From d8fe676c657c871efe97a0ca67fbccddf05878dc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Cl=C3=A9ment=20Martin?= <twisla@twis.la>
Date: Fri, 2 Oct 2026 14:32:35 +0200
Subject: [PATCH] Add Wi-Fi/TLS heap probe; limit deep+ LDF to native tests

The deep+ dependency finder broke the framework's WiFi -> Network
include on the device build; only the native test env needs it.
The probe serial command (probe <ssid>TAB<password>) measures heap
with Wi-Fi connected and one TLS connection; credentials never touch
the repo.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT
---
 platformio.ini |  2 +-
 src/main.cpp   | 41 +++++++++++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/platformio.ini b/platformio.ini
index fbd0c01..955384d 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -7,7 +7,6 @@ default_envs = cardputer-adv
 [env]
 extra_scripts = pre:scripts/version.py
 test_framework = unity
-lib_ldf_mode = deep+
 
 [env:cardputer-adv]
 platform = https://github.com/pioarduino/platform-espressif32/releases/download/55.03.312/platform-espressif32.zip
@@ -25,4 +24,5 @@ test_ignore = *
 ; Host-side unit tests for pure logic (no hardware).
 [env:native]
 platform = native
+lib_ldf_mode = deep+
 build_flags = -std=gnu++17
diff --git a/src/main.cpp b/src/main.cpp
index 0c67698..681c85c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,5 +1,7 @@
 // roro9stack firmware entry point: wires Services, Apps and the UI loop together.
 #include <M5Cardputer.h>
+#include <NetworkClientSecure.h>
+#include <WiFi.h>
 
 #include "app_manager.h"
 #include "apps/demo_app.h"
@@ -101,6 +103,41 @@ void setup() {
     Serial.printf("%s %s ready, free heap %u\n", kProductName, versionString(), ESP.getFreeHeap());
 }
 
+// Dev aid (M1 step 1): heap cost of Wi-Fi and one TLS connection. Credentials come over serial only.
+static void memoryProbe(const String& ssid, const String& pass) {
+    auto heap = [](const char* stage) {
+        Serial.printf("probe %-18s heap %6u  min %6u  largest block %6u\n", stage, ESP.getFreeHeap(),
+                      ESP.getMinFreeHeap(), heap_caps_get_largest_free_block(MALLOC_CAP_8BIT));
+    };
+    heap("before wifi");
+    WiFi.mode(WIFI_STA);
+    WiFi.begin(ssid.c_str(), pass.c_str());
+    uint32_t start = millis();
+    while (WiFi.status() != WL_CONNECTED && millis() - start < 20000) delay(100);
+    if (WiFi.status() != WL_CONNECTED) {
+        Serial.printf("probe wifi failed, status %d\n", WiFi.status());
+        heap("wifi failed");
+        WiFi.disconnect(true);
+        return;
+    }
+    Serial.printf("probe wifi connected, rssi %d, ip %s\n", WiFi.RSSI(), WiFi.localIP().toString().c_str());
+    heap("wifi connected");
+    {
+        NetworkClientSecure tls;
+        tls.setInsecure();  // measurement only; M1 verifies certificates
+        if (tls.connect("irc.libera.chat", 6697)) {
+            heap("tls connected");
+            tls.stop();
+        } else {
+            Serial.println("probe tls connect failed");
+        }
+    }
+    heap("tls closed");
+    WiFi.disconnect(true);
+    WiFi.mode(WIFI_OFF);
+    heap("wifi off");
+}
+
 // Dev aid: serial commands to drive the UI without the keyboard.
 static void serialCommands() {
     static String line;
@@ -120,6 +157,10 @@ static void serialCommands() {
                     : k == "right" ? Key::Right : k == "back" ? Key::Back : k == "home" ? Key::Home : Key::Select;
             if (!power->onKey(millis())) apps->handleKey(KeyEvent::of(key));
         }
+        if (line.startsWith("probe ")) {  // probe <ssid>\t<password>
+            int tab = line.indexOf('\t');
+            if (tab > 0) memoryProbe(line.substring(6, tab), line.substring(tab + 1));
+        }
         if (line == "sound off") settings.setBool(Setting::Sound, false);
         if (line == "sound on") settings.setBool(Setting::Sound, true);
         if (line == "short") {