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NCD16Relay library doesn't turn on relays on the PR16-12 Board with Particle Electron #1

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alan707 opened this issue Dec 10, 2020 · 1 comment
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NCD16Relay library doesn't turn on relays on the PR16-12 Board with Particle Electron #1

alan707 opened this issue Dec 10, 2020 · 1 comment

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@alan707
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alan707 commented Dec 10, 2020

Steps to Reproduce:

  1. Disconnect all jumpers
  2. On build.particle.io, select the example loop-test.ino from the NCD16Relay library
  3. Select Photon attached to PR16-12 board
  4. Flash clicking on the lightning bolt

Expected failure:

Relays do not turn on or off

What I've tried to get Bank 1 to work

By modifying the registerAddress on the file NCD16Relay.cpp, I was able to get half of the bank of relays to turn on/off. The address that seemed to work was registerAddress = 0x0A, which doesn't seem to match the documentation for the MCP23017 IC.
@alan707
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alan707 commented Jan 12, 2021

Turned out it was a bad relay board - replacing it with a new one solved the issue.

@alan707 alan707 closed this as completed Jan 12, 2021
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