Polling Time

Note

For CloudPRNT Version MQTT (Trigger POST), the default setting is that a printer does not poll periodically.

Normally, when a CloudPRNT compatible printer is idle, it polls the server at the set polling interval time.

Polling also occurs in the following situations.

If an event occurs, such as a printer status change, a barcode being scanned or a key being pressed, then a poll to the server will be triggered immediately.

This allows very low latency operation, with the server able to respond to user events very quickly.

For CloudPRNT Version MQTT (Trigger POST) Polling occurs when a printer receives a request-post message.

While a print job is in progress, the device may not send polls to the server until the job is complete.

This is dependent on device implementation, and typically devices that support operations other than printing (such as barcode scanning) will continue to poll the server as usual, even while printing.

Compatibility Note:

Versions up to 1.3 of HI01x/HI02x firmware do not poll while printing.

However version 1.4 or later does send poll requests to the server during print operations, this allows continuous usage of all peripherals during a print operation.