I recently purchased some 4 channel Bluetooth relay modules:
https://www.aliexpress.com/i/2251832797735668.html?gatewayAdapt=4itemAdapt
The problem is -- I can only connect with THEIR app. No other app allows me to put in a 6 digit password and pair with the device.
My question is -- how can I remove the password protection on the bluetooth pairing of the device?
What do I need to hook up to / code this board? It doesn't look like it has pins to attach an Arduino to.