diff --git a/clover/src/selfcheck.py b/clover/src/selfcheck.py
index d98990e2..a8b194e0 100755
--- a/clover/src/selfcheck.py
+++ b/clover/src/selfcheck.py
@@ -643,13 +643,22 @@ def check_clover_service():
     elif 'failed' in output:
         failure('service failed to run, check your launch-files')
 
-    r = re.compile(r'^(.*)\[(FATAL|ERROR)\] \[\d+.\d+\]: (.*?)(\x1b(.*))?$')
+    BLACKLIST = 'Unexpected command 520', 'Time jump detected'
+
+    r = re.compile(r'^(.*)\[(FATAL|ERROR| WARN)\] \[\d+.\d+\]: (.*?)(\x1b(.*))?$')
     error_count = OrderedDict()
     try:
         for line in open('/tmp/clover.err', 'r'):
+            skip = False
+            for substr in BLACKLIST:
+                if substr in line:
+                    skip = True
+            if skip:
+                continue
+
             node_error = r.search(line)
             if node_error:
-                msg = node_error.groups()[1] + ': ' + node_error.groups()[2]
+                msg = node_error.groups()[1].strip() + ': ' + node_error.groups()[2]
                 if msg in error_count:
                     error_count[msg] += 1
                 else:
diff --git a/clover_blocks/www/python.js b/clover_blocks/www/python.js
index afc7ae09..1589cfdf 100644
--- a/clover_blocks/www/python.js
+++ b/clover_blocks/www/python.js
@@ -464,7 +464,7 @@ Blockly.Python.led_count = function(block) {
 
 function pigpio() {
 	Blockly.Python.definitions_['import_pigpio'] = 'import pigpio';
-	Blockly.Python.definitions_['init_pigpio'] = 'pi = pigpio.pi()';
+	Blockly.Python.definitions_['init_pigpio'] = 'pi = pigpio.pi()\nif not pi.connected: raise Exception(\'Cannot connect to pigpiod\')';
 }
 
 const GPIO_READ = `\ndef gpio_read(pin):
diff --git a/redirects.json b/redirects.json
index 17bdfd70..9c75611d 100644
--- a/redirects.json
+++ b/redirects.json
@@ -63,6 +63,7 @@
         { "from": "power/", "to": "en/power.html" },
         { "from": "connection/", "to": "en/connection.html" },
         { "from": "clover_vm/", "to": "en/simulation_vm.html" },
+        { "from": "gpio/", "to": "en/gpio.html" },
 
         { "from": "ru/microsd_images.html", "to": "image.html" },
         { "from": "en/microsd_images.html", "to": "image.html" }