Hello
no problem it is doable with 2 or 3 wires , but i need the following info
1- What is the maximum distance between Master and farthest Device ?
2- What is the Maximum number of connected Devices ?
3- Do you require any kind of communications (Sending Data) or Just On/Off Commands ?
4- How many Pieces you plan to produce so i can calculate the Cost for you per piece ?
Notes :
* I can recommend you good water proof connectors & Containers , i use these a lot
* I can Provide full supply chain of where to buy each element and with high quality and good prices
* I can Arrange whole manufacturing process for you with factories and suppliers , even the machining of plastic containers to install the connectors i can cover it for you
* I work in this field for 8 years so i know lots of trusted factories and suppliers also have very good experience with prototyping and mass production
Feel free to contact me if you have any question , Best Regards