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Fix MCP3xxx Readme

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Dave Conway-Jones
2021-10-19 20:34:08 +01:00
parent 9b2ba970de
commit c78ac48fa5
3 changed files with 13 additions and 12 deletions
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hardware/mcp3008/pimcp3008.html
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@@ -48,16 +48,17 @@
</script>
<script type="text/html" data-help-name="pimcp3008">
<p>Reads from an MCP3xxx Series Analogue to Digital Converter (ADC) chip on the Pi SPI CE0 or CE1 connection,
such as the rasp.io/analogzero.</p>
<p>You can either set a channel in the edit dialogue, or you can set the <code>msg.payload</code>
to select the channel dynamically. If so then the expected payload must be a value from 0 to 7.</p>
<p>Outputs a numeric <code>msg.payload</code> with a range of 0 to 1023, representing 0V to 3.3V.</p>
<p><i>Hint</i>: use a <code>range</code> node to re-scale the values to ones you want.</p>
<p>Also sets <code>msg.topic</code> to <i>adc/{the pin number}</i></p>
<p><b>Warning</b>: Input voltages must not exceed 3.3V</p>
<p>The SPI bus must be enabled for this node to work. This can be achieved by using the
advanced menu (option 9 A5) of the <b>raspi-config</b> utility.</p>
<p>Reads from an MCP3xxx Series Analogue to Digital Converter (ADC) chip on the Pi SPI CE0 or CE1 connection,
such as the rasp.io/analogzero.</p>
<p>You can either set a channel in the edit dialogue, or you can set the <code>msg.payload</code>
to select the channel dynamically. If so then the expected payload must be a value from 0 to 7.</p>
<p>Outputs a numeric <code>msg.payload</code> with a range of 0 to 1023 for MCP30xx or 0 to 4095 for
MCP32xx and MPC33xx, representing 0V to 3.3V.</p>
<p><i>Hint</i>: use a <code>range</code> node to re-scale the values to ones you want.</p>
<p>Also sets <code>msg.topic</code> to <i>adc/{the pin number}</i></p>
<p><b>Warning</b>: Input voltages must not exceed 3.3V</p>
<p>The SPI bus must be enabled for this node to work. This can be achieved by using the
advanced menu (option 9 A5) of the <b>raspi-config</b> utility.</p>
</script>
<script type="text/javascript">