aliases for printer and new power control relay. moonraker power control for printer enabled and accessible via mainsail. power control python script for power control via http in moonraker

6 files changed, 159 insertions, 21 deletions

diff --git a/hosts/gnuslashprinter/configuration.nix b/hosts/gnuslashprinter/configuration.nix
index 6af701a..9e1f734 100644
--- a/hosts/gnuslashprinter/configuration.nix
+++ b/hosts/gnuslashprinter/configuration.nix
@@ -1,5 +1,8 @@
 {
-	imports = [ ./klipper.nix ];
+	imports = [
+		./flask-relay-ctl.nix
+		./klipper.nix
+	];
 
 	boot._loader.enable = true;
 
@@ -16,5 +19,11 @@
 	# Enable user timmy
 	_users.timmy.enable = true;
 
+	# Name devices
+	services.udev.extraRules = ''
+		SUBSYSTEM=="tty", KERNELS=="3-9", SYMLINK+="gsp-power"
+		SUBSYSTEM=="tty", KERNELS=="3-10", SYMLINK+="gsp-control"
+	'';
+
 	system.stateVersion = "25.11";
 }
diff --git a/hosts/gnuslashprinter/flask-relay-ctl.nix b/hosts/gnuslashprinter/flask-relay-ctl.nix
new file mode 100644
index 0000000..27507b6
--- /dev/null
+++ b/hosts/gnuslashprinter/flask-relay-ctl.nix
@@ -0,0 +1,37 @@
+{ pkgs, ... }: let
+	flaskrelayctl = pkgs.python3Packages.buildPythonApplication {
+		pname = "flaskrelayctl";
+		version = "1.0";
+		src = ./resources/flaskrelayctl;
+		pyproject = true;
+		build-system = with pkgs.python3Packages; [ setuptools ];
+		dependencies = with pkgs.python3Packages; [
+			flask
+			pyserial
+		];
+	};
+in {
+	users.users.relay-api = {
+		isSystemUser = true;
+		group = "relay-api";
+		extraGroups = [ "dialout" ];
+	};
+	users.groups.relay-api = {};
+
+	systemd.services.relay-api = let
+		RELAYCTL_DEV = "/dev/gsp-power";
+	in {
+		description = "USB Relay Flask API";
+		wantedBy = [ "multi-user.target" ];
+		after = [ "network.target" ];
+		serviceConfig = {
+			User = "relay-api";
+			Group = "relay-api";
+			ExecStart = "${flaskrelayctl}/bin/flaskrelayctl";
+			Restart = "always";
+			DeviceAllow = [ "${RELAYCTL_DEV} rw" ];
+		};
+	};
+
+	environment.systemPackages = [ flaskrelayctl ];
+}
diff --git a/hosts/gnuslashprinter/klipper.nix b/hosts/gnuslashprinter/klipper.nix
index a19261c..331a0c7 100644
--- a/hosts/gnuslashprinter/klipper.nix
+++ b/hosts/gnuslashprinter/klipper.nix
@@ -6,7 +6,7 @@
 			mcu = {
 				enable = true;
 				# Serial port connected to the microcontroller
-				serial = "/dev/serial/by-id/usb-1a86_USB_Serial-if00-port0";
+				serial = "/dev/gsp-control";
 				# Klipper flash must be enabled in order to build mcu firmware
 				# The resulting `klipper-flash-mcu` command will show the location of the firmware bin in the nix store
 				enableKlipperFlash = true;
@@ -22,29 +22,31 @@
 	#configDir = "/var/lib/moonraker/config";  # Accessible by moonraker  # TODO
 
 	# Moonraker web-api
+	security.polkit.enable = true;  # required for services.moonraker.allowSystemControl
 	services.moonraker = {
 		user = "root";
 		enable = true;
 		address = "0.0.0.0";
+		allowSystemControl = true;
 		settings = {
-			#authorization = {
-			#	force_logins = true;
-			#	cors_domains = [
-			#		"*.local"
-			#		"*.lan"
-			#		"*://app.fluidd.xyz"
-			#		"*://my.mainsail.xyz"
-			#	];
-			#	trusted_clients = [
-			#		"10.0.0.0/8"
-			#		"127.0.0.0/8"
-			#		"169.254.0.0/16"
-			#		"172.16.0.0/12"
-			#		"192.168.0.0/16"
-			#		"FE80::/10"
-			#		"::1/128"
-			#	];
-			#};
+			authorization = {
+				force_logins = true;
+				cors_domains = [
+					"*.local"
+					"*.lan"
+					"*://app.fluidd.xyz"
+					"*://my.mainsail.xyz"
+				];
+				trusted_clients = [
+					"10.0.0.0/8"
+					"127.0.0.0/8"
+					"169.254.0.0/16"
+					"172.16.0.0/12"
+					"192.168.0.0/16"
+					"FE80::/10"
+					"::1/128"
+				];
+			};
 			#file_manager.check_klipper_config_path = false;  # Disable warning when klipper config is not accessible by moonraker
 			# mainsail.cfg
 			#"update_manager mainsail-config" = {
@@ -54,6 +56,31 @@
 			#	origin = "https://github.com/mainsail-crew/mainsail-config.git";
 			#	managed_services = "klipper";
 			#};
+
+			"power printer" = let
+				relayApiHost = "http://localhost:5050";
+			in {
+				type = "http";
+				on_url = "${relayApiHost}/on";
+				off_url = "${relayApiHost}/off";
+				status_url = "${relayApiHost}/status";
+				response_template = ''
+
+					# The module will perform the "GET" request using the appropriate url.
+					# We use the `last_response` method to fetch the result and decode the
+					# json response.
+					{% set resp = http_request.last_response().json() %}
+					# The expression below will render "on" or "off".
+					{resp["state"].lower()}
+				'';
+				off_when_shutdown = true;
+				on_when_job_queued = true;
+				locked_while_printing = true;
+				restart_klipper_when_powered = true;
+				restart_delay = "1";
+				bound_services = "klipper";
+				initial_state = "off";
+			};
 		};
 	};
 
@@ -67,6 +94,7 @@
 	networking.firewall.allowedTCPPorts = [ 80 ];  # Port for mainsail via nginx
 
 	# Webcam support in mainsail
+	# TODO hook to restart ustreamer when webcam is connected
 	services.ustreamer.enable = true;
 	services.mainsail.nginx.locations."/webcam/".proxyPass = "http://localhost:8080/stream";  # Default location for ustreamer stream
 }
diff --git a/hosts/gnuslashprinter/resources/flaskrelayctl/pyproject.toml b/hosts/gnuslashprinter/resources/flaskrelayctl/pyproject.toml
new file mode 100644
index 0000000..b151b74
--- /dev/null
+++ b/hosts/gnuslashprinter/resources/flaskrelayctl/pyproject.toml
@@ -0,0 +1,10 @@
+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "flaskrelayctl"
+version = "1.0"
+
+[project.scripts]
+flaskrelayctl = "server:main"
diff --git a/hosts/gnuslashprinter/resources/flaskrelayctl/server/__init__.py b/hosts/gnuslashprinter/resources/flaskrelayctl/server/__init__.py
new file mode 100644
index 0000000..f2c0bc3
--- /dev/null
+++ b/hosts/gnuslashprinter/resources/flaskrelayctl/server/__init__.py
@@ -0,0 +1,54 @@
+from flask import Flask, jsonify
+import serial
+import os
+
+app = Flask(__name__)
+
+RELAY_DEV  = os.environ.get("RELAYCTL_DEV", "/dev/ttyUSB0")
+RELAY_HOST = os.environ.get("RELAYCTL_HOST", "127.0.0.1")
+RELAY_PORT = os.environ.get("RELAYCTL_PORT", "5050")
+RELAY_BAUD = 9600
+RELAY_ID = 1  # NOTE: multi relay boards are not supported (only relay id 1)
+
+def get_cmd(state: bool):
+    """
+    LCUS relay 4-byte control command syntax is as follows:
+    start: always 0xA0
+    relay: id of relay (counts from 1)
+    state: coil energized 0 or 1
+    checksum: sum of previous 3 bytes
+    """
+    start = 0xA0
+    relay = RELAY_ID
+    state = int(state)
+    checksum = start + relay + state
+    return bytes((start, relay, state, checksum))
+
+def get_serial():
+    return serial.Serial(RELAY_DEV, RELAY_BAUD, timeout=1)
+
+@app.route("/on", methods=["GET", "POST"])
+def on():
+    with get_serial() as ser:
+        ser.write(get_cmd(True))
+        return jsonify({"state": "ON"})
+
+@app.route("/off", methods=["GET", "POST"])
+def off():
+    with get_serial() as ser:
+        ser.write(get_cmd(False))
+        return jsonify({"state": "OFF"})
+
+@app.route("/status", methods=["GET"])
+def status():
+    with get_serial() as ser:
+        ser.write(bytes((0xFF,)))  # write 0xFF to get status
+        r = ser.readline()
+        state = r.decode("utf-8").removeprefix("CH1: ").strip()
+        return jsonify({"state": state})
+
+def main():
+    app.run(host=RELAY_HOST, port=int(RELAY_PORT))
+
+if __name__ == "__main__":
+    main()
diff --git a/hosts/gnuslashprinter/resources/klipper/printer.cfg b/hosts/gnuslashprinter/resources/klipper/printer.cfg
index 1e39048..4baba56 100644
--- a/hosts/gnuslashprinter/resources/klipper/printer.cfg
+++ b/hosts/gnuslashprinter/resources/klipper/printer.cfg
@@ -90,7 +90,7 @@ max_temp: 130
 pin: PA0
 
 [mcu]
-serial: /dev/serial/by-id/usb-1a86_USB_Serial-if00-port0
+serial: /dev/gsp-control
 restart_method: command
 
 [printer]