Alphanumeric LCD controller software for Linux (kind of LCDSmartie for Windows but no GUI, no config file, no plugins, no Windows). Written with C++26 (-std=c++2c), will need at least gcc 14 to compile.

Hardcoded to work with 4x40 character display because that's what I have and I don't plan on using anything else. Uses Matrix Orbital protocol over serial. Should work with most other display sizes by modifying src/LCDDisplay.cpp. Best of luck.

Vaguely inspired by suckless software philosophy.

The config is the source code

Same as plugins. Just write in more features scrub, learn some C++, damn

TODOs

Use string_views when possible, its faster
Extra screens support perhaps? just halt sensors monitoring thread and print another struct on display if needed, have a semaphore or sth
Maybe not even screens, keep the 1st line and change lines 2-4
Media playback screen (use mpris, get playback info with mpris)
In the LCDDisplay lib, reimplement all the features I have in picoSmartie + maybe finally add keypad support for both so I can toggle backlight (?) or change screens if I want any
Screens could be automatic tbh, like if it detects media playing it switches to media screen, if in media screen and GPU power > 80W it switches to main (hwmon) screen
Network monitoring would be sick
Suspend/resume still broken but also I don't really use it soooo...
Try to be C++26, avoid globals, wrap in namespaces, use naming conventions, use classes, avoid pure C way of doing things unless it makes more sense
consider std::string_view

LCD layout

It looks something like this

****************************************
0.4      0    ||09:30:36|         124fps
53/40/35C 4.53GB          544MB   32/40C
26W  424R      65.9W    0R   7/244W  11W
1,200V 1186MHz  3150       2/9MHz 0,112V
****************************************

(on LCDSmartie)

Ok but what does it all mean

In general left side is CPU/system stuff, right side is GPU stuff

{act core cnt} {whea} {time} {bar/1cpu%}{bar/AllCPU%}{TIME}{gpu%} {xbat} {fps}

{dieAvg}/{cache}/{iod}C {ram}GB  {vram}GB  {edge}/{junction}C

{cpuPpt}W {cpufan}R {wallPow}W {gpufan}R {gpuPpt}/{cap}W {gpuBoard}W

{cpuV}V {avgCpuFreq}MHz {gpuCoreClkCap} {gpuCoreClk}/{gpuMemClk}MHz {gpuV}V

Not all of this will be possible ofc but it's a start

Raw LCD Smartie lines below:

Text01="$dll(hwinfo,1,Average Active Core Count,1)$Fill(9)$dll(hwinfo,1,Total Errors,0)$Fill(14)$dll(tinybar2,8,$dll(hwinfo,1,Max CPU/Thread Usage,),1)$Fill(5)$dll(tinybar2,7,$dll(hwinfo,1,Total CPU Usage,),1)$Time(hh:mm:ss)$dll(tinybar2,6,$dll(hwinfo,1,GPU Utilization,),1)$dll(xbat,1,i,1)$Fill(33)$Right($dll(hwinfo,1,Framerate (Presented),0),$4%)fps"
Text02="$dll(hwinfo,1,1|CPU Die (average),0|a)/$dll(hwinfo,1,1|L3 Cache (CCD1),0)/$dll(hwinfo,1,1|CPU IOD Hotspot,0)$Chr(176)$Fill(10)$dll(format,2,$dll(hwinfo,1,1|8|4,0),0##B)B$Fill(24)$Right($dll(format,2,$dll(hwinfo,1,GPU D3D Memory Dedicated,0),0##B),$6%)B$Fill(34)$Right($dll(hwinfo,1,GPU|1|1,)/$dll(hwinfo,1,GPU|1|4,)$Chr(176),$7%)"
Text03="$dll(hwinfo,1,5|1,0)W$Fill(5)$dll(hwinfo,1,3|2,)R$Fill(14)$Right($dll(tasmopwr,1,tasmota-plug-pc.lan,)W,$6%)$Fill(21)$Right($dll(hwinfo,1,GPU|3|1,)R,$5%)$Fill(27)$Right($dll(hwinfo,1,GPU|5|9,0)/$dll(hwinfo,1,GPU|5|10,0)W,$8%)$Fill(36)$Right($dll(hwinfo,1,GPU|5|7,0)W,$4%)"
Text04="$dll(hwinfo,1,Vcore,3)V $Right($dll(hwinfo,1,Average Effective Clock,a)MHz,$7%)$Fill(16)$dll(hwinfo,1,GPU Shader Clock Frequency Limit,)$Fill(21)$Right($dll(hwinfo,1,GPU|6|2,)/$dll(hwinfo,1,GPU|6|4,)MHz,$12%)$Fill(34)$dll(hwinfo,1,GPU|2|1,3)V$CustomChar(1,16,6,9,8,8,9,6,0)"

So what's still missing

Per-core CPU load, doable but annoying
FPS counter, maybe possible?
Active core count, probably impossible but loadAvg is better?
GPU board power, probably impossible, it was estimated on windows anyway
CPU cache/iod, likely impossible, zenpower doesnt show it
GPU clock limit, probably impossible, gpu_metrics doesnt show it?

Additional notes

To read motherboard sensors on ASUS ROG STRIX B550-A GAMING, as of Linux 6.16 you need to booth with kernel parameter of acpi_enforce_resources=lax. On Fedora it can be added by appending it to /etc/kernel/cmdline.