# JsonPath transformation error handling **URL:** \ **Category:** Scripts & Rules\ **Created:** [February 26, 2023, 3:45pm UTC](https://community.openhab.org/t/jsonpath-transformation-error-handling/144802 "2023-02-26T15:45:18Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![hafniumzinc](https://community.openhab.org/letter_avatar_proxy/v4/letter/h/b9bd4f/32.png) [@hafniumzinc](https://community.openhab.org/u/hafniumzinc)\ **Post date:** [February 26, 2023, 4:17pm UTC](https://community.openhab.org/t/jsonpath-transformation-error-handling/144802/4 "2023-02-26T16:17:05Z")
> [@MQTT 2.5 M1+ How to implement the equivalent to MQTT1 REGEX filters](https://community.openhab.org/t/mqtt-2-5-m1-how-to-implement-the-equivalent-to-mqtt1-regex-filters/68350): > > Problem In the MQTT1 binding there was a feature that let us filter messages published to a given topic and only pass those that match a given REGEX to the transformation and/or on to the Item. This was useful to handle devices that publish messages to a single well known topic for all their devices. For example, the official firmware from the vendor of Shelly devices have a request/response protocol over MQTT to get meta data about the devices (IP address, MAC address, firmware version, whethe… --- _[View the full topic](https://community.openhab.org/t/jsonpath-transformation-error-handling/144802)._