gr-smart_meters is a GNU Radio out-of-tree module meant to contain various decoders for smart meter manufacturers. The initial release contains a decoder for GridStream used by Landis+Gyr.
A guide on what is needed to get this running is available on the RECESSIM Wiki. The decoder is built off of gr-FHSS_Utils by Sandia Labs. https://wiki.recessim.com/view/Gr-smart_meters_Setup_Guide
Austin, TX. | Austin Energy | CRC = 0xD553
Dallas, TX | CoServ | CRC = 0x45F8
Dallas, TX | Oncor | CRC = 0x5FD6
Quebec, CAN | Hydro-Quebec | CRC = 0x62C1
Seattle, WA | Seattle City Light | CRC = 0x23D1