diff --git a/HARDWARE.md b/HARDWARE.md
new file mode 100644
index 0000000..52784ce
--- /dev/null
+++ b/HARDWARE.md
@@ -0,0 +1,30 @@
+
+---
+
+# Relay Wiring
+
+Current architecture uses the onboard relay contacts
+as the load switching device.
+
+Positive-side switching:
+
+    Battery +
+        |
+      Fuse
+        |
+      Relay COM
+        |
+      Relay NO
+        |
+      Load +
+
+Load negative returns directly to the ground bus.
+
+Relay 1:
+
+    Starlink Mini
+
+Relay 2:
+
+    Fridge
+
diff --git a/docs/PARITY_MATRIX.md b/docs/PARITY_MATRIX.md
index 37f3a14..5e87066 100644
--- a/docs/PARITY_MATRIX.md
+++ b/docs/PARITY_MATRIX.md
@@ -79,3 +79,31 @@ Error responses should include:
     error: "error_code"
 
 Status/config responses should preserve the generic data model used by `/status`.
+
+---
+
+# Project Status
+
+API/UART/USB parity status:
+
+    COMPLETE
+
+Covered:
+
+    Status
+    Configuration
+    Relays
+    WiFi
+    BMS
+    Temperature Sensors
+    Save Config
+    Factory Reset
+
+Future additions must be implemented on:
+
+    USB Serial
+    UART JSON
+    HTTP API
+
+before parity is considered maintained.
+
diff --git a/docs/TEMP_API.md b/docs/TEMP_API.md
new file mode 100644
index 0000000..22eb5d8
--- /dev/null
+++ b/docs/TEMP_API.md
@@ -0,0 +1,40 @@
+# Temperature API
+
+## Scan
+
+POST
+
+    /temps/scan
+
+Response:
+
+{
+  "type":"temp_scan_response",
+  "ok":true
+}
+
+## Assign
+
+POST
+
+    /temps/assign
+
+Body:
+
+{
+  "id":"temp_1",
+  "index":1
+}
+
+## Clear
+
+POST
+
+    /temps/clear
+
+Body:
+
+{
+  "id":"temp_1"
+}
+
diff --git a/docs/TEMP_SETUP.md b/docs/TEMP_SETUP.md
new file mode 100644
index 0000000..2541d83
--- /dev/null
+++ b/docs/TEMP_SETUP.md
@@ -0,0 +1,50 @@
+# DS18B20 Temperature Sensor Setup
+
+## Wiring
+
+All DS18B20 sensors share a single 1-Wire bus.
+
+ESP32:
+
+    GPIO4 = DATA
+    3.3V  = VCC
+    GND   = GND
+
+Required pullup:
+
+    4.7k resistor between DATA and 3.3V
+
+Example:
+
+    3.3V -----+---------------- Sensor Red
+              |
+             4.7k
+              |
+    GPIO4 ----+---------------- Sensor Yellow
+
+    GND ----------------------- Sensor Black
+
+## Multiple Sensors
+
+All sensors share the same bus:
+
+    DATA
+    VCC
+    GND
+
+Only one 4.7k pullup resistor is required.
+
+## Scan
+
+    scan temps
+
+Example output:
+
+    DS18B20 Sensors Found:
+    1) 28:7D:56:25:00:00:00:34
+
+## Assign
+
+    assign temp 1 1
+    save
+
diff --git a/docs/testing/http-api-tests.md b/docs/testing/http-api-tests.md
new file mode 100644
index 0000000..7a8dd1d
--- /dev/null
+++ b/docs/testing/http-api-tests.md
@@ -0,0 +1,36 @@
+# HTTP API Validation
+
+## Status
+
+curl -s http://ESP32_IP/status | jq
+
+## Relay On
+
+curl -X POST http://ESP32_IP/relay/set \
+-H "Content-Type: application/json" \
+-d '{"id":"relay_1","state":true}'
+
+## Relay Off
+
+curl -X POST http://ESP32_IP/relay/set \
+-H "Content-Type: application/json" \
+-d '{"id":"relay_1","state":false}'
+
+## Scan Temps
+
+curl -X POST http://ESP32_IP/temps/scan
+
+## WiFi Config
+
+curl -X POST http://ESP32_IP/config/wifi \
+-H "Content-Type: application/json" \
+-d '{
+  "networks":[
+    {
+      "ssid":"Starlink",
+      "password":"PASSWORD",
+      "priority":1
+    }
+  ]
+}'
+
diff --git a/docs/testing/uart-tests.md b/docs/testing/uart-tests.md
new file mode 100644
index 0000000..f8c4c34
--- /dev/null
+++ b/docs/testing/uart-tests.md
@@ -0,0 +1,26 @@
+# UART Validation
+
+## Status
+
+{"type":"status_request"}
+
+## Relay On
+
+{"type":"set_relay","id":"relay_1","state":true}
+
+## Relay Off
+
+{"type":"set_relay","id":"relay_1","state":false}
+
+## Scan Temps
+
+{"type":"scan_temps"}
+
+## Assign Temp
+
+{"type":"assign_temp","id":"temp_1","index":1}
+
+## Clear Temp
+
+{"type":"clear_temp","id":"temp_1"}
+