EdgePi ADC Node

EdgePi ADC node that reads voltage, differential, and RTD.

Details

Differential Types:

• DIFF1: Ports 16 & 17
• DIFF1: Ports 19 & 20
• DIFF1: Ports 21 & 22
• DIFF1: Ports 24 & 25

Assigned ports for RTD measurements:

• 21
• 24
• 25

NOTE: Port 22 will also be disabled.

Properties

• RPC Server:
  The connection to your EdgePi's RPC Server.
• Reading:
  The type of reading you want the ADC to do next.
• ADC:
  Which ADC you want to use for the next reading.
• ADC Channel (when configured to read voltage):
  Which analog channel you read from next.
• Data Rate (when configured to read voltage):
  The selected ADC's data rate. Note that data rates are different depending on which ADC you chose.
• Differential (when configured to read differential):
  The differential you want to read next.

Inputs

• payload (number)
  The input selection -- the channel number (1 to 8) or differential channels number (1 to 4) depending on the read type. Ignored for read type rtd.
• readType (string)
  single, diff, or rtd. Default is single.
• dataRate (number)
  ADC data rate. Valid values for ADC 1: [2.5, 5, 10, 16.6, 20, 50, 60, 100, 400, 1200, 2400, 4800, 7200, 14400, 19200, 38400] . Default is 38400. Valid values for ADC 2: [10, 100, 400, 800] . Default is 800.
• adc (number)
  ADC number to use for reads. Valid values are 1 and 2. Forced to 2 when RTD readType is rtd. Default is 1.

Outputs

• Read type single:
  • payload (number)
    Voltage reading of the specified single-ended analog input channel.
• Read type diff:
  • payload (number)
    Differential voltage reading of the specified differential channels.
• Read type rtd:
  • payload (number)
    RTD temperature reading in Celsius.