diff --git a/measurements/.mkdir b/measurements/.mkdir
deleted file mode 100644
index e69de29..0000000
--- a/measurements/.mkdir
+++ /dev/null
diff --git a/pack_results.sh b/pack_results.sh
new file mode 100755
index 0000000..0721696
--- /dev/null
+++ b/pack_results.sh
@@ -0,0 +1,2 @@
+#!/bin/bash
+zip results.zip build/*/*.log measurements/* compile_all.log compile_all.err.log build/test_all.sh
diff --git a/templates/esp32/platformio.ini b/templates/esp32/platformio.ini
index a495eb0..230f337 100644
--- a/templates/esp32/platformio.ini
+++ b/templates/esp32/platformio.ini
@@ -2,3 +2,5 @@
 platform = espressif32
 framework = arduino
 board = esp32dev
+build_flags = -O2
+build_unflags = -Os
diff --git a/test.py b/test.py
index 4192ae2..07bd135 100755
--- a/test.py
+++ b/test.py
@@ -137,7 +137,7 @@ def begin_measurement():
     import saleae
     import time
     sal = saleae.Saleae()
-    sal.set_active_channels([0, 1, 2, 3], [])
+    sal.set_active_channels([1, 2], [])
     sal.set_sample_rate(sal.get_all_sample_rates()[0])
     sal.set_capture_seconds(6000)
     sal.capture_start()