diff --git a/sonde/sonde.brd b/sonde/sonde.brd
--- a/sonde/sonde.brd
+++ b/sonde/sonde.brd
@@ -23,7 +23,7 @@
 <layer number="13" name="Route13" color="4" fill="5" visible="no" active="no"/>
 <layer number="14" name="Route14" color="1" fill="6" visible="no" active="no"/>
 <layer number="15" name="Route15" color="4" fill="6" visible="no" active="no"/>
-<layer number="16" name="Bottom" color="1" fill="1" visible="no" active="yes"/>
+<layer number="16" name="Bottom" color="1" fill="1" visible="yes" active="yes"/>
 <layer number="17" name="Pads" color="2" fill="1" visible="yes" active="yes"/>
 <layer number="18" name="Vias" color="2" fill="1" visible="yes" active="yes"/>
 <layer number="19" name="Unrouted" color="6" fill="1" visible="no" active="yes"/>
@@ -232,7 +232,6 @@
 <circle x="17.541875" y="14.9225" radius="0.079375" width="0.4064" layer="21"/>
 <circle x="9.001125" y="17.573625" radius="0.079375" width="0.4064" layer="21"/>
 <text x="8.9535" y="6.619875" size="0.762" layer="29" font="vector" ratio="16" rot="SR270">sonde02</text>
-<circle x="18.970625" y="3.540125" radius="0.079375" width="0.4064" layer="21"/>
 <text x="8.9535" y="14.4145" size="0.8128" layer="29" font="vector" ratio="16" rot="SR270">protofusion</text>
 <text x="13.160375" y="7.1755" size="0.8128" layer="22" font="vector" ratio="16" rot="MR270">-</text>
 <wire x1="13.573125" y1="21.55825" x2="9.001125" y2="21.55825" width="0" layer="56"/>
@@ -1012,6 +1011,49 @@ Source: http://www.osram.convergy.de/ ..
 </package>
 </packages>
 </library>
+<library name="SLAT-MicroProc">
+<description>SLAT Microprocessors</description>
+<packages>
+<package name="UFQFPN28">
+<wire x1="-2.146" y1="2.146" x2="2.154" y2="2.146" width="0.2032" layer="51"/>
+<wire x1="2.154" y1="2.146" x2="2.154" y2="-2.154" width="0.2032" layer="51"/>
+<wire x1="2.154" y1="-2.154" x2="-2.146" y2="-2.154" width="0.2032" layer="51"/>
+<wire x1="-2.146" y1="-2.154" x2="-2.146" y2="2.146" width="0.2032" layer="51"/>
+<smd name="1" x="-2.096" y="1.496" dx="0.7" dy="0.3" layer="1"/>
+<smd name="2" x="-2.096" y="0.996" dx="0.7" dy="0.3" layer="1" roundness="100"/>
+<smd name="3" x="-2.096" y="0.496" dx="0.7" dy="0.3" layer="1" roundness="100"/>
+<smd name="4" x="-2.096" y="-0.004" dx="0.7" dy="0.3" layer="1" roundness="100"/>
+<smd name="5" x="-2.096" y="-0.504" dx="0.7" dy="0.3" layer="1" roundness="100"/>
+<smd name="6" x="-2.096" y="-1.004" dx="0.7" dy="0.3" layer="1" roundness="100"/>
+<smd name="7" x="-2.096" y="-1.504" dx="0.7" dy="0.3" layer="1" roundness="100"/>
+<smd name="8" x="-1.496" y="-2.104" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R90"/>
+<smd name="9" x="-0.996" y="-2.104" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R90"/>
+<smd name="10" x="-0.496" y="-2.104" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R90"/>
+<smd name="11" x="0.004" y="-2.104" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R90"/>
+<smd name="12" x="0.504" y="-2.104" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R90"/>
+<smd name="13" x="1.004" y="-2.104" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R90"/>
+<smd name="14" x="1.504" y="-2.104" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R90"/>
+<smd name="15" x="2.104" y="-1.504" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R180"/>
+<smd name="16" x="2.104" y="-1.004" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R180"/>
+<smd name="17" x="2.104" y="-0.504" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R180"/>
+<smd name="18" x="2.104" y="-0.004" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R180"/>
+<smd name="19" x="2.104" y="0.496" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R180"/>
+<smd name="20" x="2.104" y="0.996" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R180"/>
+<smd name="21" x="2.104" y="1.496" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R180"/>
+<smd name="22" x="1.504" y="2.096" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R270"/>
+<smd name="23" x="1.004" y="2.096" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R270"/>
+<smd name="24" x="0.504" y="2.096" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R270"/>
+<smd name="25" x="0.004" y="2.096" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R270"/>
+<smd name="26" x="-0.496" y="2.096" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R270"/>
+<smd name="27" x="-0.996" y="2.096" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R270"/>
+<smd name="28" x="-1.496" y="2.096" dx="0.7" dy="0.3" layer="1" roundness="100" rot="R270"/>
+<rectangle x1="-2.196" y1="1.746" x2="-1.746" y2="2.196" layer="21"/>
+<rectangle x1="-2.196" y1="0" x2="0" y2="2.196" layer="51"/>
+<text x="-1.778" y="2.54" size="0.8128" layer="25" font="vector" ratio="16">&gt;NAME</text>
+<text x="-2.286" y="-3.556" size="0.8128" layer="27" font="vector" ratio="16">&gt;VALUE</text>
+</package>
+</packages>
+</library>
 </libraries>
 <attributes>
 </attributes>
@@ -1348,6 +1390,7 @@ Please make sure your boards conform to 
 <attribute name="PROD_ID" value="IC-13090" x="21.463" y="7.747" size="1.778" layer="27" font="vector" rot="R90" display="off"/>
 </element>
 <element name="C10" library="Protofusion-passives" package="0402-CAP" value="0.1uF" x="26.797" y="12.954" rot="R90"/>
+<element name="U5" library="SLAT-MicroProc" package="UFQFPN28" value="STM32F031G6U6" x="-17.272" y="-2.794"/>
 </elements>
 <signals>
 <signal name="GND">
@@ -1399,7 +1442,7 @@ Please make sure your boards conform to 
 <via x="18.6055" y="20.558125" extent="1-16" drill="0.3302"/>
 <via x="10.541" y="10.842625" extent="1-16" drill="0.3302"/>
 <wire x1="12.993125" y1="18.368075" x2="12.307925" y2="18.368075" width="0.2032" layer="1"/>
-<via x="17.018" y="2.286" extent="1-16" drill="0.508" alwaysstop="yes"/>
+<via x="17.018" y="3.048" extent="1-16" drill="0.508" alwaysstop="yes"/>
 <via x="19.097625" y="6.429375" extent="1-16" drill="0.3302"/>
 <via x="15.541625" y="7.127875" extent="1-16" drill="0.3302"/>
 <via x="15.541625" y="5.730875" extent="1-16" drill="0.3302"/>