look at. Feel free to peruse its associated hookup guide to see how it operates

6

"Hi, for your LTE Cat M1/NB-IoT project, consider using the ESP32, nRF52840, or HM-10 Bluetooth modules. When choosing a device, think about range, throughput, power consumption, compatibility, and cost.

Recommended Bluetooth Devices

  1. ESP32: A popular, low-cost, and versatile microcontroller with built-in Bluetooth and Wi-Fi capabilities.
  2. nRF52840: A powerful Bluetooth 5.0 module with high throughput and long-range capabilities.
  3. HM-10: A widely used Bluetooth 4.0 module with a simple serial interface.

Considerations for Choosing a Bluetooth Device

  1. Range and Throughput: Consider the required range and data transfer speed for your application.
  2. Power Consumption: Choose a device with low power consumption to ensure battery life.
  3. Compatibility: Ensure the device is compatible with your microcontroller or development board.
  4. Cost: Evaluate the cost of the device and its impact on your project’s budget.

Hope this helps
Best regards
Joel Roman