BMP388 on I2C Bus

[carango]

Hello,

I am trying to connect a BMP388 sensor on the I2C bus in OpenPlotter 4 and send its values to Signal K, but I am stuck.
System

• OpenPlotter 4
  
• I2C app version 4.2.0
  
• Signal K up to date
  
• BMP388 connected on I2C
  
• Sensor detected at address 0x77
  

What I already verified

So the BMP388 seems to be visible on the I2C bus at 0x77.

I2C app configuration

In the OpenPlotter I2C app, I configured the sensor as BMP3XX with:

• address: 0x77
  
• channel: pressure
  
• Signal K key: environment.inside.pressure
  
• rate: 1.0
  

and also:

• address: 0x77
  
• channel: temperature
  
• Signal K key: environment.inside.temperature
  
• rate: 1.0
  

Problem

In Signal K, I do not get actual values.
The data browser only shows:



“No data available. Waiting for data…”


So I am unsure whether:

1. BMP3XX support is currently broken or incomplete in OpenPlotter 4 / I2C 4.2.0
   
2. there is an additional step required to publish the sensor data to Signal K
   
3. the BMP388 should be configured differently
   
4. the environment.inside.temperature / environment.inside.pressure keys are correct for this use case
   

Additional background

At one point I had an old i2c-reader package in Signal K that failed with:

“Failed to start: Could not locate the bindings file…”

That package has now been removed, so I am trying to use only the native OpenPlotter I2C app path.

My questions

• Is BMP388 / BMP3XX expected to work in OpenPlotter 4 I2C 4.2.0?
  
• Is there a missing step to get the values into Signal K?
  
• Is there any known issue with BMP3XX on OpenPlotter 4?
  
• Should I test another sensor type or another Signal K key mapping?
  

Any help would be appreciated. Thanks a lot.
georg
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