wip

5 files changed, 11 insertions, 3 deletions

diff --git a/assignments/mqtt-with-button/mqtt-with-button.md b/assignments/mqtt-with-button/mqtt-with-button.md
index 77f0b22..c825615 100644
--- a/assignments/mqtt-with-button/mqtt-with-button.md
+++ b/assignments/mqtt-with-button/mqtt-with-button.md
@@ -16,13 +16,17 @@ Wire up this schematic on the bread board:
 
 # Step 2
 
-* Read button, print message on terminal
+* Tip: change upload speed to max.
+
+* Read button in `loop()`. If the button's state changes, print a
+  message.
+
+*Note:* reading the button in a busy loop is not really a best
+practice as it uses lots of energy. Instead use the `attachInterrupt`.
 
 # Step 3
 
 * Connect to the Wi-Fi network
-    * Use `WiFi.localIP()`
-
 * Connect to MQTT broker
 
 # Step 4
@@ -32,6 +36,10 @@ Wire up this schematic on the bread board:
 
 # Step 5 (Bonus)
 
+Subscripe to a topic and do something with the led.
+
+* Subscribe to the topic you're publishing to.
+
 * Subscribe to the topic `ndc/$device-id/led`.
  
 * Use the value to for example turn the LED on/off, or change the
diff --git a/assignments/mqtt-with-button/mqtt-with-button.pdf b/assignments/mqtt-with-button/mqtt-with-button.pdf
index 93079d7..8fcccf7 100644
--- a/assignments/mqtt-with-button/mqtt-with-button.pdf
+++ b/assignments/mqtt-with-button/mqtt-with-button.pdf
diff --git a/assignments/mqtt-with-button/schematic/mqtt-with-button.fzz b/assignments/mqtt-with-button/schematic/mqtt-with-button.fzz
index 57e5e5d..1f56f4e 100644
--- a/assignments/mqtt-with-button/schematic/mqtt-with-button.fzz
+++ b/assignments/mqtt-with-button/schematic/mqtt-with-button.fzz
diff --git a/assignments/mqtt-with-button/schematic/mqtt-with-button_bb.pdf b/assignments/mqtt-with-button/schematic/mqtt-with-button_bb.pdf
index aa0d283..8ba636a 100644
--- a/assignments/mqtt-with-button/schematic/mqtt-with-button_bb.pdf
+++ b/assignments/mqtt-with-button/schematic/mqtt-with-button_bb.pdf
diff --git a/assignments/mqtt-with-button/schematic/mqtt-with-button_schem.pdf b/assignments/mqtt-with-button/schematic/mqtt-with-button_schem.pdf
index 3ce5de3..5d97abf 100644
--- a/assignments/mqtt-with-button/schematic/mqtt-with-button_schem.pdf
+++ b/assignments/mqtt-with-button/schematic/mqtt-with-button_schem.pdf