im setting up a few Bluetooth relay board in a van to control everything i was going to have one pi with 5" touch screen to do everything via node red but after seeing nextion screens and a esp-32 wifi looks amazing so i could have 3 screens front dash , tail gate and workshop area
so to the question whats best raspberry pi as a server receiving mqtt from the controllers esp-32?
id like to use node red
requirements :
has to be reliable front controls must always work
want, not need , fast boot time from starting the van to being able to use the touch panels
connect to 2 Bluetooth relays boards
ok so my van has wifi but id rather not use it due to reliability and port forwarding but if i must, i must , also in future have a app to control from my phone if i do have it on wifi
so whats the best way to do this any simple ways im missing ? or can i just not have a server and have each unit connect to the 2 Bluetooth relays
thanks for your time craig