Added Raspi 4 Conf

2025-11-26 15:17:08 +01:00
parent bcdb501d4d
commit c66dd11217
3 changed files with 273 additions and 0 deletions
--- a/hosts/rpi4/fan-controll.nix
+++ b/hosts/rpi4/fan-controll.nix
@@ -0,0 +1,50 @@
+{ pkgs, ... }:
+{
+  environment.systemPackages = with pkgs; [
+    (python3.withPackages (ps: [ ps.smbus2 ]))
+  ];
+
+
+  # Fan control service
+  systemd.services.argon-fan = {
+    description = "Argon40 Fan Control via I2C";
+    after = [ "multi-user.target" ];
+    wantedBy = [ "multi-user.target" ];
+    
+    serviceConfig = {
+      Type = "simple";
+      Restart = "always";
+      ExecStart = pkgs.writeScript "argon-fan.py" ''
+        #!${pkgs.python3.withPackages (ps: [ ps.smbus2 ])}/bin/python3
+        import smbus2
+        import time
+        import subprocess
+        
+        bus = smbus2.SMBus(1)
+        
+        while True:
+            try:
+                # Get temperature
+                temp_output = subprocess.check_output(['${pkgs.libraspberrypi}/bin/vcgencmd', 'measure_temp']).decode()
+                temp = float(temp_output.replace("temp=","").replace("'C\n",""))
+                
+                # Set fan speed based on temperature (0-100)
+                if temp < 55:
+                    speed = 0
+                elif temp < 60:
+                    speed = 25
+                elif temp < 65:
+                    speed = 50
+                else:
+                    speed = 100
+                
+                bus.write_byte(0x1a, speed)
+                print(f"Temp: {temp}°C, Fan: {speed}%")
+            except Exception as e:
+                print(f"Error: {e}")
+            
+            time.sleep(30)
+      '';
+    };
+  };
+}