Cheap Bluetooth module to act as HID

[sairfan1]

I'm looking for a cheap Bluetooth modules to act as HID (human interface device) with Andriod or iOS.  I want to only send keys, typing letters to focused input box.
Does anyone has experience using HC-06 or some other low price module.

[matb]

I tried following the HC-05 HID compatibility tutorials, never managed to make it work.
Then I went with Adafruit BLE module https://www.adafruit.com/product/2633 SPI or UART but they are not cheap 17$.

Now I use ESP32 it works and it is designed to, no modification of firmware and whatever just working. I used this lib https://github.com/T-vK/ESP32-BLE-Keyboard works very well. (I had to use press and release the write function didn't work quite well) For 5-7$ maybe cheaper on Chinese market

[PatrickCPE]

There are some Bluetooth enabled boards from Arduino if you want to hit the ground running. Fairly cheap little pieces of kit and they're nice if you want something easy to just make a system work. Make sure the bluetooth mode supported is the one you need for your project.

https://store-usa.arduino.cc/products/arduino-nano-33-iot