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Fix MCP3xxx Readme

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Dave Conway-Jones 2021-10-19 20:34:08 +01:00
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2
hardware/mcp3008/README.md
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@ -39,7 +39,7 @@ You can also select device id 0 or 1 (CE0 or CE1) depending on how you have wire
And you can also select the SPI bus number 0 or 1 depending on how you have wired up your device. Defaults to 0 for spidev0.
Outputs a numeric `msg.payload` with a range of 0 to 1023, where 0 = 0V and 1023 = 3.3V (assuming you use the default 3.3V voltage reference).
Outputs a numeric `msg.payload` with a range of 0 to 1023 for MCP30XX family, where 0 = 0V and 1023 = 3.3V (assuming you use the default 3.3V voltage reference). For MCP32XX and MCP33XX the range returned is 0 to 4095.
**Hint**: use a `range` node to adjust the values to the range you want.

2
hardware/mcp3008/package.json
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@ -1,6 +1,6 @@
{
"name" : "node-red-node-pi-mcp3008",
"version" : "0.4.0",
"version" : "0.4.2",
"description" : "A Node-RED node to read from the MCP3008 Analogue to Digital Converter",
"dependencies" : {
"mcp-spi-adc": "^3.2.0"

21
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">