@ganeyvim Type B

Port A units are digital/i2c and so will work as you have noticed. PortB units are analogue devices. You can try a PortBHub which will convert analogue to digital or you can try the GoPlus2 module which has analogue pins. Alternatively, on the base plate of the Core2 remove the expansion module and you will have access to the MBus connectors with analogue pins.

Hello @ganeyvim ok, I think maybe the 'vector' library is missing. Maybe you'll need to add it manually to your project? See here. Thanks Felix

@ganeyvim Works for me. Tested originally on uiFlow v1.7.8 and also flashed my M5StickCPlus to the latest v1.8.2. Both tone and beep are working quite well. Yours might be hardware related. [image: 1629134271984-screen-shot-2021-08-16-at-1.17.10-pm-resized.png]

@oscillator The CORE2 API is different from the CORE API. Different hardware.

Hi @ganeyvim , If you use UIFlow to do this, you can try this block: [image: 1628477476503-60f02e32-a5db-4554-b2a3-38f0936b42e6-image-resized.png] And arduino code can refer here: https://github.com/m5stack/M5Core2/blob/master/examples/Basics/speak/speak.ino

@ganeyvim said in "m5stacks core" Compatible units: rf433 Have you tried digikey? https://www.digikey.com/en/products/filter/rf-evaluation-and-development-kits-boards/859?s=N4IgjCBcoLQdIDGUBmBDANgZwKYBoQB7KAbRACZKIBdAX1oPNJAFsBWLAFzUQGsQ6QA

There was a change to the way the power control chip in the cores and only some are able to programmatically control the chip.

Nope...