i have a working up down counter, press a button, the number counts up, press another button the counter counts down.
easy peasy, but its wired in with 2 x 15ft cables, and id like to make it wireless, and add multiple ups and downs.
ive seen the simple bluetooth modules, the JY-MCU, or rs232 ttl module, and whilst i have 1 of these for each of the senders, and 1 for the receiver are there any known issues with using 3 bluetooth modules on one piece of kit?
i understand that i will have to have an arduino for each button, and then one in the counter (of which to keep small ill use a attiny45 or the like)
thanks for the input!