From 204a859871b746416741c59042948752fcb41950 Mon Sep 17 00:00:00 2001
From: Eric Swanson <eswanson@alloscomp.com>
Date: Wed, 29 Oct 2025 18:09:00 -0400
Subject: [PATCH 1/2] Add Eufy T9146 decoder

Missing BMI data
---
 src/devices.h                    |  2 ++
 src/devices/T9146_json.h         | 40 ++++++++++++++++++++++++++++++++
 tests/python_ble/decoder_test.py | 10 +++++++-
 3 files changed, 51 insertions(+), 1 deletion(-)
 create mode 100644 src/devices/T9146_json.h

diff --git a/src/devices.h b/src/devices.h
index 7763e683e..282b8c0a5 100644
--- a/src/devices.h
+++ b/src/devices.h
@@ -139,6 +139,7 @@
 #include "devices/SBHT_003C_json.h"
 #include "devices/SBHT_003C_ENCR_json.h"
 #include "devices/VCH6003_json.h"
+#include "devices/T9146_json.h"
 
 
 const char* _devices[][2] = {
@@ -289,4 +290,5 @@ const char* _devices[][2] = {
     {_SBHT_003C_json, _SBHT_003C_json_props},
     {_SBHT_003C_ENCR_json, _SBHT_003C_ENCR_json_props},
     {_VCH6003_json, _VCH6003_json_props},
+    {_T9146_json, _T9146_json_props},
 };
diff --git a/src/devices/T9146_json.h b/src/devices/T9146_json.h
new file mode 100644
index 000000000..51af45308
--- /dev/null
+++ b/src/devices/T9146_json.h
@@ -0,0 +1,40 @@
+const char* _T9146_json = "{\"brand\":\"eufy\",\"model\":\"Smart Scale C1\",\"model_id\":\"T9146\",\"tag\":\"05\",\"condition\":[\"manufacturerdata\",\"index\",0,\"cfe50c\",\"&\",\"name\",\"contain\",\"eufy T9146\"],\"properties\":{\"weighing_mode\":{\"decoder\":[\"static_value\",\"person\"]},\"unit\":{\"decoder\":[\"static_value\",\"kg\"]},\"weight\":{\"decoder\":[\"value_from_hex_data\",\"manufacturerdata\",18,4,true,false],\"post_proc\":[\"/\",100]}}}";
+/*R""""(
+{
+   "brand":"eufy",
+   "model":"Smart Scale C1",
+   "model_id":"T9146",
+   "tag":"05",
+   "condition":["manufacturerdata", "index", 0, "cfe50c", "&", "name", "contain", "eufy T9146"],
+   "properties":{
+      "weighing_mode":{
+         "decoder":["static_value", "person"]
+      },
+      "unit":{
+         "decoder":["static_value", "kg"]
+      },
+      "weight":{
+         "decoder":["value_from_hex_data", "manufacturerdata", 18, 4, true, false],
+         "post_proc":["/", 100]
+      }
+   }
+})"""";*/
+
+const char* _T9146_json_props = "{\"properties\":{\"weighing_mode\":{\"unit\":\"string\",\"name\":\"weighing_mode\"},\"unit\":{\"unit\":\"string\",\"name\":\"unit\"},\"weight\":{\"unit\":\"kg\",\"name\":\"weight\"}}}";
+/*R""""(
+{
+   "properties":{
+      "weighing_mode":{
+         "unit":"string",
+         "name":"weighing_mode"
+      },
+      "unit":{
+         "unit":"string",
+         "name":"unit"
+      },
+      "weight":{
+         "unit":"kg",
+         "name":"weight"
+      }
+   }
+})"""";*/
diff --git a/tests/python_ble/decoder_test.py b/tests/python_ble/decoder_test.py
index 4e21f5b7d..32ddb640d 100644
--- a/tests/python_ble/decoder_test.py
+++ b/tests/python_ble/decoder_test.py
@@ -4,6 +4,14 @@
 import json
 
 x = {"servicedata":"712098004a63b6658d7cc40d071003f32600"}
+x = {
+  "id": "CF:E5:0C:03:01:EC",
+  "mac_type": 0,
+  "adv_type": 0,
+  "name": "eufy T9146",
+  "manufacturerdata": "cfe50c0301eccf0000460500000001008d5d9146",
+  "rssi": -61
+}
 z = dble(json.dumps(x))
 print(z, "\n")
 
@@ -16,4 +24,4 @@
 y = {}
 z = dble(json.dumps(y))
 print("decoder result (None expected): ", z)
-print("Done")
\ No newline at end of file
+print("Done")

From fafd9736f99752cb1c331d66af4147aae76fb351 Mon Sep 17 00:00:00 2001
From: Eric Swanson <eswanson@alloscomp.com>
Date: Wed, 29 Oct 2025 18:19:58 -0400
Subject: [PATCH 2/2] Just kidding, it works now

---
 src/devices/T9146_json.h         | 7 ++++++-
 tests/python_ble/decoder_test.py | 2 +-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/devices/T9146_json.h b/src/devices/T9146_json.h
index 51af45308..7c5c5bb04 100644
--- a/src/devices/T9146_json.h
+++ b/src/devices/T9146_json.h
@@ -5,7 +5,7 @@ const char* _T9146_json = "{\"brand\":\"eufy\",\"model\":\"Smart Scale C1\",\"mo
    "model":"Smart Scale C1",
    "model_id":"T9146",
    "tag":"05",
-   "condition":["manufacturerdata", "index", 0, "cfe50c", "&", "name", "contain", "eufy T9146"],
+   "condition":["manufacturerdata", "index", 0, "cf", "manufacturerdata", "index", 12, "cf", "&", "name", "contain", "eufy T9146"],
    "properties":{
       "weighing_mode":{
          "decoder":["static_value", "person"]
@@ -19,6 +19,11 @@ const char* _T9146_json = "{\"brand\":\"eufy\",\"model\":\"Smart Scale C1\",\"mo
       }
    }
 })"""";*/
+// manufacturerdata starts with the mac address (6 bytes / 12 hex chars)
+// then constant "cf" plus 13 more bytes / 26 more chars
+// total length is 40 chars / 20 bytes
+// weight is encoded in hex char position 18 to 22, little endian, as 100ths of kg
+// for example, cfe50c0301eccfa2128c232624540100874a9146 => 8c23 => 0x238c => 91.00 kg
 
 const char* _T9146_json_props = "{\"properties\":{\"weighing_mode\":{\"unit\":\"string\",\"name\":\"weighing_mode\"},\"unit\":{\"unit\":\"string\",\"name\":\"unit\"},\"weight\":{\"unit\":\"kg\",\"name\":\"weight\"}}}";
 /*R""""(
diff --git a/tests/python_ble/decoder_test.py b/tests/python_ble/decoder_test.py
index 32ddb640d..5b9ba67d8 100644
--- a/tests/python_ble/decoder_test.py
+++ b/tests/python_ble/decoder_test.py
@@ -9,7 +9,7 @@
   "mac_type": 0,
   "adv_type": 0,
   "name": "eufy T9146",
-  "manufacturerdata": "cfe50c0301eccf0000460500000001008d5d9146",
+  "manufacturerdata": "cfe50c0301eccfa2128c232624540100874a9146",
   "rssi": -61
 }
 z = dble(json.dumps(x))