Without connecting the chip:

$ meadow listen

Connecting to Meadow on /dev/ttyACM0

An unknown request value of '0x4D00' was received.
Listening for Meadow Console output. Press Ctrl+C to exit
Meadow StdOut: Device is configured to use WiFi for the network interface
Meadow StdOut: Update Service is disabled.
Meadow StdOut: Initialize...
Meadow StdOut: App Error in App Initialize: Communication error.  Verify address and that SCL and SDA are not reversed.
Meadow StdOut: Meadow.NativeException: Communication error.  Verify address and that SCL and SDA are not reversed.
Meadow StdOut: at Meadow.Hardware.I2cBus.DecipherI2CError (Meadow.Core.Interop+Nuttx+ErrorCode ec) [0x00025] in <02ba49505aff4760aec9aa911fa216b8>:0
Meadow StdOut: at Meadow.Hardware.I2cBus.Exchange (System.Byte peripheralAddress, System.Span`1[T] writeBuffer, System.Span`1[T] readBuffer) [0x00096] in <02ba49505aff4760aec9aa911fa216b8>:0
Meadow StdOut: at Meadow.Hardware.I2cCommunications.ReadRegister (System.Byte ad
Meadow StdOut: ress, System.Span`1[T] readBuffer) [0x0003d] in <164cad39ddd349bcbe17b2ebcfddd2e0>:0
Meadow StdOut: at Meadow.Foundation.Sensors.Atmospheric.Bme280.ReadCompensationData () [0x00021] in <ac85cb30e591468180f0ef79362366e4>:0
Meadow StdOut: at Meadow.Foundation.Sensors.Atmospheric.Bme280.Initialize () [0x00000] in <ac85cb30e591468180f0ef79362366e4>:0
Meadow StdOut: at Meadow.Foundation.Sensors.Atmospheric.Bme280..ctor (
Meadow StdOut: eadow.Hardware.II2cBus i2cBus, System.Byte address) [0x000c8] in <ac85cb30e591468180f0ef79362366e4>:0
Meadow StdOut: at MeadowApp.MeadowApp.Initialize () [0x00021] in <dcd7043cd075450d82f730fb378bc43f>:0
Meadow StdOut: at Meadow.MeadowOS.Start (System.String[] args, Meadow.IApp app) [0x00098] in <3099356e20a447dfb5e0917f6484795c>:0

Connecting the BMP280:

$ meadow listen

Connecting to Meadow on /dev/ttyACM0

Meadow StdOut: Device is configured to use WiFi for the network interface
Meadow StdOut: Update Service is disabled.
Meadow StdOut: Initialize...
Meadow StdOut: Run...
Meadow StdOut: 0
Meadow StdOut: 0
Meadow StdOut: 0
Meadow StdOut: 0
Meadow StdOut: 0
Meadow StdOut: 0
Meadow StdOut: 0
Meadow StdOut: 0
Meadow StdOut: 0
Meadow StdOut: 0
Meadow StdOut: 0
Meadow StdOut: 11.7464154501683
Meadow StdOut: 11.7464154501683
Meadow StdOut: 11.7464154501683
Meadow StdOut: 11.7464154501683
Meadow StdOut: 11.7464154501683