diff --git a/custom_field_list.json b/custom_field_list.json
index f2c4c41..ff39647 100644
--- a/custom_field_list.json
+++ b/custom_field_list.json
@@ -112,5 +112,16 @@
         ["PDOP", "divide_by_100"],
         ["AVG_SNR", "divide_by_100"]
     ]
+},
+"KD2EAT-DFM": {
+    "comment": "custom fields for KD2EAT DFM17 testing",
+    "struct": "<hhBHBx",
+    "fields": [
+        ["ascent_rate", "divide_by_100"],
+        ["ext_temperature", "divide_by_10"],
+        ["ext_humidity", "none"],
+        ["ext_pressure", "divide_by_10"],
+        ["mcu_calibration", "none"]
+    ]
 }
 }
diff --git a/payload_id_list.txt b/payload_id_list.txt
index ff27d2e..b4301ea 100644
--- a/payload_id_list.txt
+++ b/payload_id_list.txt
@@ -378,6 +378,7 @@
 498, SP6ZWR
 499, SP3RST
 500, SP2ROC
+501, KD2EAT-DFM
 31415, HORUS-V2
 31416, ITSWINDY
 31417, HORUSRADMON