During the COMPLETE Summer School on Microphysics and Dynamics of Clouds that was held on Zugspitze, Early Stage Researchers Miryam (ESR12), Tessa (ESR2), Tung (ESR14) and Taraprasad (ESR1) spent a couple of hours testing remote communication between a probe attached to a helium filled balloon and a receiver on the roof of the observatory. As part of the project's goals, they are working on the design of disposable micro-probes to be scattered in clouds.