Add configurable device name API

docs/api-and-serial-commands.md

@@ -36,6 +36,14 @@ Relay display names are configurable. Firmware and API clients should not assume
 
 Returns saved configuration.
 
+### POST /config/device
+
+Example:
+
+    {
+      "device_name": "Overland Controller"
+    }
+
 ### POST /config/relay
 
 Example:
@@ -89,6 +97,12 @@ Line ending:
     save
     factory reset
 
+## Device Configuration Commands
+
+    devicename Overland Controller
+
+Run `save` after changing the device name.
+
 ## Log Level Commands
 
     log quiet

firmware/esp32/overland-controller/overland-controller.ino

@@ -310,6 +310,12 @@ void handleDebugSerial() {
         return;
     }
 
+    if (command.startsWith("devicename ")) {
+        appConfig.deviceName = command.substring(11);
+        Serial.println("OK device name updated");
+        return;
+    }
+
     if (command.startsWith("relayname ")) {
         int firstSpace = command.indexOf(' ');
         int secondSpace = command.indexOf(' ', firstSpace + 1);
@@ -458,6 +464,22 @@ void handleGetConfig() {
     sendConfigJson();
 }
 
+void handleUpdateDeviceConfig() {
+    DynamicJsonDocument doc(512);
+    DeserializationError error = deserializeJson(doc, server.arg("plain"));
+
+    if (error) {
+        server.send(400, "application/json", "{\"ok\":false,\"error\":\"invalid_json\"}");
+        return;
+    }
+
+    if (doc["device_name"].is<String>()) {
+        appConfig.deviceName = doc["device_name"].as<String>();
+    }
+
+    sendOkConfig();
+}
+
 void handleUpdateRelayConfig() {
     DynamicJsonDocument doc(1024);
     DeserializationError error = deserializeJson(doc, server.arg("plain"));
@@ -616,6 +638,7 @@ void setup() {
     server.on("/relay/relay_2/off", HTTP_GET, handleGenericRelayRoute);
 
     server.on("/config", HTTP_GET, handleGetConfig);
+    server.on("/config/device", HTTP_POST, handleUpdateDeviceConfig);
     server.on("/config/relay", HTTP_POST, handleUpdateRelayConfig);
     server.on("/config/bms", HTTP_POST, handleUpdateBmsConfig);
     server.on("/config/temp", HTTP_POST, handleUpdateTempSensorConfig);