# 'asw' switches **URL:** \ **Category:** Uncategorized\ **Created:** [20 October 2026 00:19 UTC](https://forum.core-electronics.com.au/t/asw-switches/24509 "2026-10-20T00:19:58Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Toni135859](https://avatars.discourse-cdn.com/v4/letter/t/2bfe46/32.png) [@Toni135859](https://forum.core-electronics.com.au/u/Toni135859)\ **Post date:** [20 October 2026 00:19 UTC](https://forum.core-electronics.com.au/t/asw-switches/24509/1 "2026-10-20T00:19:58Z")
I have two picos each of which has a piicodev servo driver and an rfid module. The Picos connect to the RPi using mqtt. how do I set the asw switches on the modules to deal with the 4 devices. What happens if I add subsequent Picos and modules? ---
**Author:** ![Michael99645](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/michael99645/32/11893_2.png) [@Michael99645](https://forum.core-electronics.com.au/u/Michael99645)\ **Post date:** [20 October 2026 01:44 UTC](https://forum.core-electronics.com.au/t/asw-switches/24509/2 "2026-10-20T01:44:43Z")
In not 100% sure on what needs to know what in your project. If you have two picos, then I will assume all devices on each bus will need unique addresses, but each pico can replicate/duplicate the other. i.e. Addr/ASW Pico 1 : 00 01 10 11 Pico 2 : 00 01 10 11 At a Pico to module, as long as each device has a unique address it should be fine. so if all modules have the same base address and 2 switch’s, then 4 modules per pico. What I dont know is does the MQTT server/RPi need ALL address to be unique ? I would assume you could have a Pico01/Dev00 Pico02/Dev01 etc Key point there may be some central reason I am missing that may affect what it can support. Assuming I am correct, once you get past 4 on the modules, you can get “address changers” where it will change to a very different address allowing you to have more of the same models on each chain.