diff --git a/.gitignore b/.gitignore
index 0e5ac79..2db7150 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 .venv
-__pycache__
\ No newline at end of file
+__pycache__
+alerting/credentials.json
diff --git a/README.md b/README.md
index 94cbb2d..6bb4e40 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,18 @@
 # lego-monitoring
+
+## Prerequisites
+
+* `pacman -S libolm`
+* `pip -r requirements.txt`
+
+## Configuring
+
+* Run `alerting/login.py` once to generate credentials file
+* Invite the bot account to the room (you have to accept the invite manually)
+* Set room ID in `alerting/common.py`
+
+## Running
+
+* `prettyprint.py` -- check and print all sensors
+* `service.py` -- launch service
+* `lego-monitoring.service` is a systemd unit that starts `service.py`
diff --git a/alerting/alerts.py b/alerting/alerts.py
new file mode 100644
index 0000000..78d71fd
--- /dev/null
+++ b/alerting/alerts.py
@@ -0,0 +1,78 @@
+import json
+from dataclasses import dataclass
+from enum import Enum, StrEnum
+from typing import Optional
+
+import aiofiles
+import nio
+
+from alerting.common import CREDS_FILE, ROOM_ID
+
+
+class AlertType(StrEnum):
+    TEST = "TEST"
+    RAM = "RAM"  # TODO
+    CPU = "CPU"  # TODO
+    TEMP = "TEMP"
+    LOGIN = "LOGIN"  # TODO
+    SMART = "SMART"  # TODO
+    RAID = "RAID"  # TODO
+
+
+class Severity(Enum):
+    INFO = 1
+    WARNING = 2
+    CRITICAL = 3
+
+
+@dataclass
+class Alert:
+    alert_type: AlertType
+    message: str
+    severity: Severity
+
+
+async def get_client() -> nio.AsyncClient:
+    """
+    Returns a Matrix client.
+    It is better to call get_client once and use it for multiple send_alert calls
+    """
+    async with aiofiles.open(CREDS_FILE) as f:
+        contents = await f.read()
+    creds = json.loads(contents)
+    client = nio.AsyncClient(creds["homeserver"])
+    client.access_token = creds["access_token"]
+    client.user_id = creds["user_id"]
+    client.device_id = creds["device_id"]
+    return client
+
+
+def format_message(alert: Alert) -> str:
+    match alert.severity:
+        case Severity.INFO:
+            severity_emoji = "ℹ️"
+        case Severity.WARNING:
+            severity_emoji = "⚠️"
+        case Severity.CRITICAL:
+            severity_emoji = "🆘"
+    message = f"{severity_emoji} {alert.alert_type} Alert\n{alert.message}"
+    return message
+
+
+async def send_alert(alert: Alert, client: Optional[nio.AsyncClient] = None) -> None:
+    if client is None:
+        temp_client = True
+        client = await get_client()
+    else:
+        temp_client = False
+    message = format_message(alert)
+    await client.room_send(
+        room_id=ROOM_ID,
+        message_type="m.room.message",
+        content={
+            "msgtype": "m.text",
+            "body": message,
+        },
+    )
+    if temp_client:
+        await client.close()
diff --git a/alerting/common.py b/alerting/common.py
new file mode 100644
index 0000000..15d517b
--- /dev/null
+++ b/alerting/common.py
@@ -0,0 +1,8 @@
+import os
+from pathlib import Path
+
+CREDS_FILE = (Path(os.path.dirname(os.path.realpath(__file__))) / "credentials.json").resolve()
+HOMESERVER = "https://matrix.altau.su"
+USER_ID = "@AlertBot:altau.su"
+DEVICE_NAME = "lego"
+ROOM_ID = "!aSCaiSJfLHslrJrHiJ:altau.su"
diff --git a/alerting/login.py b/alerting/login.py
new file mode 100755
index 0000000..bd20dd2
--- /dev/null
+++ b/alerting/login.py
@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+
+import asyncio
+import getpass
+import json
+import os
+import stat
+
+from common import CREDS_FILE, DEVICE_NAME, HOMESERVER, USER_ID
+from nio import AsyncClient, LoginResponse
+
+
+async def main() -> None:
+    if os.path.exists(CREDS_FILE):
+        print(f"Creds already configured in {CREDS_FILE}")
+        raise SystemExit
+
+    client = AsyncClient(HOMESERVER, USER_ID)
+    password = getpass.getpass()
+    resp = await client.login(password, device_name=DEVICE_NAME)
+    await client.close()
+    if isinstance(resp, LoginResponse):
+        open(CREDS_FILE, "w").close()
+        os.chmod(CREDS_FILE, stat.S_IRUSR | stat.S_IWUSR)
+        with open(CREDS_FILE, "w") as f:
+            json.dump(
+                {
+                    "homeserver": HOMESERVER,
+                    "user_id": resp.user_id,
+                    "device_id": resp.device_id,
+                    "access_token": resp.access_token,
+                },
+                f,
+            )
+        print(f"Logged in as {resp.user_id}. Credentials saved to {CREDS_FILE}")
+    else:
+        raise Exception(f"Failed to log in: {resp}")
+
+
+if __name__ == "__main__":
+    asyncio.run(main())
diff --git a/lego-monitoring.service b/lego-monitoring.service
new file mode 100644
index 0000000..2ca22a2
--- /dev/null
+++ b/lego-monitoring.service
@@ -0,0 +1,10 @@
+[Unit]
+After=docker.service
+
+[Service]
+ExecStart=/opt/lego-monitoring/.venv/bin/python /opt/lego-monitoring/service.py
+Type=exec
+Restart=always
+
+[Install]
+WantedBy=multi-user.target
diff --git a/misc/checks.py b/misc/checks.py
new file mode 100644
index 0000000..f74cc40
--- /dev/null
+++ b/misc/checks.py
@@ -0,0 +1,25 @@
+from alerting import alerts
+from misc import sensors
+
+
+def temp_check() -> set[alerts.Alert]:
+    alert_list = []
+    temps = sensors.Sensors.get_temperatures()
+    for _, sensor_list in temps.items():
+        for sensor in sensor_list:
+            if sensor.critical_temp is not None and sensor.current_temp > sensor.critical_temp:
+                alert = alerts.Alert(
+                    alert_type=alerts.AlertType("TEMP"),
+                    message=f"{sensor.sensor_type} {sensor.sensor_label}: {sensor.current_temp}°C > {sensor.critical_temp}°C",
+                    severity=alerts.Severity.CRITICAL,
+                )
+            elif sensor.highest_temp is not None and sensor.current_temp > sensor.highest_temp:
+                alert = alerts.Alert(
+                    alert_type=alerts.AlertType("TEMP"),
+                    message=f"{sensor.sensor_type} {sensor.sensor_label}: {sensor.current_temp}°C > {sensor.critical_temp}°C",
+                    severity=alerts.Severity.WARNING,
+                )
+            else:
+                continue
+            alert_list.append(alert)
+    return alert_list
diff --git a/misc/sensors.py b/misc/sensors.py
new file mode 100644
index 0000000..9400dc5
--- /dev/null
+++ b/misc/sensors.py
@@ -0,0 +1,60 @@
+from dataclasses import dataclass
+
+from psutil import sensors_temperatures
+
+
+@dataclass
+class TemperatureSensor:
+    sensor_type: str
+    sensor_label: str
+    current_temp: float
+    highest_temp: float | None = None
+    critical_temp: float | None = None
+
+
+class Sensors:
+    @staticmethod
+    def get_temperatures() -> dict[str, list[TemperatureSensor]]:
+        psutil_temp_sensors = sensors_temperatures()
+
+        temp_sensors = {}
+
+        for s_type, sensors in psutil_temp_sensors.items():
+            if s_type not in temp_sensors.keys():
+                temp_sensors[s_type] = []
+            match (s_type):
+                case "nvme":
+                    for sensor in sensors:
+                        temp_sensors[s_type].append(
+                            TemperatureSensor(
+                                sensor_type=s_type,
+                                sensor_label=sensor.label,
+                                current_temp=sensor.current,
+                                highest_temp=sensor.high,
+                                critical_temp=sensor.critical,
+                            )
+                        )
+                case "amdgpu":
+                    temp_sensors[s_type].append(
+                        TemperatureSensor(
+                            sensor_type=s_type,
+                            sensor_label="Integrated GPU",
+                            current_temp=sensors[0].current,
+                        )
+                    )
+                case "k10temp":
+                    temp_sensors[s_type].append(
+                        TemperatureSensor(
+                            sensor_type=s_type,
+                            sensor_label="AMD CPU",
+                            current_temp=sensors[0].current,
+                            critical_temp=95.0,  # hardcoded because we have R9 7900X
+                        )
+                    )
+
+        return temp_sensors
+
+
+if __name__ == "__main__":
+    for i in Sensors.get_temperatures():
+        print(i)
diff --git a/main.py b/prettyprint.py
similarity index 91%
rename from main.py
rename to prettyprint.py
index c4479e4..3edc3a9 100755
--- a/main.py
+++ b/prettyprint.py
@@ -2,7 +2,7 @@
 
 from colorama import Back, Fore, Style
 
-from sensors import Sensors
+from misc.sensors import Sensors
 
 
 def pretty_print():
diff --git a/requirements.txt b/requirements.txt
index 69c8e04..ac76115 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,2 +1,3 @@
 colorama==0.4.6
 psutil==5.9.8
+matrix-nio[e2e]==0.24.0
diff --git a/sensors.py b/sensors.py
deleted file mode 100644
index ef46f9f..0000000
--- a/sensors.py
+++ /dev/null
@@ -1,54 +0,0 @@
-from dataclasses import dataclass
-from psutil import sensors_temperatures
-
-
-@dataclass
-class TemperatureSensor:
-    sensor_type:   str
-    sensor_label:  str
-    current_temp:  float
-    highest_temp:  float | None = None
-    critical_temp: float | None = None
-
-
-class Sensors:
-    @staticmethod
-    def get_temperatures() -> dict[str, list[TemperatureSensor]]:
-        psutil_temp_sensors = sensors_temperatures()
-
-        temp_sensors = {}
-
-        for s_type, sensors in psutil_temp_sensors.items():
-            if s_type not in temp_sensors.keys():
-                temp_sensors[s_type] = []
-            match(s_type):
-                case "nvme":
-                    for sensor in sensors:
-                        temp_sensors[s_type].append(TemperatureSensor(
-                            sensor_type=s_type,
-                            sensor_label=sensor.label,
-                            current_temp=sensor.current,
-                            highest_temp=sensor.high,
-                            critical_temp=sensor.critical
-                        ))
-                case "amdgpu":
-                    temp_sensors[s_type].append(TemperatureSensor(
-                        sensor_type=s_type,
-                        sensor_label="Integrated GPU",
-                        current_temp=sensors[0].current,
-                    ))
-                case "k10temp":
-                    temp_sensors[s_type].append(TemperatureSensor(
-                        sensor_type=s_type,
-                        sensor_label="AMD CPU",
-                        current_temp=sensors[0].current,
-                        critical_temp=95.0 # hardcoded because we have R9 7900X
-                    ))
-
-
-        return temp_sensors
-
-
-if __name__ == "__main__":
-    for i in Sensors.get_temperatures():
-        print(i)
diff --git a/service.py b/service.py
new file mode 100755
index 0000000..07d9fab
--- /dev/null
+++ b/service.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+import asyncio
+import logging
+import signal
+from typing import Callable, Coroutine
+
+import nio
+
+from alerting import alerts
+from misc import checks
+
+logging.basicConfig(level=logging.INFO)
+
+stopping = False
+
+
+def stop_gracefully(signum, frame):
+    global stopping
+    stopping = True
+
+
+async def checker(check: Callable | Coroutine, interval_secs: int, client: nio.AsyncClient, *args, **kwargs):
+    while True:
+        logging.info(f"Calling {check.__name__}")
+        if isinstance(check, Callable):
+            result = check(*args, **kwargs)
+            if isinstance(result, Coroutine):
+                result = await result
+        elif isinstance(check, Coroutine):
+            result = await check
+        else:
+            raise TypeError(f"check is {type(check)}, neither function nor coroutine")
+        logging.info(f"Got {len(result)} alerts")
+        for alert in result:
+            await alerts.send_alert(alert, client)
+        await asyncio.sleep(interval_secs)
+
+
+async def main():
+    signal.signal(signal.SIGTERM, stop_gracefully)
+    client = await alerts.get_client()
+    checkers = (checker(checks.temp_check, 5 * 60, client),)
+    async with asyncio.TaskGroup() as tg:
+        checker_tasks: set[asyncio.Task] = set()
+        for c in checkers:
+            task = tg.create_task(c)
+            checker_tasks.add(task)
+        while True:
+            if stopping:
+                await client.close()
+                raise SystemExit
+            else:
+                await asyncio.sleep(3)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())