diff --git a/components/pms5003/pms5003.c b/components/pms5003/pms5003.c
index b7c7aab..74e33ff 100644
--- a/components/pms5003/pms5003.c
+++ b/components/pms5003/pms5003.c
@@ -30,5 +30,11 @@ pms5003_err pms5003_init() {
 
 pms5003_err pms5003_read(void) {
   // uart_read_bytes
+  //   2 Start Bytes
+  //   2 Frame Length Bytes
+  //   26 (1 -> 13 pairs) Data Bytes (with nothing in 13)
+  //   2 Check Bytes - I think just add the low bits???
+  //   32 Bytes Total
+
   return PMS5003_OK;
 }