Wi-Fi radio frequency interference
Wireless devices such as microwave transmitters, wireless cameras, or a neighbor's Wi-Fi device can cause interference with Wi-Fi connections you use for connecting the equipment to the HMI. It can also occur if you have too many Wi-Fi devices.
Make sure you have a stable Wi-Fi connection by checking the following conditions:
- Check the mounting position of the transmitter/router. 
- Reposition other wireless devices around the equipment in question. 
- Boost the signal by adding antennas and/or Wi-Fi extenders to increase the range. 
- Add a second Wi-Fi router.