<?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[UnitV2 uart function switched to motion_tracker.]]></title><description><![CDATA[<p dir="auto">How do I send a command to the UnitV2 to start motion_tracker?<br />
Are there examples of this somewhere?</p>
<p dir="auto">Yes here:<br />
<a href="https://docs.m5stack.com/en/quick_start/unitv2/base_functions" target="_blank" rel="noopener noreferrer nofollow ugc">1.2 Serial Operation</a></p>
<p dir="auto">{<br />
"function": "Camera Stream",<br />
"args": ""<br />
}</p>
<p dir="auto">BUT Returns this</p>
<p dir="auto">{"error":"invalid json format."}<br />
{"error":"invalid json format."}<br />
{"error":"Command is not supported"}<br />
{"error":"invalid json format."}<br />
{"error":"invalid json format."}</p>
<p dir="auto">Can anyone help with this problem I have ?  Please<br />
{"error":"invalid json format."}</p>
<p dir="auto">OR<br />
if I send it this way</p>
<p dir="auto">{"function":"Motion Tracker","args":""}</p>
<p dir="auto">I get No response and no change to the mode.  so it fails also. Just ignores the string no reaction.  2 Days in</p>
]]></description><link>https://community.m5stack.com/topic/4873/unitv2-uart-function-switched-to-motion_tracker</link><generator>RSS for Node</generator><lastBuildDate>Wed, 29 Apr 2026 08:47:06 GMT</lastBuildDate><atom:link href="https://community.m5stack.com/topic/4873.rss" rel="self" type="application/rss+xml"/><pubDate>Thu, 08 Dec 2022 21:40:06 GMT</pubDate><ttl>60</ttl></channel></rss>