<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[Fatal crash on sta.scan() in UIFlow2 v2.4.4 on Tab5 - firmware bug]]></title><description><![CDATA[<p dir="auto">Hey everyone,</p>
<p dir="auto">Yesterday I got my M5Stack Tab5 and started building a wardriving app in UIFlow2 MicroPython. During development I discovered that calling <strong>sta.scan()</strong> causes a fatal <strong>Guru Meditation Error</strong> every single time, crashing and rebooting the device.</p>
<p dir="auto">After extensive testing I can confirm:</p>
<ul>
<li>The crash is 100% reproducible - every scan attempt crashes</li>
<li>The same crash address (<strong>MEPC: 0x4ff13582</strong>) appears every single time</li>
<li>It happens regardless of code complexity, UI framework, scan interval or WiFi credentials</li>
<li>It cannot be caught by Python exception handling - it crashes below the MicroPython VM</li>
<li>Register analysis points to a null pointer dereference in the <strong>esp-hosted</strong> SDIO transport layer after an <strong>ETIMEDOUT</strong> on the ESP32-C6 coprocessor</li>
</ul>
<p dir="auto">I've filed a detailed bug report on GitHub including a minimal reproducer, crash dump analysis and probable root cause:</p>
<p dir="auto">👉 <a href="https://github.com/m5stack/uiflow-micropython/issues/94" target="_blank" rel="noopener noreferrer nofollow ugc">https://github.com/m5stack/uiflow-micropython/issues/94</a></p>
<p dir="auto">Has anyone else hit this on their Tab5? Any confirmations would help strengthen the case for a fix!</p>
]]></description><link>https://community.m5stack.com/topic/8214/fatal-crash-on-sta.scan-in-uiflow2-v2.4.4-on-tab5-firmware-bug</link><generator>RSS for Node</generator><lastBuildDate>Mon, 11 May 2026 23:13:59 GMT</lastBuildDate><atom:link href="https://community.m5stack.com/topic/8214.rss" rel="self" type="application/rss+xml"/><pubDate>Sun, 10 May 2026 06:27:14 GMT</pubDate><ttl>60</ttl></channel></rss>