diff --git a/atf.inc.php b/atf.inc.php
index 4b5f1b6..879455e 100644
--- a/atf.inc.php
+++ b/atf.inc.php
@@ -2,7 +2,6 @@
 namespace taskman;
 use Amp;
 use ClickHouseDB;
-use Exception;
 
 interface IATFDevicePool
 {
@@ -259,7 +258,7 @@ class ATFSession
       $version = taskman_prop('GAME_VERSION');
       $rev_hash = taskman_prop('GAME_REVISION_HASH');
       $msg = "version $version($rev_hash) size: $apk_sizeMb Mb ($apk_sizeB B)";
-      // atf_slack_post($msg, array('channel' => _atf_slack_chan_qa()));
+      atf_slack_post($msg, array('channel' => _atf_slack_chan_qa()));
       
       $data['guid'] = $this->guid; 
       $data['time'] = time();
@@ -314,22 +313,22 @@ class ATFSession
     );
   }
 
-  // function tryShareToQAChannel($msg_slack_id, $error)
-  // {
-  //   if(!$this->share_with_qa_chan)
-  //     return;
+  function tryShareToQAChannel($msg_slack_id, $error)
+  {
+    if(!$this->share_with_qa_chan)
+      return;
 
-  //   //let's skip similar already shared errors 
-  //   if($this->_calcSharedErrorSimilarity($error) > 80)
-  //     return;
+    //let's skip similar already shared errors 
+    if($this->_calcSharedErrorSimilarity($error) > 80)
+      return;
     
-  //   $this->shared_qa_errors[] = $error;
+    $this->shared_qa_errors[] = $error;
 
-  //   //let's share an exception message to goh-qa channel
-  //   $resp = atf_slack_get_permalink($msg_slack_id);
-  //   if(isset($resp['permalink']))
-  //     atf_slack_post($resp['permalink'], array('channel' => _atf_slack_chan_qa()));
-  // }
+    //let's share an exception message to goh-qa channel
+    $resp = atf_slack_get_permalink($msg_slack_id);
+    if(isset($resp['permalink']))
+      atf_slack_post($resp['permalink'], array('channel' => _atf_slack_chan_qa()));
+  }
 
   function _calcSharedErrorSimilarity($error)
   {
@@ -368,62 +367,62 @@ class ATFPlan
     return "Testing plan '{$this->name}' devices:".sizeof($this->getDevices())."(n/a:".sizeof($this->session->ignored_devices).")";
   }
 
-  // function createSlackThread()
-  // {
-  //   for($i=0;$i<5;++$i)
-  //   {
-  //     $resp = atf_slack_post($this->getTitle());
-  //     if(isset($resp['ok']))
-  //     {
-  //       $this->slack_thread_ts = $resp['ts'];
-  //       return;
-  //     }
-  //     sleep(1);
-  //   }
-  //   throw new Exception("Could not create Slack thread");
-  // }
+  function createSlackThread()
+  {
+    for($i=0;$i<5;++$i)
+    {
+      $resp = atf_slack_post($this->getTitle());
+      if(isset($resp['ok']))
+      {
+        $this->slack_thread_ts = $resp['ts'];
+        return;
+      }
+      sleep(1);
+    }
+    throw new Exception("Could not create Slack thread");
+  }
 
-  // function updateSlackThread()
-  // {
-  //   $issues_summary = '';
-  //   foreach($this->getProblemsHistogram() as $code => $count)
-  //   {
-  //     if($code == ATFTask::CODE_GONE)
-  //       $issues_summary .= " gones:$count";
-  //     else if($code == ATFTask::CODE_NSTART)
-  //       $issues_summary .= " nstrts:$count";
-  //     else if($code == ATFTask::CODE_STUCK)
-  //       $issues_summary .= " stucks:$count";
-  //     else if($code == ATFTask::CODE_HUNG)
-  //       $issues_summary .= " hungs:$count";
-  //     else if($code == ATFTask::CODE_EXCEPTION)
-  //       $issues_summary .= " excepts:$count";
-  //     else if($code == ATFTask::CODE_WARN)
-  //       $issues_summary .= " warns:$count";
-  //   }
+  function updateSlackThread()
+  {
+    $issues_summary = '';
+    foreach($this->getProblemsHistogram() as $code => $count)
+    {
+      if($code == ATFTask::CODE_GONE)
+        $issues_summary .= " gones:$count";
+      else if($code == ATFTask::CODE_NSTART)
+        $issues_summary .= " nstrts:$count";
+      else if($code == ATFTask::CODE_STUCK)
+        $issues_summary .= " stucks:$count";
+      else if($code == ATFTask::CODE_HUNG)
+        $issues_summary .= " hungs:$count";
+      else if($code == ATFTask::CODE_EXCEPTION)
+        $issues_summary .= " excepts:$count";
+      else if($code == ATFTask::CODE_WARN)
+        $issues_summary .= " warns:$count";
+    }
 
-  //   $running_count = 0;
-  //   $over_count = 0;
-  //   $total_progress = 0;
+    $running_count = 0;
+    $over_count = 0;
+    $total_progress = 0;
 
-  //   foreach($this->tasks as $task)
-  //   {
-  //     $total_progress += $task->getProgress();
-  //     if($task->isOver())
-  //       $over_count++;
-  //     if($task->device)
-  //       $running_count++;
-  //   }
-  //   $progress_txt = ' tasks:' . ($running_count > 0 ? $running_count . '/' : '') . $over_count . '/' . sizeof($this->tasks) . ' (' . round($total_progress/sizeof($this->tasks)*100, 2) . '%)';
+    foreach($this->tasks as $task)
+    {
+      $total_progress += $task->getProgress();
+      if($task->isOver())
+        $over_count++;
+      if($task->device)
+        $running_count++;
+    }
+    $progress_txt = ' tasks:' . ($running_count > 0 ? $running_count . '/' : '') . $over_count . '/' . sizeof($this->tasks) . ' (' . round($total_progress/sizeof($this->tasks)*100, 2) . '%)';
 
-  //   atf_slack_update($this->slack_thread_ts,
-  //     array(array(
-  //       "text" => $this->getTitle() . $issues_summary . $progress_txt,
-  //       "color" => $this->_getThreadColor(),
-  //       "mrkdwn_in" => array("text")
-  //     ))
-  //   );
-  // }
+    atf_slack_update($this->slack_thread_ts,
+      array(array(
+        "text" => $this->getTitle() . $issues_summary . $progress_txt,
+        "color" => $this->_getThreadColor(),
+        "mrkdwn_in" => array("text")
+      ))
+    );
+  }
 
   function getProblemsHistogram()
   {
@@ -486,7 +485,7 @@ class ATFPlan
   {
     $this->session->ignored_devices[] = $device;
     atf_log("Ignoring device *$device*: $reason");
-    // atf_slack_post("Ignoring device *$device*: $reason", array('thread_ts' => $this->slack_thread_ts));
+    atf_slack_post("Ignoring device *$device*: $reason", array('thread_ts' => $this->slack_thread_ts));
   }
 
   function getDevices()
@@ -544,7 +543,7 @@ class ATFPlan
 
   function runAsync(ATFApkInstaller $install, $sleep_time, $hung_threshold, $gone_threshold, $stuck_threshold)
   {
-    // $this->createSlackThread();
+    $this->createSlackThread();
 
     $this->session->resetBogusDevices();
 
@@ -562,7 +561,7 @@ class ATFPlan
     return Amp\call(function() use($task, $install, $sleep_time, $hung_threshold, $gone_threshold, $stuck_threshold) {
       while(!$this->isOver() && !$task->isOver())
       {
-        // $this->updateSlackThread();
+        $this->updateSlackThread();
 
         yield Amp\delay((int)$sleep_time*1000);
 
@@ -596,7 +595,7 @@ class ATFPlan
         }
       }
 
-      // $this->updateSlackThread();
+      $this->updateSlackThread();
     });
   }
 
@@ -612,7 +611,7 @@ class ATFPlan
     $task->device = $device;
     try
     {
-      // atf_slack_post("Preparing *{$task->device}*", array('thread_ts' => $this->slack_thread_ts));
+      atf_slack_post("Preparing *{$task->device}*", array('thread_ts' => $this->slack_thread_ts));
 
       yield $install->installAsync($device);
       yield atf_start_ext_cmd_on_device_async($device, $task->getCmd(), $task->getCmdArgs());
@@ -634,20 +633,20 @@ class ATFPlan
   {
     return Amp\call(function() use($task) {
 
-    // $this->_postScreenToSlack($task);
+    $this->_postScreenToSlack($task);
 
     $fatal_msg = "Fatal problem ({$task->last_fatal_problem} - ".ATFTask::code2string($task->last_fatal_problem)."), attempt:{$task->attempts} *{$task->device}*";
 
     atf_log("[FTL] $fatal_msg");
 
-    // atf_slack_post($fatal_msg, array('thread_ts' => $task->slack_thread_ts));
+    atf_slack_post($fatal_msg, array('thread_ts' => $task->slack_thread_ts));
 
     if($task->last_fatal_problem == ATFTask::CODE_GONE || 
        $task->last_fatal_problem == ATFTask::CODE_HUNG)  
     {
       $app_log = atf_get_logcat_unity($task->device, 300);
       $app_log = _atf_trim_start($app_log, 2000);
-      // atf_slack_post("Last logs: ```$app_log``` *{$task->device}*", array('thread_ts' => $task->slack_thread_ts));
+      atf_slack_post("Last logs: ```$app_log``` *{$task->device}*", array('thread_ts' => $task->slack_thread_ts));
     }
 
     if (!taskman_prop('EXT_BOT_ERROR_PAUSE'))
@@ -787,7 +786,7 @@ class ATFPlan
 
     if($device_is_bogus)
     {
-      // $this->_reportErrorFromLogcatToSlack($task, 1000);
+      $this->_reportErrorFromLogcatToSlack($task, 1000);
       $this->_incAndCheckBogusDevice($task->device);
     }
 
@@ -827,21 +826,21 @@ class ATFPlan
     atf_log($shell_msg);
   }
 
-  // function _postToSlackExtStatusItem(ATFTask $task, array $item)
-  // {
-  //   $orig_msg = _atf_trim($item['message'], 3000);
-  //   $slack_msg = $orig_msg;
+  function _postToSlackExtStatusItem(ATFTask $task, array $item)
+  {
+    $orig_msg = _atf_trim($item['message'], 3000);
+    $slack_msg = $orig_msg;
 
-  //   if($item['error'] == ATFTask::CODE_EXCEPTION)
-  //     $slack_msg = "```$slack_msg```";
+    if($item['error'] == ATFTask::CODE_EXCEPTION)
+      $slack_msg = "```$slack_msg```";
 
-  //   $slack_msg = '('.round($item['time'],1).'s) '.$slack_msg.' *'.$task->device.'*';
+    $slack_msg = '('.round($item['time'],1).'s) '.$slack_msg.' *'.$task->device.'*';
 
-  //   $resp = atf_slack_post($slack_msg, array('thread_ts' => $task->slack_thread_ts));
+    $resp = atf_slack_post($slack_msg, array('thread_ts' => $task->slack_thread_ts));
 
-  //   if(isset($resp['ok']) && $item['error'] == ATFTask::CODE_EXCEPTION)
-  //     $this->session->tryShareToQAChannel($resp['ts'], $orig_msg);
-  // }
+    if(isset($resp['ok']) && $item['error'] == ATFTask::CODE_EXCEPTION)
+      $this->session->tryShareToQAChannel($resp['ts'], $orig_msg);
+  }
 
   function _analyzeExtStatusItemAsync(ATFTask $task, array $item)
   {
@@ -890,34 +889,34 @@ class ATFPlan
     else if($msg_type === '[WRN]')
     {
       $task->addStatusCode(ATFTask::CODE_WARN);
-      // $this->_postToSlackExtStatusItem($task, $item);
+      $this->_postToSlackExtStatusItem($task, $item);
     }
     else if($msg_type === null)
     {
-      // $this->_postToSlackExtStatusItem($task, $item);
+      $this->_postToSlackExtStatusItem($task, $item);
     }
 
     });
   }
 
-  // function _reportErrorFromLogcatToSlack(ATFTask $task, $limit)
-  // {
-  //   $errors_log = _atf_trim(atf_get_logcat_errors($task->device, $limit), 3000);
-  //   if($errors_log)
-  //     atf_slack_post("```$errors_log``` *{$task->device}*", array('thread_ts' => $task->slack_thread_ts));
-  // }
+  function _reportErrorFromLogcatToSlack(ATFTask $task, $limit)
+  {
+    $errors_log = _atf_trim(atf_get_logcat_errors($task->device, $limit), 3000);
+    if($errors_log)
+      atf_slack_post("```$errors_log``` *{$task->device}*", array('thread_ts' => $task->slack_thread_ts));
+  }
 
-  // function _postScreenToSlack(ATFTask $task)
-  // {
-  //   global $GAME_ROOT;
+  function _postScreenToSlack(ATFTask $task)
+  {
+    global $GAME_ROOT;
 
-  //   $png_data = atf_screen($task->device);
-  //   if($png_data)
-  //   {
-  //     ensure_write("$GAME_ROOT/build/atf/screen.png", $png_data);
-  //     atf_slack_post_png("screen", "$GAME_ROOT/build/atf/screen.png", array('thread_ts' => $task->slack_thread_ts));
-  //   }
-  // }
+    $png_data = atf_screen($task->device);
+    if($png_data)
+    {
+      ensure_write("$GAME_ROOT/build/atf/screen.png", $png_data);
+      atf_slack_post_png("screen", "$GAME_ROOT/build/atf/screen.png", array('thread_ts' => $task->slack_thread_ts));
+    }
+  }
 }
 
 
@@ -1309,10 +1308,11 @@ function _atf_db()
   return $db;
 }
 
+
 function atf_stats_send($table, array $data)
 {
-  $db = _atf_db();
   return;
+  $db = _atf_db();
   $db->insert($table, array(array_values($data)), array_keys($data));
 }
 
diff --git a/composer.json b/composer.json
index 00b070a..c3b7019 100644
--- a/composer.json
+++ b/composer.json
@@ -6,6 +6,7 @@
          "php": ">=7.4"
      },
      "autoload": {
-         "classmap": ["atf.inc.php"]
+         "classmap": ["atf.inc.php"],
+         "classmap": ["slack.inc.php"]
      }
  }
\ No newline at end of file
diff --git a/slack.inc.php b/slack.inc.php
new file mode 100644
index 0000000..e027d42
--- /dev/null
+++ b/slack.inc.php
@@ -0,0 +1,180 @@
+<?php
+namespace taskman;
+use Amp;
+use Exception;
+use CURLFile;
+
+function slack_msg($token, $channel, $msg, $fields = []) 
+{
+  $ch = curl_init("https://slack.com/api/chat.postMessage");
+
+  $fields["token"] = $token;
+  if(!isset($fields['channel']))
+    $fields["channel"] = $channel;
+  $fields["text"] = $msg;
+  $fields["as_user"] = "bitgames bot";
+  
+  curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
+  curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($fields));
+  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
+  //curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
+  //curl_setopt($ch, CURLOPT_VERBOSE, true);
+
+  $result = curl_exec($ch);
+  curl_close($ch);
+
+  return json_decode($result, true);
+}
+
+
+function slack_upload_image($token, array $channels, $filepath)
+{
+  $url = "https://slack.com/api/files.upload";
+
+  $cfile = new CURLFile(realpath($filepath), 'image/jpg', 'test.jpg');
+  $fields = array(
+    'token'    => $token,
+    'channels' => implode(",", $channels),
+    'file'     => $cfile,
+    'filename' => "test.jpg",
+  );
+  
+  $ch = curl_init();
+  curl_setopt($ch, CURLOPT_URL,             $url);
+  curl_setopt($ch, CURLOPT_HEADER,          false);
+  curl_setopt($ch, CURLOPT_POST,            true);
+  curl_setopt($ch, CURLOPT_POSTFIELDS,      $fields);
+  curl_setopt($ch, CURLOPT_RETURNTRANSFER,  true);
+  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,  false);
+  curl_setopt($ch, CURLOPT_FOLLOWLOCATION,  true);
+  curl_setopt($ch, CURLOPT_VERBOSE,         true);
+  $result = curl_exec($ch);
+  curl_close($ch);
+
+  $arr = json_decode($result, true);
+  if(isset($arr['ok']) && $arr['ok'] == 1)
+  {
+    if(isset($arr['file']['permalink_public']))
+      return $arr['file']['permalink_public'];
+  } 
+      
+  return "";
+}
+
+function _atf_slack_chan()
+{
+  return get("ATF_SLACK_CHANNEL");
+}
+
+function _atf_slack_chan_qa()
+{
+  return get("ATF_SLACK_CHANNEL");
+}
+
+function _atf_slack_token()
+{
+  $token = "xoxb-141599046048-1567053090644-2gDAoWGiZxFTtXGLMOOeLG2u";
+  return $token;
+}
+
+task('slack_test', function()
+{
+  // createSlackThread();
+  // atf_slack_post('hi', array('channel' => _atf_slack_chan_qa()));
+});
+
+function atf_slack_post($message, $fields = array())
+{
+  if(!get("ATF_SLACK"))
+    return array('ok' => true, 'ts' => 0);
+
+  $ch = curl_init("https://slack.com/api/chat.postMessage");
+  $fields["token"] = _atf_slack_token();
+  if(!isset($fields['channel']))
+    $fields["channel"] = _atf_slack_chan();
+  $fields["text"] = $message;
+  
+  curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
+  curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($fields));
+  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
+
+  $result = curl_exec($ch);
+  curl_close($ch);
+
+  return json_decode($result, true);
+}
+
+function atf_slack_get_permalink($message_ts, $channel = null)
+{
+  if(!get("ATF_SLACK"))
+    return array('permalink' => '');
+
+  $ch = curl_init("https://slack.com/api/chat.getPermalink");
+  $fields["token"] = _atf_slack_token();
+  if($channel === null)
+    $channel = _atf_slack_chan();
+  $fields["channel"] = $channel;
+  $fields["message_ts"] = $message_ts;
+  
+  curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
+  curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($fields));
+  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
+
+  $result = curl_exec($ch);
+  curl_close($ch);
+
+  return json_decode($result, true);
+}
+
+function atf_slack_update($ts, array $attachments)
+{
+  if(!get("ATF_SLACK"))
+    return array('ok' => true);
+
+  $ch = curl_init("https://slack.com/api/chat.update");
+  $fields["token"] = _atf_slack_token();
+  $fields["channel"] = _atf_slack_chan();
+  $fields["ts"] = $ts;
+  $fields["attachments"] = json_encode($attachments);
+  
+  curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
+  curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($fields));
+  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
+
+  $result = curl_exec($ch);
+  curl_close($ch);
+
+  return json_decode($result, true);
+}
+
+
+function atf_slack_post_png($title, $png_file, $fields = array())
+{
+  if(!get("ATF_SLACK"))
+    return array('ok' => true);
+
+  $file = new CurlFile($png_file, 'image/png');
+
+  $header = array();
+  $header[] = 'Content-Type: multipart/form-data';
+
+  $fields["token"] = _atf_slack_token();
+  $fields["channels"] = _atf_slack_chan();
+  $fields['file'] =  $file;
+  $fields['title'] = $title;
+
+  $ch = curl_init("https://slack.com/api/files.upload");
+  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+  curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
+  curl_setopt($ch, CURLOPT_POST, 1);
+  curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
+
+  $result = curl_exec($ch);
+  curl_close($ch);
+  
+  return json_decode($result, true);
+}
\ No newline at end of file