Differences

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--- ircterm [2015-01-11 20:00] – [Main Hardware Components] rob
+++ ircterm [2021-05-21 14:00] (current) – simon
@@ Line 1: / Line 1: @@
-==== Project Background ====
+===== Hardware Status =====
+Normal screen is currently <del>out of action</del> **gubbed**. Tim recommends checking caps however not enough time was available on the day of discovering the screen being out. A temporary screen has been put in place to allow for interim IRC usage.
+===== Project Background =====
 Rob wanted a way to promote IRC use and make it feel more part of the lab rather than a separate 'IRC club', and also open it up to non-IRC users and provide a way to quickly reply. Similar IRC terminals exist at other hackerspaces, such as [[http://helsinki.hacklab.fi|Helsinki Hacklab]].
@@ Line 5: / Line 9: @@
 {{:img_20150111_150838.jpg?direct&300|}}
-==== Main Hardware Components ====
+===== Main Hardware Components =====
-  * Raspberry Pi A+
+  * Raspberry Pi A+ & [[http://www.thingiverse.com/thing:566506|3D printed case]]
   * Some crappy 'PiHut' rt2800-based wifi dongle
   * Optiquest Q22wb (Viewsonic/BENQ) 22" 1680x1050 (16:10) TFT mounted vertically, provided by shabble
@@ Line 15: / Line 19: @@
 {{:img_20150110_015443.jpg?direct&300|}}
-==== Piecing it together ====
+===== Piecing it together =====
 The Pi is back-powered via the hub, which is in turn back-powered via a small in-line 5v 1A PSU originally for a Zip drive. There are a few of these useful PSUs in use in the lab. The back-powering is a result of only wanting to use bits in the 'cables for butchering' box.
@@ Line 27: / Line 31: @@
 {{:img_20150110_043139.jpg?direct&300|}}
-==== Wifi ====
+===== Wifi =====
 Terminal is connected to the main 'Hacklab' network. Wifi was showing to be very unreliable in 'n' mode. Having forced an arbitrary speed of 22Mbit/s, the wifi is now stable. Other Pis using similar dongles have experienced high latency and loss too. The problem doesn't exist when connected to different access points.
@@ Line 47: / Line 51: @@
 </code>
+=== Automatically reconnecting wifi ===
-==== OS Config ====
+/etc/rc.local:
+<code>
+/root/wifimonitor 2>&1 &
+</code>
+/root/wifimonitor:
+<code>
+#!/bin/bash
+while true ; do
+   if ifconfig wlan0 | grep -q "inet addr:" ; then
+      sleep 60
+   else
+      ifdown wlan0
+      sleep 10
+      ifup --force wlan0
+      sleep 10
+   fi
+done
+</code>
+===== OS Config =====
 Stock Raspbian with all x11-* and various other things removed.
@@ Line 78: / Line 104: @@
 Terminus font in UTF8, at size 16x32.
-==== Powering on/off the screen automatically ====
+===== Powering on/off the screen automatically =====
 The screen turns off when the lab is empty and turns back on again as soon as someone enters the lab and triggers the PIR. This happens via the message bus and is handled by idle.py which is currently run from rc.local. idle.py was written by Tim initially.
@@ Line 89: / Line 115: @@
 /home/pi/idle.py:
 <code>
-#!/usr/bin/python
+#!/usr/bin/env python
-import logging
+import paho.mqtt.client as mqtt
-import os
+import subprocess
-import pika
-import time
-logging.getLogger('').setLevel(logging.INFO)
+last_state = None
-logging.getLogger('pika').setLevel(logging.ERROR)
-amqp_host = "amqp.hacklab"
+def on_connect(client, userdata, flags, rc):
-amqp_exchange = "events"
+    client.subscribe("sensor/global/presence")
-topic = "presence.status"
-tvstate = False
+def on_message(client, userdata, msg):
+    global last_state
-connection = pika.BlockingConnection(pika.ConnectionParameters(host=amqp_host))
+    # ignore retained (non-realtime) messages
-channel = connection.channel()
+    #if msg.retain:
-channel.exchange_declare(exchange=amqp_exchange, type="topic")
+    #    return
-result = channel.queue_declare(exclusive=True)
+    if last_state != msg.payload:
-queue_name = result.method.queue
+        # state has changed
-channel.queue_bind(exchange=amqp_exchange, queue=queue_name, routing_key=topic)
+        if msg.payload == "active":
+            # screen on
+            subprocess.call("tvservice -p", shell=True)
+        elif msg.payload == "empty":
+            # screen off
+            subprocess.call("tvservice -o", shell=True)
+        last_state = msg.payload
-def callback(ch, method, properties, body):
+m = mqtt.Client()
-    global tvstate
+m.on_connect = on_connect
+m.on_message = on_message
+m.connect("mqtt")
+m.loop_forever()
+</code>
-    changed = properties.headers['changed']
+Required to run:
-    state = properties.headers['state']
-    old_state = properties.headers.get('old_state', None)
-    if state == 'ACTIVE':
+<code>
-        if tvstate == False:
+apt-get install python-pip
-            os.system("tvservice -p")
+pip install paho-mqtt
-            tvstate = True
-    elif state == 'EMPTY':
-        os.system("tvservice -o")
-        tvstate = False
-channel.basic_consume(callback,
-                      queue=queue_name,
-                      no_ack=True)
-channel.start_consuming()
 </code>
-Required to run:
+Log file of TV status (due to people wondering if it doesn't actually ever turn off):
 <code>
-apt-get install python-pika
+~/idle.log
 </code>
-==== Irssi config ====
+===== Irssi config =====
 Summary:
-  * Auto connect to freenode
+  * Auto connect to Libera
   * NickServ identification
   * Main channel window with only PUBLICS, ACTIONS and  NICKS.
@@ Line 153: / Line 175: @@
 servers = (
   {
-    address = "irc.freenode.net";
+    address = "irc.libera.chat";
-    chatnet = "freenode";
+    chatnet = "libera";
-    port = "6667";
+    port = "6697";
-    use_ssl = "no";
+    use_ssl = "yes";
-    ssl_verify = "no";
+    ssl_verify = "yes";
     autoconnect = "yes";
   }
@@ Line 163: / Line 185: @@
 chatnets = {
-  freenode = {
+  libera = {
     type = "IRC";
     autosendcmd = "/^msg nickserv identify <PASSWORD>;/^win 2";
@@ Line 172: / Line 194: @@
   { name = "#irssi"; chatnet = "ircnet"; autojoin = "No"; },
   { name = "silc"; chatnet = "silc"; autojoin = "No"; },
-  { name = "#edinhacklab"; chatnet = "freenode"; autojoin = "yes"; }
+  { name = "#edinhacklab"; chatnet = "libera"; autojoin = "yes"; }
 );
@@ Line 370: / Line 392: @@
         chat_type = "IRC";
         name = "#edinhacklab";
-        tag = "freenode";
+        tag = "libera";
       }
     );
@@ Line 384: / Line 406: @@
-==== Playing the sound ====
+===== Playing the sound =====
 Part of the 'hacksense' stuff has been copied over:
   * /srv/hacksense/bin/request-soundfile
-  * /srv/hacksense/lib/hacksense.py
-The following was required for hacksense.py but has been suggested by Tim that any Redis stuff should be removed from hacksense.py instead.
-<code>
-apt-get install python-redis
-</code>
   * uhoh.mp3 is on doorbot which has the speaker attached to it.
 In irssi config: beep_cmd = "/srv/hacksense/bin/request-soundfile uhoh.mp3 &"