@bhansen Modbus does not support discovery, so you need to know the slave address, register address, type and format to be able to map data points.

This reference on the Mango site may help : http://docs-v4.mango-os.com/modbus-point-list-requirements

I'm not able to replicate this issue with the BACnet IP devices I have on my test bench, but based on the error message I think you may need to install the fontconfig package. Log into the unit locally or via SSH (port 2222) and run the following command:

sudo apt-get install fontconfig

Hmm, then I would suggest setting it in the /etc/network/interfaces file. Download an SSH client like PuTTY and connect to:

mango@[currentIpAddress]
Port 2222

Your unique SSH password would have been included on a sticker in the MangoGT box. If you need us to look it up, please send the serial number of the MangoGT to support@infiniteautomation.com. Use the following command to edit the file:

sudo nano /etc/network/interfaces

Then change this line:

iface eth0 inet dhcp

To be like this:

iface eth0 inet static
address x.x.x.x
netmask x.x.x.x
gateway x.x.x.x
dns-nameservers x.x.x.x

Ctrl+x, y, Enter to save. Then sudo reboot to restart the unit with the new static network settings. Gateway and DNS servers are optional if you don't need them.