diff --git a/Software/components/core/src/AudioProfileJson.cpp b/Software/components/core/src/AudioProfileJson.cpp
index 3edcb72..89e3511 100644
--- a/Software/components/core/src/AudioProfileJson.cpp
+++ b/Software/components/core/src/AudioProfileJson.cpp
@@ -58,15 +58,24 @@ namespace {
                                    std::string_view key,
                                    bool& out)
 {
-    const std::string trueNeedle =
-        std::string("\"") + std::string(key) + "\":true";
-    const std::string falseNeedle =
-        std::string("\"") + std::string(key) + "\":false";
-    if (json.find(trueNeedle) != std::string_view::npos) {
+    const std::string needle =
+        std::string("\"") + std::string(key) + "\":";
+    const std::size_t needlePos = json.find(needle);
+    if (needlePos == std::string_view::npos) {
+        return false;
+    }
+    std::size_t start = needlePos + needle.size();
+    while (start < json.size()
+           && (json[start] == ' ' || json[start] == '\t'
+               || json[start] == '\r' || json[start] == '\n')) {
+        ++start;
+    }
+    const std::string_view rest = json.substr(start);
+    if (rest.starts_with("true")) {
         out = true;
         return true;
     }
-    if (json.find(falseNeedle) != std::string_view::npos) {
+    if (rest.starts_with("false")) {
         out = false;
         return true;
     }
diff --git a/Software/components/core/src/BluetoothJson.cpp b/Software/components/core/src/BluetoothJson.cpp
index a126130..4f53950 100644
--- a/Software/components/core/src/BluetoothJson.cpp
+++ b/Software/components/core/src/BluetoothJson.cpp
@@ -150,12 +150,21 @@ parseBluetoothConnectJson(std::string_view json)
     if (json.find('{') == std::string_view::npos) {
         return std::unexpected(ParseError::InvalidJson);
     }
-    const std::string needle = "\"mac\":\"";
-    const std::size_t start = json.find(needle);
-    if (start == std::string_view::npos) {
+    const std::string needle = "\"mac\":";
+    const std::size_t needlePos = json.find(needle);
+    if (needlePos == std::string_view::npos) {
         return std::unexpected(ParseError::MissingField);
     }
-    const std::size_t valueStart = start + needle.size();
+    std::size_t start = needlePos + needle.size();
+    while (start < json.size()
+           && (json[start] == ' ' || json[start] == '\t'
+               || json[start] == '\r' || json[start] == '\n')) {
+        ++start;
+    }
+    if (start >= json.size() || json[start] != '"') {
+        return std::unexpected(ParseError::InvalidJson);
+    }
+    const std::size_t valueStart = start + 1U;
     const std::size_t valueEnd = json.find('"', valueStart);
     if (valueEnd == std::string_view::npos) {
         return std::unexpected(ParseError::InvalidJson);
@@ -183,17 +192,35 @@ BluetoothConnectRequest parseBluetoothConnectRequest(std::string_view json)
     if (auto mac = parseBluetoothConnectJson(json); mac) {
         request.mac = std::move(*mac);
     }
-    const std::string nameNeedle = "\"name\":\"";
-    const std::size_t nameStart = json.find(nameNeedle);
-    if (nameStart != std::string_view::npos) {
-        const std::size_t valueStart = nameStart + nameNeedle.size();
-        const std::size_t valueEnd = json.find('"', valueStart);
-        if (valueEnd != std::string_view::npos) {
-            request.name.assign(json.substr(valueStart, valueEnd - valueStart));
+    const std::string nameNeedle = "\"name\":";
+    const std::size_t nameNeedlePos = json.find(nameNeedle);
+    if (nameNeedlePos != std::string_view::npos) {
+        std::size_t nameStart = nameNeedlePos + nameNeedle.size();
+        while (nameStart < json.size()
+               && (json[nameStart] == ' ' || json[nameStart] == '\t'
+                   || json[nameStart] == '\r' || json[nameStart] == '\n')) {
+            ++nameStart;
+        }
+        if (nameStart < json.size() && json[nameStart] == '"') {
+            const std::size_t valueStart = nameStart + 1U;
+            const std::size_t valueEnd = json.find('"', valueStart);
+            if (valueEnd != std::string_view::npos) {
+                request.name.assign(
+                    json.substr(valueStart, valueEnd - valueStart));
+            }
         }
     }
-    request.save = json.find("\"save\":true") != std::string_view::npos
-                   || json.find("\"save\": true") != std::string_view::npos;
+    const std::string saveNeedle = "\"save\":";
+    const std::size_t saveNeedlePos = json.find(saveNeedle);
+    if (saveNeedlePos != std::string_view::npos) {
+        std::size_t saveStart = saveNeedlePos + saveNeedle.size();
+        while (saveStart < json.size()
+               && (json[saveStart] == ' ' || json[saveStart] == '\t'
+                   || json[saveStart] == '\r' || json[saveStart] == '\n')) {
+            ++saveStart;
+        }
+        request.save = json.substr(saveStart).starts_with("true");
+    }
     return request;
 }
 
@@ -219,13 +246,22 @@ parseBluetoothSpeakerJson(std::string_view json)
         return std::unexpected(mac.error());
     }
     BtSpeakerTarget target{.mac = *mac, .name = {}};
-    const std::string nameNeedle = "\"name\":\"";
-    const std::size_t nameStart = json.find(nameNeedle);
-    if (nameStart != std::string_view::npos) {
-        const std::size_t valueStart = nameStart + nameNeedle.size();
-        const std::size_t valueEnd = json.find('"', valueStart);
-        if (valueEnd != std::string_view::npos) {
-            target.name.assign(json.substr(valueStart, valueEnd - valueStart));
+    const std::string nameNeedle = "\"name\":";
+    const std::size_t nameNeedlePos = json.find(nameNeedle);
+    if (nameNeedlePos != std::string_view::npos) {
+        std::size_t nameStart = nameNeedlePos + nameNeedle.size();
+        while (nameStart < json.size()
+               && (json[nameStart] == ' ' || json[nameStart] == '\t'
+                   || json[nameStart] == '\r' || json[nameStart] == '\n')) {
+            ++nameStart;
+        }
+        if (nameStart < json.size() && json[nameStart] == '"') {
+            const std::size_t valueStart = nameStart + 1U;
+            const std::size_t valueEnd = json.find('"', valueStart);
+            if (valueEnd != std::string_view::npos) {
+                target.name.assign(
+                    json.substr(valueStart, valueEnd - valueStart));
+            }
         }
     }
     return target;
diff --git a/Software/components/core/src/DspParamJson.cpp b/Software/components/core/src/DspParamJson.cpp
index 4868f6c..00be98e 100644
--- a/Software/components/core/src/DspParamJson.cpp
+++ b/Software/components/core/src/DspParamJson.cpp
@@ -24,12 +24,21 @@ namespace {
                                                   std::string_view key)
 {
     const std::string needle =
-        std::string("\"") + std::string(key) + "\":\"";
-    const std::size_t start = json.find(needle);
-    if (start == std::string_view::npos) {
+        std::string("\"") + std::string(key) + "\":";
+    const std::size_t needlePos = json.find(needle);
+    if (needlePos == std::string_view::npos) {
         return {};
     }
-    const std::size_t valueStart = start + needle.size();
+    std::size_t start = needlePos + needle.size();
+    while (start < json.size()
+           && (json[start] == ' ' || json[start] == '\t'
+               || json[start] == '\r' || json[start] == '\n')) {
+        ++start;
+    }
+    if (start >= json.size() || json[start] != '"') {
+        return {};
+    }
+    const std::size_t valueStart = start + 1U;
     const std::size_t valueEnd = json.find('"', valueStart);
     if (valueEnd == std::string_view::npos) {
         return {};
diff --git a/Software/components/core/src/StationListJson.cpp b/Software/components/core/src/StationListJson.cpp
index a46287c..faba0fc 100644
--- a/Software/components/core/src/StationListJson.cpp
+++ b/Software/components/core/src/StationListJson.cpp
@@ -24,12 +24,21 @@ namespace {
                                                  std::string_view key)
 {
     const std::string needle =
-        std::string("\"") + std::string(key) + "\":\"";
-    const std::size_t start = json.find(needle);
-    if (start == std::string_view::npos) {
+        std::string("\"") + std::string(key) + "\":";
+    const std::size_t needlePos = json.find(needle);
+    if (needlePos == std::string_view::npos) {
         return {};
     }
-    const std::size_t valueStart = start + needle.size();
+    std::size_t start = needlePos + needle.size();
+    while (start < json.size()
+           && (json[start] == ' ' || json[start] == '\t'
+               || json[start] == '\r' || json[start] == '\n')) {
+        ++start;
+    }
+    if (start >= json.size() || json[start] != '"') {
+        return {};
+    }
+    const std::size_t valueStart = start + 1U;
     const std::size_t valueEnd = json.find('"', valueStart);
     if (valueEnd == std::string_view::npos) {
         return {};
diff --git a/Software/components/core/src/TunerJson.cpp b/Software/components/core/src/TunerJson.cpp
index 84297ad..b69e1fc 100644
--- a/Software/components/core/src/TunerJson.cpp
+++ b/Software/components/core/src/TunerJson.cpp
@@ -24,12 +24,21 @@ namespace {
                                                  std::string_view key)
 {
     const std::string needle =
-        std::string("\"") + std::string(key) + "\":\"";
-    const std::size_t start = json.find(needle);
-    if (start == std::string_view::npos) {
+        std::string("\"") + std::string(key) + "\":";
+    const std::size_t needlePos = json.find(needle);
+    if (needlePos == std::string_view::npos) {
         return {};
     }
-    const std::size_t valueStart = start + needle.size();
+    std::size_t start = needlePos + needle.size();
+    while (start < json.size()
+           && (json[start] == ' ' || json[start] == '\t'
+               || json[start] == '\r' || json[start] == '\n')) {
+        ++start;
+    }
+    if (start >= json.size() || json[start] != '"') {
+        return {};
+    }
+    const std::size_t valueStart = start + 1U;
     const std::size_t valueEnd = json.find('"', valueStart);
     if (valueEnd == std::string_view::npos) {
         return {};
diff --git a/Software/components/core/src/WebRadioJson.cpp b/Software/components/core/src/WebRadioJson.cpp
index fee4b2f..5f4c870 100644
--- a/Software/components/core/src/WebRadioJson.cpp
+++ b/Software/components/core/src/WebRadioJson.cpp
@@ -24,12 +24,21 @@ constexpr std::string_view kHttpPrefix = "http://";
                                                   std::string_view key)
 {
     const std::string needle =
-        std::string("\"") + std::string(key) + "\":\"";
-    const std::size_t start = json.find(needle);
-    if (start == std::string_view::npos) {
+        std::string("\"") + std::string(key) + "\":";
+    const std::size_t needlePos = json.find(needle);
+    if (needlePos == std::string_view::npos) {
         return {};
     }
-    const std::size_t valueStart = start + needle.size();
+    std::size_t start = needlePos + needle.size();
+    while (start < json.size()
+           && (json[start] == ' ' || json[start] == '\t'
+               || json[start] == '\r' || json[start] == '\n')) {
+        ++start;
+    }
+    if (start >= json.size() || json[start] != '"') {
+        return {};
+    }
+    const std::size_t valueStart = start + 1U;
     const std::size_t valueEnd = json.find('"', valueStart);
     if (valueEnd == std::string_view::npos) {
         return {};
@@ -40,15 +49,24 @@ constexpr std::string_view kHttpPrefix = "http://";
 [[nodiscard]] bool extractJsonBool(std::string_view json,
                                    std::string_view key, bool& out)
 {
-    const std::string trueNeedle =
-        std::string("\"") + std::string(key) + "\":true";
-    const std::string falseNeedle =
-        std::string("\"") + std::string(key) + "\":false";
-    if (json.find(trueNeedle) != std::string_view::npos) {
+    const std::string needle =
+        std::string("\"") + std::string(key) + "\":";
+    const std::size_t needlePos = json.find(needle);
+    if (needlePos == std::string_view::npos) {
+        return false;
+    }
+    std::size_t start = needlePos + needle.size();
+    while (start < json.size()
+           && (json[start] == ' ' || json[start] == '\t'
+               || json[start] == '\r' || json[start] == '\n')) {
+        ++start;
+    }
+    const std::string_view rest = json.substr(start);
+    if (rest.starts_with("true")) {
         out = true;
         return true;
     }
-    if (json.find(falseNeedle) != std::string_view::npos) {
+    if (rest.starts_with("false")) {
         out = false;
         return true;
     }
diff --git a/Software/components/core/src/WifiProvisionJson.cpp b/Software/components/core/src/WifiProvisionJson.cpp
index f3590e0..1739dc9 100644
--- a/Software/components/core/src/WifiProvisionJson.cpp
+++ b/Software/components/core/src/WifiProvisionJson.cpp
@@ -37,12 +37,21 @@ namespace {
 [[nodiscard]] std::string_view extractJsonString(std::string_view json,
                                                  std::string_view key)
 {
-    const std::string needle = std::string("\"") + std::string(key) + "\":\"";
-    const std::size_t start = json.find(needle);
-    if (start == std::string_view::npos) {
+    const std::string needle = std::string("\"") + std::string(key) + "\":";
+    const std::size_t needlePos = json.find(needle);
+    if (needlePos == std::string_view::npos) {
         return {};
     }
-    const std::size_t valueStart = start + needle.size();
+    std::size_t start = needlePos + needle.size();
+    while (start < json.size()
+           && (json[start] == ' ' || json[start] == '\t'
+               || json[start] == '\r' || json[start] == '\n')) {
+        ++start;
+    }
+    if (start >= json.size() || json[start] != '"') {
+        return {};
+    }
+    const std::size_t valueStart = start + 1U;
     const std::size_t valueEnd = json.find('"', valueStart);
     if (valueEnd == std::string_view::npos) {
         return {};
diff --git a/Software/components/secure_store/src/NvsAudioProfileStore.cpp b/Software/components/secure_store/src/NvsAudioProfileStore.cpp
index 01c2b5a..9cacbea 100644
--- a/Software/components/secure_store/src/NvsAudioProfileStore.cpp
+++ b/Software/components/secure_store/src/NvsAudioProfileStore.cpp
@@ -26,7 +26,12 @@ namespace secure_store {
 namespace {
 constexpr char kTag[] = "NvsAudioProfileStore";
 constexpr char kNamespace[] = "digiradio";
-constexpr char kProfileKey[] = "audio_profile_json";
+// NVS key names are capped at 15 chars (NVS_KEY_NAME_MAX_SIZE=16 incl. NUL);
+// the previous "audio_profile_json" (18 chars) made every nvs_set_str call
+// fail with ESP_ERR_NVS_KEY_TOO_LONG (0x1109), silently -- applyProfile()
+// always updated live audio correctly but persistProfile() never actually
+// wrote anything, so nothing survived a reboot.
+constexpr char kProfileKey[] = "audio_profile";
 } // namespace
 
 bool NvsAudioProfileStore::hasProfile() const