On the Nordic Thingy:53™, connector P1 is compatible with Qwiic and STEMMA QT and can be used to connect expansion boards. Connector P1 is compatible also with the STEMMA, Grove, and DFRobot Gravity prototyping systems, but they require a cable to convert from a 1 mm pitch connector to a 2 mm pitch connector.
The following schematic describes the expansion board interface.
Figure 1. Expansion board interface
