This example is based on our basic example and shows how to use an String
query parameter, e.g. http://192.168.1.112/api/test?param=abc123
server.on("/api/test", HTTP_GET, [](AsyncWebServerRequest *request) { String param = request->getParam("param")->value(); // TODO: Do something with param! // Respond with JSON {"status": "ok"} AsyncResponseStream *response = request->beginResponseStream("application/json"); DynamicJsonDocument json(1024); json["status"] = "ok"; json["param"] = param; serializeJson(json, *response); request->send(response); });