If your JOAN devices are not performing optimally when it comes to battery life, you should first check your Wi-Fi network setup. The most probable reasons for excessive battery drainage are:
- Bad network coverage: Please check your network coverage. A bad signal will cause delays in JOAN's responding to a touchscreen command and will also cause faster battery drain.
- AP Roaming: Is it possible that your devices roam between multiple APs (sharing the same SSID)? Due to using a low power Wi-Fi module, APs could transfer JOAN from one to another in an uncontrollable fashion. This would result in faster battery drainage due to disconnects and reconnects shortening battery life.
- DTIM & Beacon settings of your AP: What are the DTIM and Beacon intervals? This is one of the important factors of a Wi-Fi network when it comes to power saving modes.
To have the best user experience with JOAN, it is also best to connect your device to the closest server, so that minimum network latency is achieved.
There are a few additional things you can do to ensure JOAN's battery will last longer. Read about them here.
As you probably know, JOAN devices are thin client devices and that are really power efficient. To achieve that efficiency, they are almost always in a very low power mode. Due to that, they send status updates (heartbeat) to the server only every 3 minutes. Since they cause very little network traffic and don't communicate that often, some networks might disconnect them automatically. This is usually the case if you have some external firewall rules set or some specific AP settings.
To mitigate the issue, we recommend the following steps:
- Please verify with your networking team if you have any rules set, that could cause inactive devices to disconnect. Might be the external firewall or AP.
- Create a separate SSID only for JOAN devices. With this step, we avoid any issues with "overcrowded" WiFi network.