diff --git a/bots/modules/__init__.py b/bots/modules/__init__.py
index 9961707..ac2a985 100644
--- a/bots/modules/__init__.py
+++ b/bots/modules/__init__.py
@@ -2,5 +2,7 @@ from .overlay import OverlayBotModuleConfig
 from .channel_helper import ChannelHelperBotModuleConfig, QueuedItem
 from .echo import EchoBotModuleConfig
 from .cyberlina import CyberLinaBotModuleConfig
+from .ping import PingBotModuleConfig
 
-BOT_MODULES = [EchoBotModuleConfig, ChannelHelperBotModuleConfig, OverlayBotModuleConfig, CyberLinaBotModuleConfig]
+BOT_MODULES = [EchoBotModuleConfig, ChannelHelperBotModuleConfig, OverlayBotModuleConfig, CyberLinaBotModuleConfig,
+               PingBotModuleConfig]
diff --git a/bots/modules/ping.py b/bots/modules/ping.py
new file mode 100644
index 0000000..efc95fd
--- /dev/null
+++ b/bots/modules/ping.py
@@ -0,0 +1,87 @@
+import os
+from tempfile import TemporaryDirectory
+from time import sleep
+
+from PIL import Image
+from django.db import models
+from django import forms
+from django.forms import modelformset_factory
+from jsonfield import JSONField
+from telegram import Update
+from telegram.ext import Dispatcher, CallbackContext, MessageHandler, Filters, CommandHandler
+from telegram.utils.helpers import mention_html
+
+from bots.models import TelegramBotModuleConfig
+
+
+class PingBotCategory(models.Model):
+    chat_id = models.BigIntegerField(db_index=True)
+    cat_name = models.CharField(max_length=64, db_index=True)
+    user_ids = JSONField(default='[]')
+
+    def add_user(self, uid: int):
+        user_ids = set(self.user_ids)
+        user_ids.add(uid)
+        self.user_ids = list(user_ids)
+
+    def remove_user(self, uid: int):
+        user_ids = set(self.user_ids)
+        user_ids.add(uid)
+        self.user_ids = list(user_ids)
+
+    class Meta:
+        unique_together = 'chat_id', 'cat_name',
+
+
+class PingBotModuleConfig(TelegramBotModuleConfig):
+    no_users_text = models.TextField(default='No users found')
+    message_template = models.TextField(default='{mentions}')
+
+    MODULE_NAME = 'Ping'
+
+    @staticmethod
+    def get_category(update: Update, name: str):
+        obj, created = PingBotCategory.objects.get_or_create(chat_id=update.effective_chat.id, cat_name=name)
+        return obj
+
+    def i_am_handler(self, update: Update, ctx: CallbackContext):
+        _, category = update.effective_message.text.split()
+        cat = self.get_category(update, category)
+        cat.add_user(update.effective_user.id)
+        cat.save()
+        update.effective_message.reply_text('Done')
+
+    def i_am_not_handler(self, update: Update, ctx: CallbackContext):
+        _, category = update.effective_message.text.split()
+        cat = self.get_category(update, category)
+        cat.remove_user(update.effective_user.id)
+        cat.save()
+        update.effective_message.reply_text('Done')
+
+    def ping_handler(self, update: Update, ctx: CallbackContext):
+        _, category = update.effective_message.text.split()
+        cat = self.get_category(update, category)
+        if not cat.user_ids:
+            return update.effective_message.reply_text(self.no_users_text)
+        mentions = []
+        for uid in cat.user_ids:
+            member = ctx.bot.get_chat_member(update.effective_chat.id, uid)
+            mentions.append(mention_html(uid, member.user.full_name))
+        update.effective_message.reply_markdown(self.message_template.format(mentions=' '.join(mentions)))
+
+    def categories_handler(self, update: Update, ctx: CallbackContext):
+        categories = []
+        for category in PingBotCategory.objects.filter(chat_id=update.effective_chat.id):  # type: PingBotCategory
+            if category.user_ids:
+                categories.append('- {} ({})'.format(category.cat_name, len(category.user_ids)))
+        if not categories:
+            update.effective_message.reply_text('No categories for this chat')
+        else:
+            update.effective_message.reply_text('\n'.join(categories))
+
+    def build_dispatcher(self, dispatcher: Dispatcher):
+        dispatcher.add_handler(CommandHandler('iam', self.i_am_handler))
+        dispatcher.add_handler(CommandHandler('iamnot', self.i_am_not_handler))
+        dispatcher.add_handler(CommandHandler('ping', self.ping_handler))
+        dispatcher.add_handler(CommandHandler('categories', self.categories_handler))
+        return dispatcher