I used to work on some low-level kernel and ASIC orienteered projects when I was younger, playing around with things like the linux kernel and seeing what changes would not crash the build. I used to have an rpi cluster but I took it all down because it was really messy and inefficient, also because most of my projects were moving to VDSs or VPSs (I used to have a raspberry pi cluster with the usual rancher, ansible, docker and kubernetes stack.).
Partly sunny in the morning and evening, possible rain in the afternoon. Temperature 25/33 °C.
Singapore, Jurong (1.352230N, 103.711342E).