diff --git a/pccontroller/constants.ts b/pccontroller/constants.ts
new file mode 100644
index 000000000..a19a248ab
--- /dev/null
+++ b/pccontroller/constants.ts
@@ -0,0 +1,63 @@
+namespace jacdac {
+    // Service PC controller constants
+    export const SRV_PCCONTROLLER = 0x113d0987
+    export const enum PCControllerCmd {
+        /**
+         * Argument: url string (bytes). Open a URL in the default browser.
+         *
+         * ```
+         * const [url] = jdunpack<[string]>(buf, "s")
+         * ```
+         */
+        OpenUrl = 0x80,
+
+        /**
+         * Argument: name string (bytes). Start an app.
+         *
+         * ```
+         * const [name] = jdunpack<[string]>(buf, "s")
+         * ```
+         */
+        StartApp = 0x81,
+
+        /**
+         * Argument: text string (bytes). Send text to the active window.
+         *
+         * ```
+         * const [text] = jdunpack<[string]>(buf, "s")
+         * ```
+         */
+        SendText = 0x82,
+
+        /**
+         * Argument: script string (bytes). Run a script.
+         *
+         * ```
+         * const [script] = jdunpack<[string]>(buf, "s")
+         * ```
+         */
+        RunScript = 0x83,
+    }
+
+    export namespace PCControllerCmdPack {
+        /**
+         * Pack format for 'open_url' data.
+         */
+        export const OpenUrl = "s"
+
+        /**
+         * Pack format for 'start_app' data.
+         */
+        export const StartApp = "s"
+
+        /**
+         * Pack format for 'send_text' data.
+         */
+        export const SendText = "s"
+
+        /**
+         * Pack format for 'run_script' data.
+         */
+        export const RunScript = "s"
+    }
+}
diff --git a/pccontroller/pxt.g.json b/pccontroller/pxt.g.json
new file mode 100644
index 000000000..f9d423923
--- /dev/null
+++ b/pccontroller/pxt.g.json
@@ -0,0 +1,22 @@
+{
+    "name": "jacdac-pccontroller",
+    "version": "0.0.0",
+    "description": "Send various events to PC, including opening a URL, start an app, sending text, etc.",
+    "files": [
+        "constants.ts",
+        "client.g.ts"
+    ],
+    "testFiles": [
+        "test.ts"
+    ],
+    "supportedTargets": [
+        "microbit",
+        "arcade",
+        "maker",
+        "calliopemini"
+    ],
+    "dependencies": {
+        "core": "*",
+        "jacdac": "github:microsoft/pxt-jacdac"
+    }
+}
\ No newline at end of file
diff --git a/pcmonitor/constants.ts b/pcmonitor/constants.ts
new file mode 100644
index 000000000..bc0942b1d
--- /dev/null
+++ b/pcmonitor/constants.ts
@@ -0,0 +1,77 @@
+namespace jacdac {
+    // Service PC monitor constants
+    export const SRV_PCMONITOR = 0x18627b15
+    export const enum PCMonitorReg {
+        /**
+         * Read-only % uint8_t. CPU usage in percent.
+         *
+         * ```
+         * const [cpuUsage] = jdunpack<[number]>(buf, "u8")
+         * ```
+         */
+        CpuUsage = 0x190,
+
+        /**
+         * Read-only °C uint8_t. CPU temperature in Celsius.
+         *
+         * ```
+         * const [cpuTemperature] = jdunpack<[number]>(buf, "u8")
+         * ```
+         */
+        CpuTemperature = 0x191,
+
+        /**
+         * Read-only % uint8_t. RAM usage in percent.
+         *
+         * ```
+         * const [ramUsage] = jdunpack<[number]>(buf, "u8")
+         * ```
+         */
+        RamUsage = 0x192,
+
+        /**
+         * GPU info.
+         *
+         * ```
+         * const [usage, temperature] = jdunpack<[number, number]>(buf, "u8 u8")
+         * ```
+         */
+        GpuInformation = 0x193,
+
+        /**
+         * Network transmit/receive speed in Kbytes per second.
+         *
+         * ```
+         * const [tx, rx] = jdunpack<[number, number]>(buf, "u16 u16")
+         * ```
+         */
+        NetworkInformation = 0x195,
+    }
+
+    export namespace PCMonitorRegPack {
+        /**
+         * Pack format for 'cpu_usage' data.
+         */
+        export const CpuUsage = "u8"
+
+        /**
+         * Pack format for 'cpu_temperature' data.
+         */
+        export const CpuTemperature = "u8"
+
+        /**
+         * Pack format for 'ram_usage' data.
+         */
+        export const RamUsage = "u8"
+
+        /**
+         * Pack format for 'gpu_information' data.
+         */
+        export const GpuInformation = "u8 u8"
+
+        /**
+         * Pack format for 'network_information' data.
+         */
+        export const NetworkInformation = "u16 u16"
+    }
+}
diff --git a/pcmonitor/pxt.g.json b/pcmonitor/pxt.g.json
new file mode 100644
index 000000000..26abe5c4d
--- /dev/null
+++ b/pcmonitor/pxt.g.json
@@ -0,0 +1,22 @@
+{
+    "name": "jacdac-pcmonitor",
+    "version": "0.0.0",
+    "description": "Measures PC monitor.",
+    "files": [
+        "constants.ts",
+        "client.g.ts"
+    ],
+    "testFiles": [
+        "test.ts"
+    ],
+    "supportedTargets": [
+        "microbit",
+        "arcade",
+        "maker",
+        "calliopemini"
+    ],
+    "dependencies": {
+        "core": "*",
+        "jacdac": "github:microsoft/pxt-jacdac"
+    }
+}
\ No newline at end of file