diff --git a/README.md b/README.md
index 3518286..c8e7cb4 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@ I have since switch to using C for better performance and control.
 - ✅ read tempature
 - ✅ read humidity
 - ✅ read atmospheric pressure
+- ✅  read partical matter PM1, PM2.5, and PM10
 - read partical matter PM1, PM2.5, and PM10
 - read noise levels
 - read wind speed
diff --git a/node1.c b/node1.c
index 4691fec..a26f7a4 100644
--- a/node1.c
+++ b/node1.c
@@ -11,11 +11,13 @@
 #include <stdio.h>
 
 #define LOOP_INTERVAL_MS 5000
+// TODO: put loop back to 30 seconds when done testing
 // #define LOOP_INTERVAL_MS 30000
 
 /**
  * Balcony Weather Station Node 1
  * record sensor data and send it to home assistant every 5 minutes
+ * Sensors: BME280, PMS5003
  */
 
 void comms_led_init() {