Having searched the forum I haven't found something similar to my use case, so thought I would post it, and my initial thinking for feedback, suggestions.
Scenario I want to build an RF game show like system, multiple players each have a button, players get to answer in the order they pressed their buttons.
- Signals timing is important.
- Fair chance signals will clash.
- No need to transmit any data, simply signal is present or not is enough
- Ten buttons.
- Near instant setup, the system can be in different locations, do not want to have to reconfigure something like local WiFi connections on 10 for each re-location.
- Short range 20 m max.
- Low power, ideally using none unless the button is pressed.
I started off looking at various WiFi (ESP8266) and cheap 433 MHz options but that seems overkill and risks signal clashes and flat batteries. I have yet top encounter a reliable Bluetooth system.
So I am thinking, 10 low power simple transmitter circuits each on their own channel, only receiving power when the button is pressed, and matching simple receivers each triggering an Arduino pin, which will do the rest of the work. maybe adapting something like https://www.aliexpress.com/item/1005005391664330.html?spm=a2g0o.productlist.main.85.3bf3609a5fRfZQ&algo_pvid=07313693-266a-4153-ae83-337102e87731&algo_exp_id=07313693-266a-4153-ae83-337102e87731-42&pdp_npi=3%40dis%21AUD%213.18%211.91%21%21%21%21%21%4021224cdb16871844418316964d074e%2112000032866806263%21sea%21AU%21132396536&curPageLogUid=tAXFdLkWzFVb